Author: James Russell LarkinsPublisher:
ISBN:
Category :
Languages : en
Pages : 102
Book Description
Heritabilities and Interrelationships of Spike Size and Other Traits in Two Winter Wheat Crosses (Triticum Aestivum L. Em Thell)
Author: James Russell LarkinsPublisher:
ISBN:
Category :
Languages : en
Pages : 102
Book Description
Heritability Estimates and Gene Effects for Basal Spikelet Sterility and Other Agronomic Characters in Four Crosses of Winter Wheat (Triticum Aestivum L. Em. Thell.)
Author: Raad Mahmoud SalmanPublisher:
ISBN:
Category : Plant genetics
Languages : en
Pages : 82
Book Description
Agronomy News
Author: Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 712
Book Description
Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.
Heritabilities and Interrelationships of Short-stature and Other Agronomic Characters in the F3 and the F4 Generations of Two Wheat Crosses (Triticum Aestivum, L. Em. Thell)
Author: Moravapalle Venkataramana ReddiPublisher:
ISBN:
Category :
Languages : en
Pages : 112
Book Description
Heritability and Interrelations of Yield and Yield-related Traits in a Hard Red Winter Wheat Cross (Triticum Aestivum L.)
Author: Raymond Joseph SidwellPublisher:
ISBN:
Category :
Languages : en
Pages : 180
Book Description
Heritability and Interrelations of Yield, Yield-related Traits, and Post Flowering Morphology in Three Hard Red Winter Wheat Crosses (Triticum Aestivum L.)
Author: Mohamed Ali AlhagiGenetics Abstracts
Author: Plant Breeding Abstracts
Author: Use of Combining Ability Estimates to Identify the Genetic Potential of Selected Winter Parental Lines (Triticum Aestivum L.em Thell)
Author: Muhammad Shahid MasoodPublisher:
ISBN:
Category : Winter wheat
Languages : en
Pages : 340
Book Description
A major factor limiting the efficiency of plant improvement programs is the lack of knowledge as to which parental combinations to make when working with quantitatively inherited traits. The primary objective of this study was to provide information regarding the use of combining ability analysis to predict which cross combinations would result in the greater frequency of desirable segregates. Five winter wheat parents were used to develop a 5x5 diallel cross. Over a two year period parents, Fl, F2, F3, and F4 generations involving top cross populations were evaluated. Information was collected on an individual plant basis for seven traits: plant height, tiller number, spike length, spikelets per spike, biological yield, grain yield, and harvest index. Griffing's (1956) model 1, method 2 was used to estimate GCA and SCA in Fl and later generations. Narrow-sense heritability estimates were computed using regression in standard units across generations. Significant GCA estimates were obtained for most traits in all generations with the exception of tiller number and grain yield in the Fl during 1986-87. Specific combining ability estimates were also found to be important for all traits, except spikelets per spike in the Fl and F3 generations. High GCA to SCA ratios indicated a preponderance of additive gene action. Exceptions to the trend were grain yield and tiller number in the Fl during 1986-87. Low GCA and narrow-sense heritability estimates suggest that selection for these two traits would have to be delayed until later generations. When considered over generations, both GCA and SCA estimates were found to be significant. Significant SCA over generations indicated the presence of additive x additive epistasis. The GCA effects contributed by a particular parent were consistent over all generations indicating that F2 and F3 generations can be used effectively for combining ability analysis. However, the results did suggest that GCA estimates were more influenced by the environment than SCA. For the traits measured and in the populations used in this study, GCA effects did predict the best parental combinations for obtaining the highest percentage of desirable progeny in segregating populations.
Heritability and Interrelationships of Yield, Yield Components and Other Agronomic Characters in the F2 Generation of a Wheat Cross (Triticum Aestivum L.).
Author: Jaime Angel GonellaPublisher:
ISBN:
Category : Wheat
Languages : en
Pages : 110
Book Description