Author: Vikram SinghPublisher:
ISBN:
Category :
Languages : en
Pages : 74
Book Description
Studies on Genetic Variability, Divergence and Character Association in Bread Wheat (Triticum Aestivum L. Em Thell).
New Horizons in Wheat and Barley Research
Author: Prem Lal KashyapPublisher: Springer Nature
ISBN: 9811644497
Category : Technology & Engineering
Languages : en
Pages : 847
Book Description
This book outlines comprehensive information on the global trends, policies, research priorities and frontier innovations made in the research domain of breeding, biotechnology, biofortification and quality enhancement of wheat and barley. With contributions by international group of leading wheat and barley researchers, this book offers data-based insights along with a holistic view of the subject and serve as a vital resource of information for scientists engaged in breeding future high-yielding biofortified varieties. It catalogs both conventional as well as modern tools for gene identification and genome editing interventions for enhancing the yield, grain quality, disease and pest resistance, nutrient-use efficiency and abiotic stress tolerance. The prospects of processing high quality wheat end-products with long term storage and high nutritional quality are also discussed. This book is of interest to teachers, researchers, molecular breeders, cereal biochemists and biotechnologist, policymakers and professionals working in the area of wheat and barley research, food and cereal industry. Also, the book serves as an additional reading material for the undergraduate and graduate students of agriculture and food sciences. National and international agricultural scientists, policy makers will also find this book to be a useful read. Volume 2 of New Horizons in Wheat and Barley Research covers topics in crop protection and resource management.
Nature of Inheritance, Genotype-environment Interaction and Association of Selected Agronomic Characters in Crosses of Winter X Spring Wheats (Triticum Aestivum L. Em Thell)
Author: P. BrajcichPublisher:
ISBN:
Category : Wheat
Languages : en
Pages : 300
Book Description
This investigation was motivated by the apparent increase in genetic variability resulting from the systematic combining of gene pools represented by winter and spring types of wheats. It was the objective of this study to provide information regarding the nature of this genetic variability for nine agronomic characters in populations resulting from winter x spring crosses. Evaluations were made for: 1) the amount of total genetic variability; 2) the nature of the gene action making up this genetic variability using parent-progeny regression and combining ability analysis and 3) possible direct and indirect associations for traits which influence grain yield. Experimental populations which involved parents, Fl, F2 and backcross generations were grown at two locations where a spring and a winter environment could be utilized. At the winter site, the research was evaluated over a two year period. When the two experimental sites were compared, greater genetic diversity was observed at the spring site for maturity date, plant height, tillers per plant, kernel weight and grain yield. At the winter site, heading date, grain filling period, harvest index and kernels per spike were found to have more total genetic variation. From the expected mean square values, it would appear that the winter parents contributed more to the total genetic variation for most traits measured at both locations. A large genotype-location interaction was also noted suggesting that estimates of gene action and selection for adapted plant types can be done only at the specific winter or spring site. A large portion of the total genetic variation controlling the traits measured was due to additive gene action. However, at the winter site there was also a large influence of non-additive gene action associated with heading date, plant height, harvest index, tillers per plant, kernel weight, kernels per spike and grain yield. Of special interest was that at the winter site the most promising parental combinations could be predicted based on the general combining ability effects of the individual cultivars for each trait studied. Such data were not available for the spring site. Consistent and high correlations were observed between tillers per plant, kernels per spike and, to a lesser extent, kernel weight and grain yield at the winter location. Some negative associations were observed at the spring location between these traits and grain yield suggesting that yield component compensations were involved in the final expression of grain yield. The other characters measured did not reflect significant correlations with yield. When the correlation values were considered in terms of direct and indirect effects for specific traits, a large direct effect was noted for the three components and grain yield. The other traits exhibited small or no direct effects on grain yield but did have a slight influence on grain yield through tillers per plant, kernels per spike or kernel weight.
Genetic Diversity and Effects of Selective Intermating on Genetic Variability in Bread Wheat (Triticum Aestivum L. Em. Thell) [With CD Copy]
![Genetic Diversity and Effects of Selective Intermating on Genetic Variability in Bread Wheat (Triticum Aestivum L. Em. Thell) [With CD Copy] PDF](https://books.google.com/books/content/images/frontcover/DYFDuwEACAAJ?fife=w80-h100)
Author: PreetiDissection of the Association of Spike Traits and Grain Yield Attributes in Bread Wheat Genotypes and F1 Hybrids Derived from Line X Tester Mating
Author: R.K YadavaPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The present investigation was undertaken with the objective to evaluate the nature and magnitude of genetic variability and correlation of different spike traits and other character association with grain yield. Eighteen diverse bread wheat (Triticum aestivum L.em Thell.) genotypes and 72 F1 lines were evaluated to estimate the extent of association with respect to spike traits and grain yield. The coefficient for genotypic correlation for most of the character combination was higher in magnitude, as compared to corresponding phenotypic correlation coefficient, indicating largely the strong inherent nature of traits recorded in the present investigation. The yield per plant exhibited positive and strong association with all the traits except with 100 grain weight. From the present investigation, it could be suggested that breeder has to work cautiously for any breeding program aimed at improving particularly the 100 grain weight.
Studies on Genetic Divergence and Character Associations in Bread Wheat
Author: Awanindra Nath DwivediPublisher:
ISBN:
Category :
Languages : en
Pages : 81
Book Description
![Genetic Variability for Some Morpho-physiological Characters Associated with Drought Tolerance in Bread Wheat [Triticum Aestivum L. Em Thell]. PDF](https://books.google.com/books/content/images/frontcover/bZ6ONQEACAAJ?fife=w80-h100)
Author: 
Author: M. S. Khumkar
Author: Sada Ram Verma
Author: Mamta Singh