Journal of
Plant Breeding and Crop Science

  • Abbreviation: J. Plant Breed. Crop Sci.
  • Language: English
  • ISSN: 2006-9758
  • DOI: 10.5897/JPBCS
  • Start Year: 2009
  • Published Articles: 426

JPBCS Articles

Genotype by environment interaction and yield stability analysis of open pollinated maize varieties using AMMI model in Afar Regional State, Ethiopia

February 2020

The present study attempts to analyze the magnitude of GxE interaction and evaluates the adaptability and stability of open pollinated maize genotypes for grain yield, using AMMI (Additive Main Effects and Multiplicative Interaction) model. The field experiment was conducted for two consecutive years during the off seasons of 2016/17 and 2017/18 at three locations namely, Awra, Dalifage and Dubti. The experiment in each...

Author(s): Mohammed Abate  

Identification of single nucleotide polymorphism (SNP) markers closely linked with powdery mildew resistance gene Pm5e in wheat

February 2020

Wheat (Triticum aestivum L.) is one of the most important food crops worldwide. Powdery mildew (Pm), caused by Blumeria graminis f. sp. tritici is a severe disease in wheat production. Gene Pm5e, from a Chinese wheat cultivar Fuzhuang 30 has proven to be a valuable resistance source for Pm in breeding. To further map this gene and develop Kompetitive allele-specific PCR (KASP) assays for marker-assisted selection (MAS),...

Author(s): Xiufang Yuan, Honggang Wang and Shubing Liu  

Evidences that polyploidization and hybridization affected resveratrol content in Arachis interspecific hybrids

December 2019

To broaden the genetic base of the allotetraploid peanut (Arachis hypogaea L.), pre-breeding programs have produced interspecific synthetic allotetraploids resulting from the chromosome duplication of hybrids between peanut related diploid species. These allotetraploids were highly cross-fertile with peanut making it possible to access the extensive genetic variability harbored by the wild species. This study aims to...

Author(s): Paula Vasconcelos Carvalho, Márcio de Carvalho Moretzsohn, Ana Cristina Miranda Brasileiro, Patrícia Messenberg Guimarães, Tânia da Silveira Agostini Costa, Joseane Padilha da Silva, and Marcos A. Gimenes  

Evaluation of hot pepper (Capsicum annuum L.) varieties for green pod yield and yield components in Western Tigray, Northern Ethiopia

December 2019

A field experiment was conducted at Humera Agricultural Research Center experimental site for two consecutive years (2011/2012 and 2012/2013 cropping season) under irrigation condition to evaluate performance of hot pepper varieties for green pod yield and yield components in western Tigray, Northern Ethiopia. A total of six hot pepper varieties were used as test genotypes. Least Significant Difference (LSD) and Pearson...

Author(s): Shushay Chernet and Haile Zibelo  

Efficacy of insecticides and crop critical stage for the management of chickpea pod borer (Helicoverpa armigera) in Central Zone of Tigray, Ethiopia

November 2019

Chickpea pod borer (Helicoverpa armigera) is a major insect pest constraining chickpea production in Tigray, northern Ethiopia, as there is no recommended management option in the area. Therefore the present study was conducted to assess the efficacy of insecticides and to determine the critical growth stage of the crop for effective spray at Axum Agricultural Research Center. Results indicated that in laboratory profit...

Author(s): Zereabruk Gebretsadkan, Weldu Nahom and Wolday Kiros  

Heritability studies of drought tolerance in groundnuts using the North Carolina design II fashion and variance component method

November 2019

Drought is the most important abiotic limitation to groundnut yields across the world, and the Northern Regions of Ghana. The study estimated the heritability and genetic variability of selected parents of groundnut for drought tolerance traits to aid in their effective selection and utilization. The North Carolina II mating design was adopted while the variance component method was used to estimate heritabilities in...

Author(s): Oppong-Sekyere D., Akromah, R., Ozias-Akins P., Laary, J. K. and Gimode D.  

Evaluation of coffee berry disease resistance (Colletotrichum kahawae) in F2 populations derived from Arabica coffee varieties Rume Sudan and SL 28

November 2019

Coffee supports livelihoods of approximately 125 million families worldwide and over 700,000 households in Kenya. The epidemics of Coffee berry disease (CBD), caused by Colletotrichum kahawae, destroy up to 80% of the developing berries on susceptible varieties. The control of the disease using chemicals accounts for 30 to 40% of the production cost and contributes to environment pollution, hence the use of resistant...

Author(s): James M. Gimase, Wilson M. Thagana, Chripine O. Omondi and John M. Ithiru  

Genetic dissimilarity and growth of coffee in Cerrado

November 2019

Genetic dissimilarity can be used to identify promising genotypes for cultivation in specific conditions. Thus, the objective of this work is to study the genetic dissimilarity among 35 genotypes of Coffea arabica in the Cerrado, under irrigation, using phenological data and multivariate statistics. Plant height, stem diameter, canopy diameter, number of orthotropic branch nodes, length of orthotropic branch internodes,...

Author(s): Cleiton Mateus Sousa, Welington Pereira, Marcos Gonçalves da Silveira, Mariella Camargo Rocha and Vinicius Gonçalves Almeida  

Estimates of genetic parameters and genotype by environment interactions for sugar yield and its components in sugarcane genotypes in Western Kenya

November 2019

This study was conducted to estimate broad sense heritability, genetic advance, GE interactions and correlations among quality traits in sugarcane clones in western Kenya. Thirteen sugarcane promising clones and one check cultivar were evaluated plant and ratoon crops in three locations under rain fed conditions using the randomised complete block design with three replications.  Analysis of variance showed...

Author(s): Japheth Embeywa Jamoza, James Owuoche and Oliver Kiplagat

Germplasm collection and morphological characterization of local accessions of tigernut (Cyperus esculentus L.) in Ghana for conservation and utilization

September 2019

Tigernut (Cyperus esculentus L.) is a nutritious crop of the sedge family.  In Ghana available local accessions have not been collected and characterized for conservation and utilization purposes. The objective of this study was to collect, conserve and characterize twenty-four local accessions of tigernut in Ghana based on agro-morphological traits. The ANOVA revealed significant (p<0.05) differences among the...

Author(s): Esther Donkor, Daniel Nyadanu and Harrison Dapaah  

Resistance of cowpea to Cowpea bruchid (Callosobruchus maculatus Fab.): Knowledge level on the genetic advances

September 2019

Cowpea [Vigna unguiculata (L.) Walp.] is an important food legume. This crop considered as source of dietary protein is also used as a leafy vegetable in many African countries. Its usage as food and animal fodder is focused on food security and diminishing malnutrition particularly in marginal areas. Bruchid (Callosobruchus maculatus) is the most damaging, cosmopolitan pest of stored cowpea grains especially in the...

Author(s): D. Kpoviessi, S. Agbahoungba, Eric E. Agoyi, D. C. Chougourou and A. E. Assogbadjo

Identification of rice genotypes tolerant to submergence at seedling stage in Uganda

August 2019

Floods have destroyed over 2000 acres of rice in Uganda which affected yield and caused losses to farmers. This problem is more pronounced when fields are not well leveled, and the mode of irrigation is by surface flooding. Majority of lowland rice fields in East African region are of this nature and are thus prone to yield losses. There are no submergence tolerance varieties identified in Uganda, so far. To address...

Author(s): Anna Bildadi Mlaki, Paul Gibson, Richard Edema, Jean Claude Habineza, Gerald Mwanje, Jimmy Lamo and Ephraim Nuwamanya  

Diallel analysis of scald and net blotch resistance in barley (Hordeum vulgare L.)

July 2019

Scald and net blotch are major foliar diseases of barley causing high yield losses worldwide including Ethiopia. Development of varieties with double resistance is an effective approach of managing both diseases. However, the genetic background of the barley parents was not studied for future resistance breeding. Thus, the objective of the study was to assess genotype performances against scald and net blotch,...

Author(s): Zerihun Jalata, Firew Mekbib, Berhane Lakew and Seid Ahmed  

Field performance of shrunken-2 super-sweet corn populations derived from tropical field maize × shrunken-2 super-sweet corn crosses in Ibadan, Nigeria

May 2019

The conversion of tropical field corn genotypes into sweet corn could broaden the genetic base and improve yield and adaptation of sweet corn varieties. In this study, the performance of shrunken-2 (sh2) super-sweet corn populations derived from crosses between a sh2 population and tropical field corn genotypes were evaluated in Ibadan. Experiments were conducted using randomised complete block design with three...

Author(s): Ayodeji Abe, Oladayo Abosede Lasisi and Olabisi Josephine Akinrinbola,  

Evaluation of genetic variability, heritability, genetic advance and correlation for agronomic and yield components in common bean landraces from South western Kenya

May 2019

The present study was conducted to estimate the genetic variability, heritability, genetic advance and association among selected agronomic traits of common bean landraces from South western Kenya. The field experiment was conducted using 52 common bean landraces at the Kenya Agricultural and Livestock Research Organization (KALRO), Kisii Research Center during 2015 and 2016 main cropping seasons. The experimental...

Author(s): Henry N. Anunda, Evans N. Nyaboga and Nelson O. Amugune  

Genetic relationships among regenerated tall coconut (Cocos nucifera L.) accessions from multivariate analyses using reliable short list of morphological descriptors in Côte d’Ivoire.

May 2019

Genetic relationships among 18 regenerated tall coconut accessions from International Coconut Genebank for Africa and Indian Ocean (ICG-AIO) located at Côte d’Ivoire were studied. Analyses were achieved from 17 quantitative characters of the reliable minimal list of agro-morphological descriptors for coconut proposed by Coconut Genetic Resources Network (COGENT) in 2007. From achieved Multivariate Analyses...

Author(s): Yao Saraka Didier Martial, Diarrassouba Nafan, Dago Dougba Noël, Koffi Eric Blanchard Zadjehi, Fofana Inza Jesus, Konan K. Jean-Noel, Konan Konan Jean Louis, Bourdeix Roland, Sie Raoul Syvère and Zoro Bi I. Arsène  

Genetic diversity analyses of rice germplasm using morphological traits

April 2019

The study of genetic diversity of any germplasm helps to facilitate its use and management. This experiment was carried out to determine the genetic diversity among 87 rice accessions from six countries. Seventeen quantitative traits were recorded based on the internationally accepted standard evaluation system for rice from IRRI. Analysis of variance, principal component analysis (PCA) and correlation amongst...

Author(s): Ibrahim Soe, Alex Tamu, Maxwell D. Asante Daniel Nyadanu and Richard Akromah  

Integrated evaluation of potato varieties in the highlands of Girar Jarso Woreda, North Shewa, Ethiopia

April 2019

In Ethiopia, farmers are cultivating potato under a wide range of environmental conditions. Despite its genetic potential, the productivity of potato is relatively low. Among the long list of production constraints, the absence of high yielding and disease resistant varieties in different corners of the country are the prominent ones. Its suitable edaphic and climatic conditions make the highlands of Girar Jarso Woreda...

Author(s): Amha Besufkad, Bekele Gemechu, and Abate Mekuriaw,  

Microsatellites revealed genetic diversity and population structure in Colombian avocado (Persea americana Mill.) germplasm collection and its natural populations

April 2019

Avocado (Persea americana Mill.) is one of the most consumed fruits around the world. The species is differentiated into three botanical races: Mexican, Guatemalan and West Indian. A genetic characterization of a Colombian avocado germplasm collection (N = 105) preserved since 2006 and 92 avocado “criollo” trees sampled in Antioquia was made with 12 microsatellites. Colombian avocado exhibits higher genetic...

Author(s): Gloria Patricia Cañas-Gutiérrez, Rafael Eduardo Arango-Isaza and Clara Inés Saldamando-Benjumea  

Genetic variability, heritability and genetic advance in shrunken-2 super-sweet corn (Zea mays L. saccharata) populations

April 2019

Inbred line development requires information on the nature and magnitude of genetic variability and transmissibility of desired trait in source populations. In this study, the level of genetic variability, heritability and genetic advance of thirteen agronomic and fresh yield traits among twelve shrunken-2 super-sweet corn populations were evaluated. Field experiments were conducted for two years in Ibadan, Nigeria...

Author(s): Ayodeji Abe and Comfort Adeola Adelegan  

Generation and evaluation of heterogeneous genotypes of tomato for small-scale farmers

March 2019

Tomato is broadly distributed in tropical and subtropical America, where small farmers cultivate commercial and landraces or heirloom genotypes, which exchange genes within them when are planted in the same plot. In this context, three different genetic groups of tomato were evaluated for agromorphological and yield traits under greenhouse to assess the differences in function of the genotypic homogeneity and...

Author(s): José C. Carrillo-Rodríguez, José L. Chávez-Servia, Ricardo Lobato-Ortiz and Catarino Perales-Segovia  

Determination of optimum plant density of broadcasting, row planting and transplanting on yield and yield components of Tef [Eragrostis tef (Zucc.) Trotter] in Central Zone of Tigray, Ethiopia

March 2019

The low national   tef productivity is mainly attributed by lack of improved agronomic practices.  The row planting and transplanting is one of the promising planting techniques proved to boost the yield of tef. The objective was to determine the optimum seed rate, row, broadcasting and plant population in intra and inter row spacing of transplanted tef. A field experiment was carried out at Laelay...

Author(s): Chekole Nigus, Haftamu Hailekiros and Kiros Wolday  

Genetic Diversity Analysis of Ethiopian Elite Chickpea (Cicer arietinum L.) Varieties Based on Agronomic Characters

March 2019

This research aim to assess morphological diversity of the elite chickpea (Cicer arietinum L.) varieties in Ethiopia. Nineteen elite varieties of chickpea in Ethiopia were used to analyze the means and components of variability (genetic, phenotypic and environmental), and interrelationships (genetic and phenotypic) for yield and various other yield components. Such nineteen varieties were planted by the technique of...

Author(s): Zerihun Jida and Shiferaw Alemu  

Advances in carotenoid increments in storage parts of African staple crops

March 2019

The importance of vitamin A and other carotenoids in controlling micronutrient based deficiencies in particular VAD has been emphasized in recent years. This has resulted into demands for availing these nutrients in forms that are easily accessible for most of the populations in micronutrient deficient areas. Specifically in Africa, various programs have been instituted to bio-fortify crops with nutrients with more...

Author(s): Ephraim Nuwamanya and Evans Atwijukire  

Phenotype characterization and diversity assessment of mango (Mangifera indica L.) cultivars in Ethiopia

February 2019

Little efforts have been made on mango genetic resource assessment in Ethiopia though it is one of the major fruit crops. This study was conducted to assess the diversity of 69 mango cultivars of different growing regions of the country based on 44 phenotypic descriptors. The results of both univariate and multivariate analysis of variance computed for quantitative data, and results from descriptive statistics for...

Author(s): Tewodros Bezu Neguse, Fredah K. Rimberia Wanzala, Wassu Mohammed Ali, Githiri Stephen Mwangi and Willis O. Owino  

Genetic variability studies on bread wheat (Triticum aestivum L.) genotypes

February 2019

Thirty bread wheat genotypes were tested to assess the genetic variability, among studied genotypes using alpha-lattice design at Tongo sub-center of Assosa Agricultural Research Center and Kulumsa Agricultural Research Center in 2015. Analysis of variance revealed that there were statistically significant differences among the genotypes for most of the traits at individual and across locations. From the combined...

Author(s): Alemu Dabi, Firew Mekbib and Tadesse Desalegn  

Resistance Mechanisms of Tomato (Solanum lycopersicum) to Root-Knot Nematodes (Meloidogyne species)

February 2019

Root-knot nematodes (Meloidogyne species) are the most devastating and as such they cause significant yield loss in tomato production. They are widely distributed in major tomato producing areas especially in warm climatic conditions. Because of the environmental impact of the application of pesticides, the use of nematode resistant varieties is becoming the most effective alternative to control root-knot nematodes....

Author(s): Mengistu Wubie and Zebyder Temesgen  

Evaluation of the parental and hybrid lines- Heterosis and other genetic parameters among Capsicum annuum genotypes and their hybrids

January 2019

In most parts of the world pepper has become a popular spice that makes food hot in addition to its much needed nutrients of carotenoids and vitamins. This report has its objective to evaluate the parents and hybrid of three Nigerian pepper genotypes (Shombo, Tatase and Nsukka yellow pepper) for growth and yield; and to estimate their genetic parameters. Conventional breeding by hand pollination was adopted. The mean...

Author(s): Abu Ngozi E., Udoh O. E. and Uguru M. I.  

Development and screening of cowpea recombinant inbred lines for seedling drought tolerance

January 2019

The use of multiple traits for drought study affirms the complexity of drought tolerance in cowpea. Despite the availability of several traits for drought tolerance evaluation, the rapid screening technique used by many scientists for seedling drought in wooden boxes is the simplest method for screening large populations. The objective of this study was to select drought tolerant cowpea recombinant lines developed from...

Author(s): Alidu M. S., Asante I. K., Tongoona P., Ofori K., Danquah A. and   Padi F. K.  

Genetic action and potence ratio of maize in an 8×8 diallel cross growing under saline condition

January 2019

Twenty-eight hybrids of Zea mays L. produced in 2015-16 from 8×8 half diallel mating design were evaluated along with their parents in 2016-2017 under saline condition to find out genetic action and potency ratio of some agronomic and yield contributing traits. Genetic action and potency ratio were analyzed following Hayman’s diallel analyses and Smith’s formula, respectively. Genetic parameter like...

Author(s): M.M. Rohman, S. H. Omy, S. Begum, M. A. Rahman, M. G. Hossain, M. M. Hoque and M. Amiruzzaman

Anther-derived callus induction based on culture medium, myo-inositol, AgNO3 and Fe-EDTA in ‘Seolhyang’ strawberries

January 2019

Haploid breeding is an effective method of shortening the breeding period of plants. In this study, to develop a haploid breeding technique, optimum conditions of the culture medium were investigated for anther-derived callus induction in the strawberry cultivar Seolhyang. The effects of the culture medium type, myo-inositol, auxin and cytokinin combination treatment, silver nitrate (AgNO3), and ferric...

Author(s): Haeyoung Na, Bong Seong Kim and Jungbeom Kim  

Curauá genetic diversity in germplasm banks and natural populations

December 2018

Ananas comosus var. erectifolius (L. B. Sm.) Coppens & F. Leal, populary known as curauá, is a bromeliaceae, found in the Amazonian flora. It is of great commercial interest, mostly for the automobile industry. Despite the curauá’s potential, little has been done to conserve its germplasm. For this, it’s necessary to know its genetic variability. An efficient way of knowing it is to use...

Author(s): Osmar Alves Lameira, Marcos Aparecido Gimenes, Raphael Lobato Prado Neves, Maria do Socorro Padilha de Oliveira, Simone de Miranda Rodrigues, Luiz Fernandes Silva Dionisio and Maria Rosa Travassos da Rosa Costa  

Influence of environment on soybean [Glycine max (L.) Merr.] resistance to groundnut leaf miner, Aproaerema modicella (Deventer) in Uganda

December 2018

Groundnut leaf miner (GLM) [Aproaerema modicella (Deventer)] is a serious problem for soybean cultivation in Uganda causing yield losses of up to 100%. The use of soybean [Glycine max (L.) Merr.] cultivars resistant to GLM attack is an important strategy in the integrated pest management program. The aim of this study was to determine the environment × genotype interaction influence on the soybean resistance...

Author(s): Angele Pembele Ibanda, Jeninah Karungi, Geoffrey Maxwell Malinga, Georges Adjumati Tanzito, David Ocan, Arfang Badji, Natasha Mwila, Thomas Lapaka Odong, Phinehas Tukamuhabwa and Patrick  Rubaihayo  

GGE biplot phenotypic stability analysis of soybean [Glycine max (L.) Merril] genotypes

December 2018

The study on genotypes by environment interaction (GEI) and stability analysis was conducted to determine the G, E, and GEI variance magnitudes. The experiment was carried out at three locations in two consecutive years on 26 soybean genotypes using randomized complete block design (RCBD) design with three replications. The objectives were to (i) estimate the magnitudes of G, E, and GEI effects, (ii) stability analysis...

Author(s): Ermiyas Tefera  

Characterization and correlation analysis of economically important parameters of lentil exotic germplasm

November 2018

The basic aim of this study is to evaluate the exotic lentil germplasm (BIGMP LIEN-MH-18) received from ICARDA. Economically desirable characters were studied and correlated to select the genotypes for the targeted breeding programme. Thirty-six lentil exotic entries were studied. The exotic genotypes 36102 and 36108 yielded 665 and 625 kg/ha respectively similar to our local recommended check (Punjab Masoor-09) that...

Author(s): Muhammad Rafiq, Sadia Kaukab, Aqsa Tahir, Masood Qadir, Muhammad Sajjad Saeed, Busharat Hussain and Gulfam Riasat  

Morphological characterization of common bean (Phaseolus vulgaris L.) landraces of Central region of Benin Republic

November 2018

Common bean (Phaseolus vulgaris L.) is an important food consumed in every region in Republic of Benin; however, it remains a neglected and under-utilized crop. In order to assess the value of bean germplasm of the central region in the Republic of Benin for useful breeding programs, 57 accessions were collected from 23 villages. After a classification based on the morphological variables of the seeds, these accessions...

Author(s): Laura Estelle Yêyinou Loko, Azize Orobiyi, Arlette Adjatin, Joel Akpo, Joelle Toffa, Gustave Djedatin and Alexandre Dansi  

Genetic variability of some chickpea (Cicer arietinum L.) genotypes and correlation among yield and related traits in humid tropics of southern Ethiopia

October 2018

The current investigation evaluated the genetic variability of some chickpea (Cicer arietinum L.) genotypes and correlation among yield and related traits in Abaya Woreda. Five improved chickpea genotypes along with one local variety were laid out in randomized complete block design with three replications. Data were recorded from phenological, growth parameters; and yield and related traits depicted the ranges of mean...

Author(s): Mieso Keweti Shengu, Dereje Hirpa and Zenabu Wolde  

Correlation and path coefficient analysis of yield and quality components of garden cress (Lepidium sativum L.) genotypes in Ethiopia

October 2018

The improvement for a trait of interest can be achieved by both direct and indirect selection of characters that are more heritable and easy to select. The aim of this study was to determine the degree and nature of associations among seed yield and seed quality related characters. One hundred eight garden cress (Lepidium sativum L.) genotypes were evaluated for their yield and seed quality related traits using a...

Author(s): Legesse Tadesse, Firew Mekbib, Adugna Wakjira and Zerihun Tadele  

Genetic variability, heritability and genetic advance of maize (Zea mays L.) inbred lines for yield and yield related traits in southwestern Ethiopia

October 2018

Understanding the genetic variability, heritability and genetic advance of traits in any plant population is an important pre-requisite for breeding program. The experiment was conducted to assess the magnitude of genetic variability, heritability and genetic advance of 24 maize inbred lines for 16 quantitative traits. The field experiment was conducted during 2016 cropping season at Jimma Agricultural Research Center...

Author(s): Tadesse Jilo, Leta Tulu, Techale Birhan and Lemi Beksisa  

Evaluation of agronomic performance of beta-carotene rich (yellow fleshed) cassava varieties in Nigeria

October 2018

Twenty-five yellow fleshed cassava varieties including three checks (two improved and one local) were evaluated in a randomized complete block design with four replications in three locations in Nigeria. Tuber yield, dry matter content, root size, fiber content, harvest index, sprouting and vigor of the varieties evaluated were all significant at 0.05 significant levels across the locations. Taste, color of unexpanded...

Author(s): Adetoro N. A., Ogunbayo S. A., and Akinwale M. O.  

Assessment of salt tolerance and variability within some rice germplasm using microsatelittes

October 2018

Soil salinity is a major abiotic stress that affects rice production. It can reduce yield drastically and result in total crop failure. The objectives of this study are to determine the genetic diversity within thirty-six rice accessions and to identify genotypes that are tolerant to salinity. Thirty-six rice accessions including three check varieties were sown in experimental pots and their leaves harvested for DNA...

Author(s): Anyomi W. E., Ashalley R., Amoah N.K.A, Blay E.T. and Ofori K.  

Evaluations of faba bean (Vicia faba L.) varieties for yield and yield related traits in central zone of Tigray, Northern Ethiopia

September 2018

A field experiment was carried out at Laelay maichew and Tahtay maichew districts in central zone of Tigray, Northern Ethiopia, for two consecutive seasons (2014/2015 to 2015/2016) under rain fed conditions. The objective of the study was to evaluate and select best performing faba bean varieties. Ten faba bean varieties including the local check were evaluated in randomized complete block design (RCBD) in three...

Author(s): Kiros Wolday  

Stability for descriptors of Solanum aethiopicum Shum group (family Solanaceae)

September 2018

Solanum aethiopicum Shum group is a nutrient-rich and income-generating crop enterprise in various sub-Saharan Africa countries. Despite its importance, the development of its improved varieties has not been prioritized. Until now, no field-based descriptor development reference for the crop is available for testing candidate varieties for distinctiveness, uniformity and stability. The purpose of this study is to...

Author(s): Nahamya Pamela Kabod, Godfrey Sseremba, Ruth Buteme, Michael Masanza, Elizabeth Balyejusa Kizito and Katwijukye Apolo Kasharu  

Inheritance and combining ability of cowpea resistance to bruchid (Callosobruchus maculatus F.)

September 2018

The bruchid, Callosobruchus maculatus (F.) is one of the most destructive pests and causes substantial losses to cowpea during storage in tropical and subtropical regions. The development of successful breeding strategy requires knowledge on gene action and trait inheritance in local and improved sources. In this study, the mode of inheritance, the types of gene action and maternal effects of cowpea resistance to...

Author(s): Weldekidan Belay Miesho, Ulemu Mercy Msiska, Hailay Mehari Gebremedhn, Geoffrey Maxwell Malinga, Patrick Obia Ongom, Patrick Rubaihayo and Samuel Kyamanywa  

Genotype by environment interaction and stability analysis of cowpea [Vigna unguiculata (L.) Walp] genotypes for yield in Ethiopia

September 2018

Ethiopia is claimed to be a center of diversity for cowpea production. The crop is the most drought tolerant and could help the country overcome the recurrent drought problem; however, the yield is very low due to lack of effort to develop varieties. This research was conducted to evaluate the stability of cowpea genotypes and to estimate the magnitude of genotypes by environment interaction (GEI) effect on grain yield....

Author(s): Tariku Simion, Wassu Mohammed and Berhanu Amsalu  

Inheritance and combing ability in maize using a 7x7 diallel cross

September 2018

Twenty one F1s produced from 7x7 diallel mating along with the 7 parents were evaluated to notice the inheritance and combining ability of different traits to obtain high heterotic crosses. Genetic analysis and combing ability were analyzed following Hayman’s and Griffing’s diallel analyses, respectively. Hybrids projecting positive or negative potency ratio with >1.0 value for those traits is also the...

Author(s): S. Begum, S. S. Alam, S. H. Omy, M. Amiruzzaman and M. M. Rohman  

Agro-morphological characterization of some taro (Colocasia esculenta (L.) Schott.) germplasms in Ghana

August 2018

Taro (Colocasia esculenta (L) Schott.) is one of the underutilized crops in Ghana which has great potential in terms of food and nutritional value. Eighteen (18) accessions collected from Samoa (8), Malaysia (2), Indonesia (2) and Ghana (6) were studied under field conditions to collect data on their agro-morphological characteristics and yield potential for the development of the crop. The study was conducted at...

Author(s): R. Boampong, L. M. Aboagye, D. Nyadanu and M. Esilfie  

Potential in a collection of adapted and exotic tropical maize inbred lines as resistance source for stem borers

August 2018

Lepidopteran borers are the most devastating field pests of maize in West and Central Africa. In view of the rapidly changing climate which favours an upsurge of more destructive biotypes of insect pests, diverse sources of resistance from different genetic backgrounds need to be harnessed for crop improvement purposes. Forty tropical maize inbreds comprising adapted and exotic lines from International Institute of...

Author(s): Qudrah Olaitan Oloyede-Kamiyo, Sam Oyewole Ajala and Anthony Oluwatoyosi Job  

Evaluation of constraints in production of root and tuber crops in Ethiopia: Overview of policy neglected climate resilient food security crops

August 2018

The objective of the current study was to examine the major constraints in production of root and tuber crops in Ethiopia with emphasis on identifying the policy gaps. This appraisal was based on survey report of Central Statistical Agency (CSA) for the period of 2011 to 2015. Data of CSA report was chosen for the current study with the view to gain an overview of policy packages in root crops in contrast with other...

Author(s): Semeredin Yimer and Tsegaye  Babege  

Varietal screening for resistance against field and storage crop pests: An implication for Ethiopian crop variety development

August 2018

Food security in developing countries like Ethiopia has been a challenge for many years due to pre and post-harvest losses of agricultural products which are caused by different biotic and abiotic factors.  Grain losses from pest infestation prior to harvest and during storage are a serious problem, particularly in developing countries like Ethiopia. More than 70% insect pests have been identified; they attack...

Author(s): Muez Berhe Gebremdein  

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