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: 409

JPBCS Articles

Performance evaluation of indigenous Arabica coffee genotypes across different environments

November 2014

Evaluation of 30 Arabica coffee genotypes was carried out at four different locations in south-western Ethiopia to identify genotypes that exhibits stable performance across wide environments. The analyses of variances revealed that yield differences among genotypes were highly significant at all locations in both seasons except at Jimma during the second season. The interaction was also highly significant. Six...

Author(s): Yonas Belete, Bayetta Belachew and Chemeda Fininsa

Combining ability and heterosis for different agronomic traits in maize (Zea mays L.) under drought stress in the Sudan Savanna of Borno State, Nigeria

October 2014

Combining ability variances were estimated for grain yield and its related traits in maize (Zea mays L.). Nine maize varieties consisted of five IITA open pollinated varieties (OPVs) and four local varieties were crossed in line x tester mating design. During the 2007 cropping season to determine the general combining ability (GCA), specific combining ability (SCA) effects and heterosis. Parents and hybrids were...

Author(s): D. Aminu, M. A. Dawud and A. Modu

Evaluation of bean qualities of indigenous Arabica coffee genotypes across different environments

October 2014

Evaluation of bean qualities of 30 Arabica coffee genotypes were carried out at four different locations (South-western Ethiopia). The genotypes had high overall yield potential, during a preliminary evaluation carried out at Gera. The differences among genotypes for cherry weight (CW), bean weight, parchment length (PL), bean length (BL), floater beans and outturn percent at each location were highly significant (p...

Author(s): Yonas Belete, Bayetta Belachew and Chemeda Fininsa

Crop nutrition studies on grain filling and chalkiness in rice

October 2014

Rice grain chalkiness can reduce crop quality resulting in lower grades and returns. It is as a consequence of loose starch and protein particles packing during grain filling and maturation, and may due to nutritional, biochemical, physiological and environmental conditions particularly in varieties with high inheritable chalkiness. This study set out to evaluate the response to varying levels of nitrogen and potassium...

Author(s): Puran Bridgemohan and Ronell S. H. Bridgemohan

Genetic diversity studies for quantitative traits of tomato (Solanum lycopersicon L.) genotypes in Western Tigray, Northern Ethiopia

September 2014

The objective of the study was to estimate genetic diversity among tomato genotypes. Thirty-six genotypes introduced from different countries were evaluated at Humera Agricultural Research Center, Northern Ethiopia, during 2010/2011 in 6 × 6 simple lattice design with two replications. Cluster analysis was made by average linkage method. Mahalanobis distance (D2) was used to estimate the genetic distance between...

Author(s): Shushay Chernet, Derbew Belew and Fetien Abay

Efficient propagation of an endangered medicinal plant Jurinea dolomiaea Boiss in the North Western Himalaya using rhizome cuttings under ex situ conditions

September 2014

Jurinea dolomiaea is an important medicinal and aromatic plant species of Kashmir Himalaya. Due to its tremendous overexploitation the species has been listed as endangered for Himalayan region. In this study we carried out the propagation of J. dolomiaea using rhizome cuttings. Propagation through rhizome cuttings is a means towards conserving the species and making available planting material of this species for...

Author(s): Asma Banday, Irshad Ahmad Nawchoo, Zahoor Ahmad Kaloo, Peerzada Arshid Shabir and Ali Abbas Rather

Effects of yield components on yield potential of some lowland rice (Oyza sativa L.) in coastal region of Southern Nigeria

September 2014

The coastal region of Nigeria has abundant water naturally good for rice production, which is untapped due to oil exploration. The study was conducted to access the relationship between grain yield (GY) and its components of twenty-six segregating lines for the coastal region of Southern Nigeria. The experiment was conducted at the University of Port Harcourt teaching and Research Institution of Faculty of Agriculture...

Author(s): Andrew A. Efisue, Bianca C. Umunna and Joseph A. Orluchukwu

Response of transgenic Bt cowpea lines and their hybrids under field conditions

August 2014

Transgenic cowpeas are those genetically engineered with Cry1Ab gene for protection against the lepidopteran pest Maruca vitrata that could inflict upto 80% yield loss in severe infestation. Two transgenic events TCL-709 and TCL-711 were crossed to three non-transgenic lines IT97K-499-35, IT93K-693-2 and IT86D-1010 to generate six set of F1 hybrids. The study was designed and conducted to evaluate the performance of...

Author(s): Mohammed, B. S., Ishiyaku, M. F., Abdullahi, U. S. and Katung, M. D.

Analysis on combing ability and estimation of genetic parameters for chlorophyll content in maize

August 2014

Chlorophyll closely related to photosynthetic capacity and developmental stage in crops. In order to reveal the genetic characters of chlorophyll content in leaf above ear, ear leaf and leaf under ear (three-ear-leaves) of maize, ten inbred lines from five different heterotic groups were selected to make crosses by a completely diallel cross design. The combining ability analysis and genetic parameters estimations of...

Author(s): Haochuan Li, Jihua Tang, Yanmin Hu, Jiwei Yang and Zonghua Liu

Evaluation of highland maize (Zea mays L.) cultivars for polyethylene glycol (PEG) induced moisture stress tolerance at germination and seedling growth stages

July 2014

A laboratory experiment was performed at Ambo University, Department of Plant Sciences in March 2014, to evaluate the effect of moisture stress on germination and seedling growths of highland maize cultivars. The experiment was arranged factorially in completely randomized design with three replications. Five highland maize cultivars (Hora, Wenchi, Jibat, Argene and Wabi) were exposed to six levels of water stress (0,...

Author(s): Habtamu Ashagre, Melkamu Zeleke, Mesfin Mulugeta and Ermias Estifanos

Combining ability studies of pigeonpea cytoplasmic male sterile (CMS) lines with an obcordate leaf marker

July 2014

Hybrid pigeonpea [Cajanus cajan (L.) Millsp.] breeding technology based on cytoplasmic male sterile (CMS) was recently developed in India. A program was initiated to track the purity of female parental lines by incorporating an obcordate leaf shape marker in established male sterile A-lines. Seven obcordate A-lines developed by backcrossing and selection were crossed with four known fertility restorers in line x tester...

Author(s): S. B. Patil, A. J. Hingane, C. V. Sameerkumar, M. Myer, R. Vijaya Kumar and K. B. Saxena

Effect of initial stem nodal cutting strength on dry matter production and accumulation in cassava (Manihot esculenta Crantz)

June 2014

This study was done to determine the effect of initial node strength on dry matter yield of cassava. Studies were conducted at the Waterloo Research Campus, University of Trinidad and Tobago using the sets of Mexican variety (Mx) at 6 months with 1 to 3 nodes, 4 to 9 cm, and dry matter of 6 to 15 g/set. The crop was established at 60 × 80 cm and treated with a compound NPK fertilizer. Growth analysis (functional...

Author(s): Puran Bridgemohan and Ronell S. H. Bridgemohan

Successful boll development after ovary damage during emasculation of Upland cotton flowers

June 2014

Gossypium hirsutum flowers are easily emasculated by splitting the staminal column with the fingernail and removing the corolla and androecium. However, any damage to the ovary is considered detrimental to successful boll formation and damaged flowers are typically discarded.  This study evaluated boll retention after different emasculation treatments. Removal of the membrane surrounding the ovary reduces boll...

Author(s): John E. Erpelding, Salliana R. Stetina and Rickie B. Turley

Genetics of yield and some yield contributing traits in Upland cotton (Gossypium hirsutum L.)

May 2014

Inheritance, general combining ability and specific combining ability were studied using four parents: FH-901, NIAB-Karishma, CIM-496 and MS-84 for different plant traits in Upland cotton (Gossypium hirsutum L.). Mean values of all genotypes were significantly different from each other for all the traits studied. Epistasis was not found to be involved in any of the traits. The inheritance of all the traits was...

Author(s): Amir Latif, Tanweer Ahmad, Sikandar Hayat, Ghulam Sarwar, M. Zahid Ehsan, Muzaffar Raza, Muhammad Sarwer and Iftikhar Ahmad Khan

Use of biplot approach for genetic analysis of yield and related traits in cotton (Gossypiumbarbadense)

April 2014

Combining ability is an important genetic attributes to cotton breeders in anticipated improvement via hybridization and selection. Seven parents were involved in a half diallel mating design which was analyzed by genotype × environment interaction (GGE) biplot graphical method. General combining ability (GCA) and specific combining ability (SCA) effects were significant for all traits. None of the parents were...

Author(s): H. M. E. Hamoud

Reliability and comparison of the polymorphism revealed in amaranth by amplified fragment length polymorphisms (AFLPs) and inters simple sequence repeats (ISSRs)

April 2014

The present study reported the effectiveness of two PCR-based molecular techniques, inters simple sequence repeats (ISSRs) and amplified fragment length polymorphisms (AFLPs), for genetic assessment of amaranth. The polymorphic loci ranged from 110 among A. caudatus to 228 among A. cruentus and 16 among A. tricolor to 56 among A. hypochondriacus for AFLP primer combinations and ISSR primers, respectively. Among the two...

Author(s): Oduwaye, O. A., Baránek, M. ÄŒechová, J. and Raddová, J.

Genotype-environment interaction and correlation of some stability parameters of total starch yield in potato in Amhara region, Ethiopia

March 2014

This study was carried out to assess the nature and magnitude of genotype-environment interaction (GEI) and the correlation among some stability parameters. Eleven potato genotypes were evaluated during 2011 rainfed season at three locations with Randomized Complete Block design with three replications in Amhara region. Combined analysis of variance indicated that the main effect due to location, genotype and genotype...

Author(s): Gedif, Mulugeta, Yigzaw, Dessalegn and Tsige, Genet

Combining ability for beta-carotene and important quantitative traits in a cassava f1 population

February 2014

 Cassava is ideal for biofortification due to its popularity as a root staple among populations with high vitamin A malnutrition. The crop is vegetatively propagated and retains the enhanced trait across generations. The combining ability for beta-carotene content and important yield trait was evaluated in a cassava F1 generation. Ten high beta-carotene clones from International Institute of Tropical Agriculture...

Author(s): Njenga, Peninah, Edema, Richard and Kamau, Joseph

Evaluation of various fungicides and soil solarization practices for the management of common bean anthracnose (Colletotrichum lindemuthianum) and seed yield and loss in Hararghe Highlands of Ethiopia

January 2014

The study was undertaken to evaluate the effect of integrated management of bean anthracnose through soil solarization and various fungicides applications on epidemics of the disease and to determine the effect of integrated management of bean anthracnose on seed yield and loss of common bean variety Mexican-142. Field experiments were conducted at Haramaya and Hirna in 2010 main cropping season of Ethiopia. Soil...

Author(s): Mohammed Amin, Ayalew Amare and Thangavel Selvaraj

Inheritance of stem diameter and its relationship to heat and drought tolerance in wheat (Triticum aestivum L.)

January 2014

Genetic control of stem diameter and other stem attributes of wheat in relation to yield components were analyzed in a 7- parent F1 diallel cross in favorable, drought and drought combined heat environments, as well as in 12 F2 populations under heat stress. Polygenes with mainly additive effects were involved in the control of stem diameter which segregated in normal distributions in the F2. The narrow-sense...

Author(s): Ahmed Sallam, El-Sayed Hamed, Mervat  Hashad and Mohamed  Omara

Farmer and consumer preferences for rice in the Ashanti region of Ghana: Implications for rice breeding in West Africa

December 2013

Rice has become an important staple in Ghana in recent years but most consumption is met by imports. In this study, farmers’ preferences for rice varietal traits especially grain quality and the relationship of grain quality with consumer acceptability of locally produced rice was investigated in the Ashanti region of Ghana. Both formal and informal survey approaches were employed to collect data. The farmers...

Author(s): Maxwell Darko Asante, Bright Owusu Asante, George Kwasi Acheampong, Samuel Kwame Offei, Vernon Gracen, Hans Adu-Dapaah and Eric Yirenkyi Danquah

Effect of African rice gall midge on yield and its components on inter-specific rice progenies, using correlation and principal components as analysis tools

November 2013

Inter-specific rice progeny lines (Oryza glaberrima × Oryza sativa) were evaluated for African rice gall midge resistance at two locations in 2010 cropping season. The experiment was made of 16 rice progeny lines including the two parents; FARO52 and Tog 7442 and a known susceptible check FARO 37. The experiment was conducted in the lowland experimental fields of National Cereals Research Institute at Badeggi and...

Author(s): M. Bashir, A. T. Maji and A. S. Gana

Standardization of seed dormancy breaking treatment in Senna (Cassia auriculata)

November 2013

The study conducted to standardize the seed dormancy breaking treatment in senna (Cassia auriculata) revealed that soaking the seeds in hot water (boiled to 100°C and removed from the flame) for 15 min and soaking with 100 ppm GA3 for 3 h had effectively improved the germination (98%), root length (7.2 cm), shoot length (9.5 cm), dry matter production (0.258 g per ten seedlings) and vigour index (1637) compared to...

Author(s): Ameer Junaithal Begum M., Vijayakumar A. and Selvaraju P.

Studies on variability and heritability for different quantitative characters in fenugreek under different environments

November 2013

Thirty diverse genotypes of fenugreek were grown in six (E1 to E6) environments during the winter seasons at the Agriculture Farm of Visva-Bharati University, India. The estimates of genotypic and phenotypic coefficients (GCV and PCV) variation in all the environments were moderate for plant height and test weight, and high for branch number, pod number, husk weight, stem weight and seed yield indicating little...

Author(s): P. C. Kole and A. Saha

Performance of single cross quality protein maize hybrids evaluated at Samaru-northern guinea savanna zone of Nigeria

November 2013

Diallel mating design was used to generate fifteen single cross hybrids including fifteen reciprocals. The hybrids were evaluated together with their parents and thirteen checks at Samaru, Northern Guinea Savannah, of Nigeria in the years 2005 and 2006. The experimental design used was 7 x 7 incomplete lattice designs with three replications. There were significant differences between the various genotypes for all the...

Author(s): M. Yusuf

GGE biplots to analyze soybean multi-environment yield trial data in north Western Ethiopia

November 2013

The study was undertaken with the objective to examine the nature and to quantify the magnitude of genotype x environment interaction effects on soybean [Glycine max (L.) Merr.] grain yield and to determine the winning genotype (s) for test environments in north western Ethiopia. The experiment was executed at four different locations of Ethiopia for two consecutive years (2007 and 2008) using thirty two genotypes...

Author(s): Mulugeta Atnaf, Sisay Kidane, Seltene Abadi and Zelalem Fisha

Yield stability in common bean genotypes (Phaseolus vulgaris L.) in the Sudan

October 2013

Common bean is an important food legume crop in Sudan. Drought and heat stress are considered the main factors responsible for low productivity. Nine common bean genotypes were evaluated for yield stability under different sowing dates and watering regimes in three field experiments conducted in the River Nile State-Sudan during 2003 to 2006. 10 test- environments were thus achieved, representing the combined effect of...

Author(s): Gamal E. Khalifa, Ali E. Eljack, Maarouf I. Mohammed, Osman M. Elamin and Elsadig S. Mohamed

Segregation analysis of cry7Aa1 gene in F1 progenies of transgenic and non-transgenic sweetpotato crosses

October 2013

Sweetpotato weevils are the most devastating pests of sweetpotato causing yield losses ranging from 60 to 100%. Their cryptic nature, where the larvae is found within plant tissues render them difficult to manage especially using chemicals control. Development of weevil resistant sweetpotato was conducted by crossing a transgenic event CIP410008.7 as a female parent with three Ugandan cultivars as male parents. Crossing...

Author(s): Rukarwa R. J., Mukasa S. B., Sefasi A., Ssemakula G., Mwanga R. O. M. and Ghislain M.

Genotype X environment interaction of maize (Zea mays L.) across North Western Ethiopia

September 2013

  A study was conducted at Northwestern Ethiopia, during 2010 main cropping season. Fifteen maize genotypes were evaluated at four locations that differ in soil type, altitude and mean annual rainfall. The experiment was laid out in a randomized complete block design with three replications. Stability parameters that are useful tools for identification of genotypes with specific and wide...

Author(s): Workie Anley, Habtamu Zeleke and Yigzaw Dessalegn

Genotype x environment interaction and yield stability estimate of some sweet potato [Ipomoea batatas (L.) Lam] breeding lines in South Africa

September 2013

    Genotype x environment interaction and yield stability was evaluated for root yield for 28 sweetpotato breeding lines in South Africa using the Additive Main Effects and Multiplicative Interaction (AMMI) stability parameter. Genotype x environment interactions showed the inconsistency of the performance of the breeding lines over environments and seasons. The analysis of...

Author(s): Adebola P. O., Abe Shegro, S. M. Laurie, L. N. Zulu and M. Pillay

Kernel quality and morphological traits of scented rice (cv. Super Basmati) in relation to irrigation and zinc application

September 2013

    Two year field study was conducted at Adaptive Research Farms Sheikhupura and Sargodha with the objective to investigate the impact of irrigation water and zinc application on kernel quality and morphological traits of scented rice, and genotype Super Basmati was selected for this study. Results indicated that increasing applications of irrigation and zinc has positive...

Author(s): Zuhair Hasnain and Hakoomat Ali

Combining ability and mode of gene action in cassava for resistance to cassava green mite and cassava mealy bug in Malawi

September 2013

The need to develop new improved varieties resistant to cassava green mite (CGM) and cassava mealy bug (CMB) as well as high yielding varieties requires knowledge on the mode of gene action controlling the expression of resistant traits to these pests.  Therefore, a study was carried out to determine combining abilities and mode of gene action for resistance to CGM and CMB by crossing cassava genotypes in a 7...

Author(s): Michael Malandula Chipeta, James M. Bokosi, Vincent W. Saka and Ibrahim R. M. Benesi  

Integrated nutrient management in winter maize (Zea mays L.) sown at different dates

September 2013

  A field experiment was conducted during rabi season of 2006 to 2007 and 2007 to 2008 to study the effect of sowing dates and integrated nutrient management on growth, yield and quality of winter maize. The trial was laid out in split plot design with three replications, assigning total 27 treatment combinations i.e. three sowing dates (15 October, 25 October and 5 November) in main plots and three levels...

Author(s): Neeraj Kumar Verma

Genetic diversity of Cymbidium kanran detected by Polymerase chain reaction–restriction fragment length polymorphism (PCR-RFLP) markers

August 2013

    Fifty-four Cymbidium kanran cultivars from China, Japan and South Korea were examined and analyzed by using polymerase chain reaction–restriction fragment length polymorphism (PCR-RFLP) markers to determine their molecular diversity and relationships. In chloroplast (cp) PCR-RFLP analyses, genetic differences were revealed in 4 of 6 primer sets (66.67%) and 19...

Author(s):   JIAN Li and ZHU Li-quan

Drumstick (Moringa oleifera Lamk.)improvement for semiarid and arid ecosystem: Analysis of environmental stability for yield

August 2013

    Integrating yield and stability of genotypes tested in unpredictable environments is a common breeding objective. The importance of stability estimation has more values in perennial crops such as drumstick (Moringa oleifera Lamk), as it has occupied the area for many years. Drumstick is found both in annual and perennial forms, where the former type bears only edible pods...

Author(s): Raja S., Bagle B. G. and T. A. More

Genetic variability and association among yield, yield related traits and oil content in Ethiopian garden cress (Lepidium sativum L.) genotypes

July 2013

    Garden cress (Lepidium sativum L.) is one of the aromatic plant species of Ethiopia containing edible oil with several medicinal implications. Grain yield and oil content of garden cress are usually low, depending on genetic variability and other important characters with these traits. Hence, the objectives of this study were to investigate genetic variability and...

Author(s):   Temesgen Bedassa, Mebeaselassie Andargie and Million Eshete

Genotype by environment interactions for grain yield in bread wheat (Triticum aestivum L.)

July 2013

    The combined ANOVA analysis for grain yield of ten wheat genotypes at 12 environments showed that bread wheat grain yield was significantly affected by environment, which explained 75.01% of the total treatment (genotype + environment + genotype by environment interactions) variation, whereas the G and GEI were significant and accounted for 9.48 and 15.5%, respectively. The...

Author(s): Naheif E. M. Mohamed

Screening of chickpea (Cicer arietinum L.) germpalsm against ascochyta blight [Ascochyta rabiei (Pass.) Lab.] correlation and combining ability analysis for various quantitative traits

June 2013

    The present study was conducted to estimate correlation and combining ability analysis among quantitative traits in chickpea (Cicer arietinum L.) during 2008 to 2010. Ten chickpea varieties/lines (08-AG-004, CH-70/02, CH-76/02,. Nine lines viz. AUG-27, M-98, 114, 115, 117, 781, 1049, 4025, and 5006 exhibited moderately NOOR-91, K-70005, K-70008, K-70022,...

Author(s):     Qurban Ali, Muhammad Iqbal, Arbab Ahmad, Muhammad Hammad Nadeem Tahir, Muhammad Ahsan, Nazir Javed and Jehanzeb Farooq

Analysis of the resistance to Phytophthora pod rot within local selections of cacao (Theobroma cacao L.) for breeding purpose in Cameroon

June 2013

    The level of resistance against Phytophthora pod rot (PPR) was assessed among locally-selected accessions of cacao, the so-called selection of Nkoemvone (SNK), in Cameroon. The evaluation approaches have included four tests: Leaf disc inoculation (LDT); detached pod inoculation (DPT); artificial inoculation of pods and counting of successful infections (%SI); and...

Author(s):   M. I. B. Efombagn, S. Nyassé, D. Bieysse and O. Sounigo,    

Principal component analysis of morphological traits in thirty-nine accessions of rice (Oryza sativa L.) grown in a rainfed lowland ecology of Nigeria

June 2013

    Field experiment was conducted at Edozhigi, National Cereal Research Institute experimental field, to assess the contribution of morphological traits to variability in some accessions of rice.  The field was laid out in a randomized complete block design with three replicates. Thirty nine entries collected from farmer’s field and National Cereals Research Institute...

Author(s):     Gana A. S., Shaba S. Z. and Tsado E. K.

Intra row spacing effect on shelf life of onion varieties (Allium cepa L.) at Aksum, Northern Ethiopia

June 2013

  A field experiment was conducted to investigate the influence of intra-row spacing and, variety on yield and shelf life of onion. The study was conducted between August 2010 and April 2011 at Aksum area (Laelay Maichew District). Three different intra-row spacings (5, 7.5 and 10 cm) were evaluated using 4 varieties of onion (‘Adama’ Red,...

Author(s):     Yemane Kahsay, Fetien Abay and Derbew Belew

Floral habits and seed production characteristics in “Egusi” melon (Colocynthis citrullus L.)

June 2013

  A research was carried out in the experimental farm of the Department of Crop Science, University of Nigeria, Nsukka to study some aspects of floral, fruit and seed yield characteristic of accessions of “Egusi” melon (Colocynthis citrullus L.). It was observed that male flower anthesis occurred earlier than female flower anthesis. Male flowers opened between 30 to 32 days after seedling...

Author(s): Ogbonna, Peter Ejimofor

Seasonal incidence of Plutella xylostella (Lepidoptera: Plutellidae) and its associated natural enemies in major crucifer growing areas of Kenya

May 2013

    Seasonal incidences of Plutella xylostella, diamondback moth (DBM) and its associated natural enemies were investigated in two agro-ecological zones of the major crucifer growing areas of Kenya in 2005 and 2006. DBM larvae and pupae were collected from the cabbage and kale crops grown in farmers’ field and maintained in the laboratory for the emergence of...

Author(s): Ruth Kahuthia-Gathu

Nature of gene action for yield and yield components in exotic genotypes of Italian millet [Setaria italica (L.) Beauv]

May 2013

    The present investigation was carried out with the objective to find out the extent of genetic variation, heritability and genetic advance for 13 characters in 34 exotic genotypes of Italian millet during Autumn 2008 and Spring 2009. High phenotypic coefficients of variation (PCV) coupled with high genotypic coefficients of variation (GCV) were observed for grain yield per...

Author(s):     P. Lakshmi Prasanna, J. S. V. Samba Murthy, P. V. Rama Kumar and V. Srinivasa Rao

Genotype x environment interaction and stability analysis for yield and its components in lentil

May 2013

    The objective of this investigation is to determine the performance and stability of 24 lentil (Lens culinaris Medik.) genotypes under a wide range of variable environments. The regression model and ecovalence (Wi) were used to analyze the response of the lentil genotypes to variable environmental conditions for yield and some of its components in six experiments in three...

Author(s): S. R. E. Abo-Hegazy, T. Selim and A. A. M. Ashrie

Agronomical evaluation of six soybean cultivars using correlation and regression analysis under different irrigation regime conditions

May 2013

    Two field experiments were conducted during summer seasons of 2011 and 2012 to study the effect of irrigation regimes at different growth stages on seed, oil and protein yields of soybean cultivars. The interrelationships among seed yield ha-1 and its attributes through simple correlation and stepwise regression analysis were evaluated. The results indicated that the...

Author(s): Ashraf A. Abd El-Mohsen, Gamalat O. Mahmoud and Sayed A. Safina

Selection of pepper parent from a collection of Capsicum annuum landraces based on genetic diversity

May 2013

    Phenotypic divergence among eleven landraces belonging to a collection of Capsicum annuum species and maintained at the Faculty of Science, University of Tunis, was quantified by multivariate analysis for seven morphological traits. The multivariate data set was analyzed by canonical discriminant analysis in combination with a clustering procedure using generalized...

Author(s): Karima Lahbib, Fethi Bnejdi and Mohamed El Gazzah

Performance of nine cassava (Manihot esculanta Crantz) clones across three environments

April 2013

    The study was carried out to quantify the genotype × environment interaction (G × E) and to estimate the phenotypic stability by genotype genotype × environment (GGE) biplot of nine cassava clones comprising 5 hybrids, 3 parent checks and 1 improved variety. The study was planted across three different environments; Fumesua, Pokuase and Ejura...

Author(s):     Peprah Bright Boakye, Ofori Kwadwo, Asante Isaac K. and Elizabeth Yaa Parkes,

Yield parameters and stabilty of soybean [Glycine max. (L.) merril] as influenced by phosphorus fertilizer rates in two ultisols

April 2013

    A field study was conducted for two years to assess the spatial and temporal effect of Phosphorus fertilizer on the yield, yield components and yield stability of five soybean genotypes in Umudike and Amakama in eastern Nigeria. The study was laid out as a split-plot in a randomized complete block with three replications. P rates of 0, 10, 20, 30 and 40 kg P/ha...

Author(s): Ikeogu U. N. and Nwofia G. E.

WAB-450: A valuable donor of earliness and productivity traits for rice breeding programme under rainfed upland ecosystem

April 2013

    This study focused on evaluation of introgressed population for earliness in flowering and productivity under rainfed upland rice ecosystem. The population was derived from inter-varietal cross between early maturing Africa upland land rice WAB-450, an inter-specific derivative as donor and Swarna, a mega rice variety from India, as recurrent parent. One hundred and...

Author(s):     Sangodele Emmanuel A., Hanchinal R. R., Hanamaratti N. G., Vinay Shenoy, Nadaf H. L. and Mohan Kumar V.

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