Plant Breeding Research Papers/Topics

Agro-morphological characterization of horned melon (Cucumis metuliferus) accessions from selected agro-ecological zones in Kenya

Abstract Morphological characterization of genotypes is fundamental in providing information on their genetic status to guide on their conservation and improvement. The objective of this study was to determine agro-morphological diversity within horned melon in Kenya. The study was carried out in two seasons at the University of Embu in Kenya. The study characterized 19 horned melon accessions collected from different agro-ecological zones in Eastern, Central and Western regions in Kenya. Th...

Polyploidy Breeding of African Nightshade ( Solanum section Solanum )

Abstract/Overview The perception of African nightshades ( Solanum section Solanum ) as “healthy” foods, supported by documentation of their high nutri- tional and medicinal benefits, has led to a sudden and steady upsurge in their consumption, demand and monetary value in Africa and most parts of South-East Asia. However, due to very low leaf yields, production of these vegetables remains on small-scales, re sulting in acute shortages and escalating prices, especially in urban areas. ...

Restoration of Male Fertility in Seasonally Dependent Male Sterile Mutant Tomato, Lycopersicon esculentum cv. First

Abstract/Overview The effect of environmental conditions in the spring and autumn on the restoration of male fertility in T-4 male sterile mutant plants which were obtained via gamma (γ)-irradiation of tomato cv. First was investigated. Vegetatively propagated sterile plants gave rise to all male sterile plants in the spring, but the same T-4 plants cultivated under uncontrolled environmental conditions in autumn yielded fertile male. Self-pollination with these fertile males resulted in...

GENETIC VARIABILITY AND ASSOCIATION OF CHARACTERS FOR YIELD AND YIELD COMPONENTS IN SOME FIELD PEA (Pisum sativum L.) GENOTYPES GROWN IN THE CENTRAL HIGHLANDS OF ETHIOPIA

Abstract: Thirty six field pea genotypes were evaluated at two locations in the central highlands of Ethiopia during the 2014 main cropping seasons. The objective of the study was to determine the magnitude of genetic variability and association of characters for yield and yield related traits. The study was conducted using a randomized complete block design with three replications. Data were collected on 15 quantitative traits and subjected to the analysis of variance, correlation and Mahal...

GENETIC VARIABILITY AND ASSOCIATION AMONG YIELD AND YIELD RELATED TRAITS IN SWEET POTATO [Ipomoea batatas (L.) Lam.] ACCESSIONS FROM EAST AND WEST HARARGE

Abstract: Assessing the causes and magnitude of variation is the key to success in crop improvement program. This study was therefore conducted to study the genetic variability and association among yield and yield related traits of [Ipomoea batatas (L.) Lam] accession from East and West Hararge. Accession were planted in 10/4/2020 at Haramaya University Hirna research center, Eastern Ethiopia using Randomized Complete Block Design with three replication and evaluated for 12 agro-morphologic...

GENETIC VARIABILITY FOR YIELD AND YIELD RELATED CHARACTERS IN EARLY TO MEDIAM MATURING YELLOW MAIZE (Zea may s L.) AT CHIRO, ETHIOPIA.

Abstract: Twenty five maize (Zea mays L) genotypes were evaluated in randomized complete block design for genetic variability and association between agronomic traits at Haramaya University at Chiro campus. Data were collected on 20 quantitative traits. The analysis of variance showed that the mean squares due to genotype were highly significant (p

QUANTITATIVE TRAIT VARIATIONS THROUGH CHEMICAL MUTAGENESIS IN SESAME ( Sesamum indicum. L).

Abstract: Sesame (Sesamum indicum L.) is considered to be an ancient oil seed crop to generate high quality edible oil having nutritional and health related value but still at an early stage in breeding. Its chromosome number is 2n=26 and it belongs to the Pedaliaceae family and having significant economic value globally as well as in Ethiopia.With the objective of broadening the gene pool of sesame an experiment was conducted in the genetics and molecular biology laboratory as well as agric...

GENETIC VARIABILITY AND ASSOCIATIONS AMONG YIELD AND YIELD RELATED TRAITS OF CHICKPEA (Cicer arietinum L.) GENOTYPES AT WEST BADEWACHO DISTRICT, HADDIYA ZONE, SOUTH REGIONAL STATE OF ETHIO

Abstract: Chickpea (Cicer arietinum L.) is a mulit important legumes in Ethiopia; however, despite of all the multi benefits of chickpea, its productivity has remained low in Ethiopian agriculture than the attainable yield (5 tons/ha) under improved and good management condition. Reasonable seed yield in chickpea could be achieved by using improved genotypes with appropriate agronomic practices. The investigation of improved genotypes requires a good breeding program, which usually depends o...

GENETIC VARIABILITY AND ASSOCIATION OF TRAITS IN BLACK CUMIN (Nigella sativa L.) AT DEBRE-ZEIT, CENTRAL ETHIOPIA

Abstract: Black cumin (Nigella sativa L.) is an annual spice used for flavoring of food, cosmetics and other industrial products, besides oleoresins and essential oils are valuable sources for health care used for medicinal purposes in Ethiopia. However, variety development was started recently and mainly dependent on introduction of breeding materials. As first step for the improvement of the crop, this study was conducted to assess the genetic variability and to estimate the association of...

PHENOTYPIC DIVERSITY, GENETIC VARIATION AND ASSOCIATION OF MORPHO-AGRONOMIC AND BIOCHEMICAL TRAITS IN OKRA [Abelmoschus esculentus (L.) Moench] GENOTYPES IN ETHIOPIA

Abstract: Okra is considered a minor crop and has not given research attention in Ethiopia. Therefore, a key strategy to adapt to a changing climate is the development and promotion of underutilised crop species. Thus, this research was conducted to assess the genetic diversity, genetic variability, heritability, genetic advance and association of traits of okra genotypes using morpho-agronomic traits and biochemical contents. A total of 36 okra genotypes (27 landraces and 9 introduced comme...

ADOPTION OF IMPROVED POTATO VARIETIES BY SMALLHOLDER FARMERS: THE CASE OF CHILGA WOREDA, NORTH GONDER ZONE, AMHARA REGION, ETHIOPIA

Abstract: Potato is one of most important food crops in the world in general and Ethiopia in particular. However, low productivity of potato is one of the major constraints in potato production in Ethiopia. Encouraging adoption and wider diffusion of potato technologies are important policy measure to address the problem. However, adoption and intensity of adoption of improved potato varieties are constrained by many factors. Hence, in this study an effort was made to evaluate adoption decis...

HARAMAYA UNIVERSITY, HARAMAYA Genetic Variability and Association among Seed Yield and Yield Related Traits in Desi Chickpea (Cicer arietinum L.) Genotypes

Abstract: Evaluation of genotypes for the existence of variations and generation of genetic information is the key step in plant breeding to develop varieties for the targeted area of production. Twenty desi chickpea genotypes were tested in randomized complete block design with three replications. The objectives of the study were to estimate the extent of genotypic and phenotypic variability, estimate the genotypic and phenotypic associations among characters and to estimate the direct and ...

Genetic Variability and Association of Traits in Bread Wheat (TriticumaestivumL.) Genotypes for Drought Tolerance in Middle Awash, Ethiopia

Abstract: Bread wheat is one of the most important cereal crop produced in almost all agro-ecologies of Ethiopia. Assessment of genetic variability in crop species is one of the major activities of plant breeding which helps to design breeding methods of genotypes for further evaluation to meet the diversified goals.Therefore the field experiment was conducted to estimategenetic variability, association of traits, determining their direct and indirect effecton grain yield and to identify pri...

EFFECTS OF INTRA-ROW SETT SPACING AND VARIETIES ON YIELD COMPONENTS, YIELD AND QUALITY OF SUGARCANE (Saccharum officinarum L.) AT KESSEM SUGAR ESTATE, ETHIOPIA

Abstract: Sugarcane production affected by numerous factors, which subsequently reduce cane and sugar yield. Among those constraints, planting geometry is the most important one. To solve the problem, regarding intra-row setts spacing, research findings should be taken. However, research outputs concerning this aspect are not available at Kessem Sugar Estate. Therefore, effects of intra-row setts spacing on selected traits were carried out at this Estate with the objective of determining the...

Effect of organic and inorganic fertilizers on the growth and yield of cucumber (Cucumis sativa L.) in South-South Nigeria

The experiment was conducted at the University of Port Harcourt Teaching and Research farm, Port Harcourt, Rivers State, Nigeria from April to August, 2019  on  the  effects  of  organic  and  inorganic  fertilizers  on  the  growth  and yield  of  cucumber  (Cucumis  sativus  L).  The  research  was  done  in  a randomized complete block design with four treatments and replicated four times. The treatments include control (no application), NPK 15:15:15, spent mushroom ...


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