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

Host selection behaviour of aphid parasitoids (Aphidiidae: Hymenoptera)

November 2010

  Biological control is the central stone of Integrated Pest Management (IPM) paradigm and natural enemies are becoming an increasingly desirable prospect. Parasitoids are a widely used group of invertebrate natural enemies as biological control agents and several species are being used to control various aphid pests. In recent years, an increasing emphasis is being given to the conservation and...

Author(s): Abdul Rehman and Wilf Powell

Effect of different sowing dates on the yield and yield components of direct seeded fine rice (Oryza sativa L.)

November 2010

  The research was conducted to study the response of yield and yield components of direct seeded fine rice (Oryza sativa L.) to different sowing dates during 2008 at Agronomic Research Area, University of Agriculture Faisalabad. Experiment was laid out in a randomized complete block design with three replications having net plot size of 4 x 3 m. Experiment comprised of six different sowing dates that is...

Author(s): Nadeem Akbar, Asif Iqbal, Haroon Zaman Khan, Muhammad Kashif Hanifand Muhammad Usman Bashir

Effects of Gibberellic acid and 2,4-dichloro-phenoxyacetic acid spray on fruit yield and quality of tomato (Lycopersicon esculentum Mill.)

November 2010

  Experiment was conducted at Melkassa Agricultural Research Center, centeral rift valley of Ethiopia from September 2008 to January 2009 with the objective to determine the effects of different concentrations and combinations of 2,4-dichlorophenoxyacetic acid (2,4-D) and gibberellic acid (GA3) spray on fruit yield and quality of tomato. The experiment consisted of two tomato varieties-one processing (Roma VF)...

Author(s): Dandena Gelmesa, Bekele Abebie and Lemma Desalegn

Sustainable use of plant protection products in Nigeria and challenges

October 2010

  Nigeria’s drive to boost food security and to fight off insect pests and yield-limiting crop pathogens has led to an unintended consequence: the mass importation and build-up of obsolete and toxic pesticides. Nigerian farmers have been relying heavily on these agrochemicals for the control of various weeds, insect pests and pathogens, leading to the high importation of these products. Although...

Author(s): E. D. Oruonye and E. Okrikata

Effect of Eucalyptus pollen isolation methods on pollen viability, debris content, quantity isolated and pollen density per stigma

October 2010

  Success of interspecific hybridization in Eucalyptus depends on the availability of contamination free, clean and viable pollen from elite paternal trees. Unlike the natural process of open pollination, control pollination (CP) in Eucalyptus orchards, is a slow, tedious and labour-intensive procedure that involves high costs, but results in low seed yields. In order to overcome these...

Author(s): V. Girijashankar,

Agronomic and molecular evaluation of recombinant inbred lines (RILs) of lentil

October 2010

  Sequence-related amplified polymorphism (SRAP) and morphological markers were studied to compare the efficiency of both marker systems in the evaluation of twenty five lentil (Lens culinaris Medik.) recombinant inbred lines (RILs) and four testers. Data on 13 morphological traits were collected and analyzed. A total of 240 polymorphic SRAP’s bands (76.7%) were scored using four...

Author(s): C. Bermejo, V. P. Cravero, F. S. López Anido and E. L. Cointry

Screening of superior chickpea genotypes for various environments of Iran using genotype plus genotype × environment (GGE) biplot analysis

October 2010

  Superior crop cultivars must be identified through multi-environment trials (MET) and on the basis of multiple traits. The objective of this study was to explore the effect of genotype (G) and genotype × environment interaction (GE) on grain yield of 17 chickpea genotypes (Cicer arietinum L.) in six different research stations of Iran. GGE (G plus GE) biplot methodology was used to evaluate...

Author(s): Asghar Ebadi Segherloo, Sayyed Hossain Sabaghpour, Hamid Dehghaniand Morteza kamrani

Genetic diversity for sustainability of rice crop in Indian Punjab and its implications

October 2010

  The varietal diversity in rice crop in Indian Punjab has been increasing at a fast rate due to variable soil and climatic conditions and variable objective functions of the farmers. In spite of the fact that productivity of rice increased over time, as a result of improvement in technology and its fast adoption, the declining resource base, particularly water, soil health and pest resistance, the genetic...

Author(s):   Joginder Singh      

Application of advanced backcross QTL analysis in crop improvement

August 2010

  Domestication of crops is widely believed to be accompanied by a bottleneck that greatly reduces genetic diversity. This narrowing of genetic diversity restricts crop plant improvement by limiting the range of valuable traits available for use in modern plant breeding. Wild species are a broad resource to widen the germplasm and improve the traits in crop cultivars. However, genetic variation between species...

Author(s): Baohua Wang and Peng W. Chee

Development and use of microsatellites markers for genetic variation analysis, in the Namibian germplasm, both within and between populations of marama bean (Tylosema esculentum)

August 2010

  Tylosema esculentum (marama) has long been identified as a candidate crop for arid and semi-arid environments due to its success in these environments and the high nutritional value of the seed. Molecular markers are essential for the assessment of the levels of genetic variation present within and between populations of marama as well for future marker-assisted breeding efforts. Microsatellites were...

Author(s): M. Takundwa, E. Nepolo, P. M. Chimwamurombe, A. C. Cullis, M. A. Kandawa-Schulz and K. Kunert

Evaluation of head yield and participatory selection of horticultural characters in cabbage (Brassica oleraceae var. capitata)

August 2010

  Cabbage is an important leafy vegetable in sub-Saharan Africa, yet breeding and seed production activities take place in Europe and Asia. Participatory evaluation of varieties alongside head yield was carried out to select preferred varieties. Field experiments were conducted during the 2008 long rainy season and the 2008/09 short rainy season at AVRDC–The World Vegetable Center, Regional Center for...

Author(s): O. T. Adeniji, I. Swai, M. O. Oluoch, R. Tanyongana and A. Aloyce

Development of a fast and reliable ozone screening method in rice (Oryza sativa L.)

August 2010

  A rapid and reliable screening method for rice ozone tolerance was developed to enhance evaluation technique in determining the reaction of tolerant and susceptible genotypes at the early stage of growth. Plant growth parameters were measured to evaluate ozone effects on the growth of seedlings which can be later used as criteria for ozone tolerance. Plants were subjected to 0.3 and 1 ppm ozone using 15 and...

Author(s): Norvie L. Manigbas, Dong-Soo Park, Soo-Kwon Park, Sang-Min Kim, Woon-Ha Hwang, Hang-Won Kang and Gihwan Yi

Comparative effects of water deficit on Medicago laciniata and Medicago truncatula lines sampled from sympatric populations

August 2010

  We evaluated the responses to water deficit of twelve lines of Medicago laciniataand Medicago truncatula including eight lines from four Tunisian sympatric populations of both species, and four references lines of M. truncatula. They were exposed to two water treatments, well irrigated and drought-stress (33% of field capacity) for a period of 45 days. At harvest, we measured five...

Author(s): Mounawer Badri, Soumaya Arraouadi, Thierry Huguet and Mohamed Elarbi Aouani

Structural features of a cytoplasmic male sterility source from Helianthus resinosus, CMS RES1

July 2010

  Comparisons in the structural organization of mitochondrial DNA between a cytoplasmic male sterility source from Helianthus resinosus (CMS RES1) and HA89 fertile line have been performed surrounding coxIII and atp9 genes. Differences have also been recognized by PCR analyses between HA89 (CMS RES1) and either HA89 (CMS PET1) or HA89 (CMS MAX1), indicating that the molecular basis of their...

Author(s): F. Ardila, M.  M. Echeverría , R. Rios and R. H. Rodríguez

Variability in sucrose content at grand growth phase in tissues of Saccharum officinarum × Saccharum spontaneum inter-specific hybrid progeny

July 2010

    The variability for sucrose content in existing commercial sugarcane germplasm is not large and hence crosses were made between two Saccharum officinarumclones, ‘Gungera’ (cross I) and ‘Keong’ (cross II) with high sucrose content and a clone of Saccharum spontaneum ‘SES 603’ with low sucrose content. A high sucrose commercial var. CoS 8436 was...

Author(s): Vandana Vinayak, A. K. Dhawan and V. K. Gupta

Combining the yield ability and secondary traits of selected cassava genotypes in the semi-arid areas of Eastern Kenya

July 2010

  Despite the importance of cassava for food security in semi-arid areas of Kenya, there is a lack of information regarding gene action determining yield of local varieties. Therefore the objective of this study was to estimate the combining ability for yield and associated secondary traits by crossing popular local varieties with some varieties from IITA using a NC II mating design. The F1 progenies...

Author(s): Joseph Kamau, Rob Melis, Mark Laing, John Derera, Paul Shanahan and  Eliud Ngugi

Multivariate analysis of genetic divergence in twenty two genotypes of groundnut (Arachis hypogaea L.)

July 2010

  Twenty-two groundnut genotypes collected from different germplasm centers were cultivated in Botanical nursery of the Lagos State University Ojo-Campus during the raining season of 2009. The data collected on 33 characters were subjected to multivariate analysis to study the variability within the genotypes and to determine the efficiency of the methods in classifying genotypes. The first three axes each...

Author(s): Sunday Clement Olubunmi Makinde and Omolayo Johnson Ariyo

Screening rice genotypes for drought resistance in Egypt

July 2010

  A series of experiments were conducted under normal and drought conditions to examine the magnitude of yield response of diverse genotypes to drought stress and to identify traits that may confer drought resistance. Thirty-three local and exotic rice entries including 18 Egyptian genotypes (selected from Fn generation of the breeding for drought tolerance program, Rice Research and Training Center, Egypt),...

Author(s): A. A. Abd Allah, M. H. Ammar and A. T. Badawi

Growth and yield of cucumber (Cucumis sativus L.) as influenced by farmyard manure and inorganic fertilizer

July 2010

  The growth and yield of Ashley variety of cucumber in response to the effect of farmyard manure and inorganic fertilizer NPK 20:10:10 was evaluated at the Teaching and Research Farm of the Ambrose Alli University, Ekpoma, Nigeria Lat 6°45’N and long 6°08’E. The farmyard manure was applied at the rates of 0, 5 and 10 t/ha and the inorganic fertilizer at 0, 100, 200, 300 and 400 kg/ha. The...

Author(s): E. K. Eifediyi and S. U. Remison

Tn5 tagging biomonitoring of Rhizobium inoculants

June 2010

  Sinorhizobium freddi R0132, which forms nitrogen fixing nodules in association with Vigna radatia L. and fix nitrogen symbiotically, was the bioinoculant used in this study. Drug resistant S. freddi R0132::Tn5 remained constant at 40°C higher levels temperature for about 35 days (5 weeks) from the date of inoculation in solarzied and autoclaved biomanure VC-MA. The Tn5...

Author(s):   T. Neeraj, Sachin, S. S. Gaurav and S. C. Chatterjee    

Variation in streptomycin-induced bleaching and dark induced senescence of rice (Oryza sativa) genotypes and their relationship with yield and adaptability

June 2010

  Variation in streptomycin sensitivity and dark sensitivity of 36 rice genotypes of 3 different maturity groups was studied. Streptomycin sensitivity and dark sensitivity of rice genotypes were expressed in terms of bleaching index (BI) and senescence index (SI) respectively. Genotypes of each maturity group showed wide variation in their BI / SI value. The objective of this investigation was to find...

Author(s): S. Das, R. C. Misra, S. K. Sinha and M. C. Pattanaik

Biplot analysis of grain yield in barley grown under differing management levels in years of contrasting season-end drought

June 2010

  Variance analysis and graphical biplots were used to understand the nature of genotype × environment interaction (G × E) in a grain yield data set obtained from 39 barley (Hordeum vulgare L.) genotypes grown in 18 environments (a combination of three sowing dates, two crop protection treatments and three years) at Holetta, central highlands of Ethiopia. Genotype × year interaction was...

Author(s): Woldeyesus Sinebo, Berhane Lakew and Abraham Feyissa

Molecular markers for Capsicum frutescens varieties cultivated in Borneo

June 2010

  This paper describes the isolation and characterization of microsatellite loci inCapsicum frutescens varieties cultivated in Borneo, Malaysia. A total of 58 putative microsatellites distributed across 29 sequences were isolated from a genomic library enriched for microsatellites. Ten locus specific polymorphic molecular markers were developed and applied to determine the levels of genetic diversity...

Author(s): K. F. Rodrigues and H. K. Tam

Multivariate analysis of agronomic and quality traits of hull-less spring barley (Hordeum vulgare L.)

May 2010

  A study was conducted to characterize a world collection of hull-less barley using multivariate traits. Significant variations were observed among genotypes in grain yield and grain physical characteristics. Genotypic as well as environmental effects were important for the variations occurred in chemical contents. Total phenolic content ranged from 166.0 to 295.0 mg/100 g ferulic acid equivalent. The total...

Author(s): Firdissa Eticha, Heinrich Grausgruber and Emmerich Berghoffer

Cry 1Ac levels and biochemical variations in Bt cotton as influenced by tissue maturity and senescence

May 2010

  Quantification of Cry 1Ac protein in two field-grown Bt (Bacillus thuringiensis) cotton hybrids (MECH-184, RCH-2) was performed in relation to tissue maturity. Leaves of upper, middle and lower canopies and in bolls and bracts attached to the plant were chosen. Similar measurements were also made in fully mature tagged leaves attached to plants in the upper canopy and excised leaf discs. The leaf discs were...

Author(s):   S. Poongothai, R. Ilavarasan and C. M. Karrunakaran

Genetic variability among forty-three cassava genotypes in three agro-ecological zones of Nigeria

May 2010

  Forty-three cassava genotypes were evaluated to assess genetic variability for root yield and its components at three locations (Ibadan, Mokwa and Onne) in Nigeria, during 2004 - 2005 cropping season. Data were collected for cassava mosaic disease (CMD), cassava bacterial blight (CBB), sprouting, plant height, root number, root weight, shoot weight and root dry matter. Genotype x location interaction was...

Author(s): M. G. Akinwale, B. O. Akinyele, A. G. O. Dixon and A. C. Odiyi

Genotype x environment interactions and heritability of quantitative resistance to net blotch in Tunisian barley

May 2010

  A doubled-haploid barley population derived from a cross between the Tunisian cultivar ‘Roho’ and the local line ‘90’ was used to assess the genotype x environment interaction, heritability estimates and correlations between disease parameters of net blotch resistance at adult growth stage in three environments. Net blotch reaction was evaluated using the mass disease index, the area...

Author(s): M. Cherif, S. Rezgui, P. Devaux  and M. Harrabi

Genetic diversity and linkage disequilibrium of two homologous genes to maize D8: Sorghum SbD8 and pearl millet PgD8

May 2010

  Yield and yield stability of sorghum [Sorghum bicolor (L.) Moench] and pearl millet [Pennisetum glaucum (L.) R.Br.] are highly influenced by flowering time andphotoperiodic sensitivity in the arid to semi-arid regions of West and Central Africa.Photoperiodic sensitivity is the key adaptation trait of local landraces because it assures flowering at the end of the rainy season,...

Author(s): Yongle Li, Sankalp Bhosale, Bettina I. G. Haussmann, Benjamin Stich, Albrecht E. Melchinger and Heiko K. Parzies

Correlation and path coefficient analyses in sunflower

May 2010

  Correlation and path coefficient analysis were studied in twenty four diverse genotypes of sunflower in order to understand the relationship and contribution on eight characters towards the grain yield. The yield kg per plant exhibits highly significant and positive correlation with number of seeds per head, head length in diameter and 1000-seed weight at both genotypic and phenotypic level. Path coefficient...

Author(s): Abrar Yasin B and Shubhra Singh

Assessment of dissimilar gamma irradiations on barley (Hordeum vulgare spp.)

April 2010

  Hordeum vulgare (barley), is an important agricultural crop for food, feed and also has been used virtually worldwide as a model plant for biological research. It is a diploid crop with a low chromosome number (2n = 14) and targeted as a proper crop for intense research on mutagenesis, mutagens and mutants (Khattak and Klopfenstein, 1989). Recently, heavy-ion beams have been used as novel and efficient...

Author(s): S. Sarduie-Nasab⊃, G. R Sharifi-Sirchi⊃ and M. H. Torabi-Sirchi⊃

Genetic and environmental correlations between bean yield and agronomic traits in Coffea canephora

April 2010

Early identification and selection of genotypes with high yielding potential is a main breeding objective of Coffea canephora. Eighteen genotypes of C. canephora were assessed in three diverse environments over a 9-years period from 1996 to 2005. Genetic and environmental associations were assessed among 10 vegetative and five reproductive traits and yield. Genetic associations between yields over seven...

Author(s): Anim-Kwapong Esther and Boamah Adomako

Behavioural pattern of upland rice agronomic parameters to variable water supply in Nigeria

April 2010

  The response of rice crop to water application is of paramount importance to researchers as it helps in determining its agronomic development. The study was aimed at establishing the agronomic responses of rice crop to differential water supply. A two-year dry season experiment was conducted at the research farm of International Institute of Tropical Agriculture, IITA Ibadan, Nigeria. Two upland rice...

Author(s): Christopher O. Akinbile

Estimation of genetic divergence among some cotton varieties by RAPD analysis

March 2010

Total genomic DNA from 15 cotton varieties were analysed to evaluate genetic diversity among them through random amplified polymorphic DNA (RAPD) analysis, with 30 random decamer primers using the polymerase chain reaction (PCR). A total of 370 bands were observed, with 12.3 bands per primer, of which 91.6% were polymorphic. OPM-16 produced the maximum number of fragments while the minimum number of fragments was...

Author(s): L. Chaudhary, A. Sindhu, M. Kumar, R. Kumar and M. Saini

Evaluation of intra- and inter-specific rice varieties adapted to valley fringe conditions in Burkina Faso

March 2010

  The immense potential of the lowlands in Burkina Faso for durable intensification of rice cropping have not been realised due to biotic and abiotic stress constraints.To this end, the rice research program in Burkina Faso evaluated 16 intra-and inter-specific lowland progenies in 2002 and 2003. The aim of the study is to introduce new lowland NERICAs through a participatory approach and to identify ideotypes...

Author(s): M. Sié, S. A. Ogunbayo, D. Dakouo, I. Sanou, Y. Dembélé, B. N’dri, K. N. Dramé, K. A. Sanni, B. Toulou and R. K. Glele

Studies on effectiveness and efficiency of gamma rays, EMS and their combination in soybean [Glycine max (L.) Merrill.]

March 2010

  Mutagenic effectiveness and efficiency of gamma rays, EMS and combined treatments was studied in terms of M2 (progenies) lethality and chlorophyll mutations in two cultivars of soybean (Pusa-16 and PK-1042). In general the frequencies of chlorophyll mutations were high in gamma rays and combined treatments. Four types of mutants viz., albina, xantha, chlorine and viridis were observed in the...

Author(s): Mudasir Hafiz Khan and Sunil Dutt Tyagi

Epistasis and genotype-by-environment interaction of grain yield related traits in durum wheat

February 2010

Genetic control of the number of heads per plant, spikelets per spike and grains per spike was studied in two durum wheat (Triticum durum Desf.) crosses, Inrat 69/Cocorit71 and Karim/Ben Bechir, respectively. Separate analyses of gene effects were done using means of four generations (parents P1 and P2, F1, F2, and the two reciprocal BC1) at two sites. A three-parameter model was inadequate to explain all...

Author(s): Bnejdi Fethi and El Gazzah Mohamed

Effect of pre-treatment on isolated microspores culture ability in durum wheat (Triticum turgidum subsp. durum Desf.)

February 2010

The production of double haploids through androgenesis is used by breeders to produce homozygous lines in a single generation. Androgenesis can be achieved by isolated microspore culture, which, however, allows the production of green haploids with a very low efficiency. In order to improve the overall green haploid regeneration in durum wheat, we compare the efficiency of eight different...

Author(s): O. Slama Ayed, J. De Buyser, E. Picard, Y. Trifa and H. Slim Amara

Physicochemical and functional characteristics of cassava starch in Ugandan varieties and their progenies

January 2010

  Due to poor root quality traits in improved, disease resistant cassava (Manihot esculenta Crantz.)  varieties and hence low acceptability among farmers, a study was undertaken to improve these varieties by crossing them with disease susceptible, farmer preferred local landraces. Five improved varieties and four local landraces were used and hybridisations among them were made in a poly-cross nursery...

Author(s): Ephraim Nuwamanya, Yona Baguma, Naushad Emmambux, John Taylorand Rubaihayo Patrick

Pollen behaviour and fertililization impairment in Bambara groundnut (Vigna subterrenea [L.] Verdc.)

January 2010

  Two field experiments were conducted in April and August, 2007 cropping season at the Department of Crop Science research farm, University of Nigeria, Nsukka, to evaluate the pollen germination potentials and the pollen tube growth of thirteen bambara groundnut cultivars. The harvested pollen grains were exposed for 0, 5, 10 and 15 min durations to ambient conditions before in...

Author(s): Oyiga Benedict Chijioke, Uguru Michael Ifeanyi and Aruah Chinenye Blessing

Sampling strategies for proper quantification of carotenoid content in cassava breeding

January 2010

  Rapid-cycling recurrent selection has been implemented to produce cassava varieties that deliver provitamin A carotenoids to human populations that are affected by vitamin A deficiency. Rapid-cycling  selection relies on quantification in just one plant per genotype. This study was conducted to assess the  reliability of single-plant evaluations and the effect of age of the plant on...

Author(s):   Darwin Ortiz, Teresa Sánchez, Nelson Morante, Hernán Ceballos, Helena Pachón, Myriam C.  Duque, Alba Lucía Chávez and Andrés Felipe Escobar 

Seed germination of java plum (Syzigium cumnii) in three provenances western Kenya

December 2009

    Indigenous fruits are very important as sources of food security, balanced households nutrition. Deforestation poses a serious threat to their survival. Domestication of these trees can be successful only if successful propagation techniques are applied. In Kenya Syzigium cuminii has become a very important indigenous fruit tree for local consumption and income...

Author(s): J. L. Okuto and G. Ouma

The somatic embryogenesis and plant regeneration from immature embryo of sweet corn inbred line

December 2009

    Synthetic seed consisting of somatic embryos enclosed in protective coating are a suitable tool for clonal mass propagation of elite plant varieties. The in vitro study was aimed to evaluate the optimizing medium for sweet corn somatic embryogenesis, synthetic seed production which leads to increasing germination and seed viability percentage. The in...

Author(s):   Pitipong Thobunluepop

Identification and genetic mapping of elongated uppermost internode gene ‘eui’ with microsatellite markers in rice (Oryza sativa L.)

December 2009

  Development of cytoplasmic male sterile (CMS) lines with elongated uppermost internode (EUI) trait is a desirable alternative to eliminate the use of GA3 in hybrid rice production. In this study, a simple and reliable PCR based, simple sequence repeats (SSR) markers was identified, for the eui gene to facilitate marker assisted selection (MAS). A total of 28 SSR markers, mapped in the vicinity of the...

Author(s): Pawan Khera, M. G. Gangashetti, Sukhpal Singh, K. Ulaganathan, H. E. Shashidhar and W. H. Freeman

Breeding for improved organoleptic and nutritionally acceptable green maize varieties by crossing sweet corn (Zea mays saccharata): Changes in quantitative and qualitative characteristics in F1 hybrids and F2 populations

November 2009

    Reports of improvement in sweet corn (Zea mays saccharata) for grain yield and agronomic traits through introgression of genes from the field corn (Zea mays L.) are common in literature. However, few studies have reported improvement in field corn varieties for organoleptic and/or nutritional properties through the transfer of recessive alleles that condition sweetness in...

Author(s): G. Olaoye, O. B. Bello, A. K. Ajani and T. K. Ademuwagun

Optimization and development of regeneration and transformation protocol in Indian mustard using lectin gene from chickpea [Cicer arietinum (L.)]

November 2009

  A simple and easy protocol for regeneration and genetic transformation ofBrassica juncea (L.) Czern and Coss cv. Pusa bold has been developed. The optimum regeneration was found on combination of BAP (3.0 mg/l) and IAA (0.2 mg/l). The genetic transformation protocol has been standardized usingAgrobacterium tumefaciens (gv3101). Cotyledonary petioles used as explant were pre-cultured for 48 h...

Author(s): V. V. Singh, Vandana Verma, Aniruddh K. Pareek, Monika Mathur, Rajbir Yadav, Poonam Goyal, Ajay Kumar Thakur, Y. P. Singh, K. R. Koundal, K. C. Bansal, A. K. Mishra, Arvind Kumar and Sandeep Kumar

Line x tester analysis across locations and years in Sudanese x exotic lines of forage sorghum

November 2009

  Combining ability in forage sorghum [Sorghum bicolor (L.) Moench] was not as much investigated as in grain sorghum. In the present study, 4 local stocks (Testers) and 7 exotic stocks in A3 cytoplasm were crossed in line x tester fashion to investigate combining ability in forage sorghum. The hybrids and their parents were evaluated across two years (2002 - 2003) and at two locations in Khartoum...

Author(s): Maarouf I. Mohammed

Grain yield and yield components of maize (Zea mays L.) as affected by crude oil in soil

November 2009

  A field experiment on the effect of crude oil levels: 0.0 (control), 5.2, 10.4, 20.8 and 41.6 ml applied at different stages of growth on maize yield and yield attributes, with a view to making appropriate recommendation to maize growers in the oil producing areas of the Niger Delta, was conducted in Ozoro, Delta State during the 2003 and 2004 cropping seasons. Seven maize varieties: Composite (suwan 1),...

Author(s): O. M. Agbogidi

Decreased row spacing as an option for increasing maize (Zea mays L.) yield in Trans Nzoia district, Kenya

October 2009

  Maize yield trend has been declining in recent past. Farmers in Trans Nzoia District rarely intercrop maize with other crops like beans. With good nutrition and favourable weather conditions, decreased maize row spacing can maximise maize production per unit land area by increasing plant population density, optimal light interception and nutrient uptake. The experiment was carried out during the long rain...

Author(s): Owino Charles Onyango

Comparison of predicted responses to three types of recurrent selection procedures for the improvement of a maize (Zea mays L.) population

October 2009

  A maize population was subjected to three different selection procedures to determine the best method for its improvement in a study conducted at Ibadan, Nigeria. Considerable genetic variability existed within the population for effective selection for each of the traits considered, using any of the procedures namely full-sib, half-sib and S1 family selection. Heritability estimates were from moderate to...

Author(s): S. O. Ajala, C. E. Ago and G. Olaoye

Super nitro plus influence on yield and yield components of two wheat cultivars under NPK fertilizer application

October 2009

    To evaluate the beneficial impact of biological and chemical fertilizers application on wheat (Triticum aestivum) some yield characters were investigated. Our objective in this study was the interactive effects of biofertilizer (BF) and chemical fertilizer (CF) applications on: quantity yield at Iran in 2006. In this respect, the experimental unit...

Author(s): Rouhollah Rouzbeh, Jahanfar Daneshian, and Hossein Aliabadi Farahani

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