Download or read book Genetic Analysis in Bread Wheat Triticum Dosticum L for Yield Yield Attributing Traits and Disease Resistance written by WOYESSA S. G and published by . This book was released on 2002 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stability Analysis of Yield and Yield Attributing Characters of Promising Bread Wheat Triticum Aestivum L Em thell Genotypes With CD Copy written by Vijeta Gupta and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Analysis in Wheat written by Solomon Gelalcha Woyessa and published by LAP Lambert Academic Publishing. This book was released on 2011-09 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic information, especially about the nature of combining ability and type of gene action governing inheritance of important traits are guidelines to a breeder in selecting parents for development of hybrids, varieties and lines. This book is about results of research conducted on non segregating generations (parents and F1s ) and selected segregating (F2) population derived from 12 elite bread wheat (Triticum aestivum L.) genotypes following line by tester mating system. Parameters such as days to flowering and maturity; plant height, number of tillers per plant; peduncle length; spike length; total biomass per plant; number of grains per spike; grain yield per plant; 100-grain weight; and harvest index were analyzed and moreover, rust resistance mechanism was also considered. The objective is to reveal information on extent of heterosis and inbreeding depression; nature of gene action; extent of variability and genetic advance; association of component traits with each other and grain yield; and the way the component traits affect grain yield and finally rust resistance mechanisms. The book is helpful to mid-level researchers and students who seek to know more about wheat.

Download or read book Studies on Methods of Creating Variability and Genetic Analysis of Yield and Its Component Traits in Bread Wheat Triticum Aestivum L em Thell written by Sada Ram Verma and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Analysis of Kernel Traits in Bread Wheat T Aestivum written by Mala Kumari and published by LAP Lambert Academic Publishing. This book was released on 2016-01-14 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bread wheat (Triticum aestivum L.) is one of the most important food crops, feeding about 40 % of the world's population. Genetic improvement in wheat focus on three main areas: enhancing yield, overcoming biotic and abiotic stress and improvement end use quality. Grain size is an important physical indicator of seed quality that affects vegetative growth and is frequently related to yield, market grade factors and harvest efficiency. The grain length, width, and area were associated with a 40% variation in the milling quality of Australian winter wheat cultivars. Grain color is also one of important traits affecting flour yield and quality in wheat. For effective improvement of quality and yield of wheat, a plant breeder must have knowledge of inheritance of quality and agronomic traits.

Download or read book Genetic Analysis of Grain Yield and Related Characters in Bread Wheat T Aestivum L em Thell Under Normal and Stress Environments written by Vijaipal Singh and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guide to Bread Wheat Breeding at CIMMYT written by Maarten van Ginkel and published by CIMMYT. This book was released on 1998 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inheritance of Important Traits in Bread Wheat Using Diallel Analysis written by Inam Ullah and published by LAP Lambert Academic Publishing. This book was released on 2011-01 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bread wheat (Triticum aestivum L. em. Thell) is one of the most important cereal grain crop of the world and is cultivated over a wide range of climatic conditions. For a successful breeding program the inheritance of yield related traits is a pre- requisite. This monograph communicates the inheritance pattern of yield and related traits in bread wheat (Triticum aestivum L.) using 8x8 diallel analyses. Graphical analysis revealed additive gene action for days to heading, days to maturity, plant height, grains per spike, 1000 grains weight and harvest index. While over dominance gene action for flag leaf area, tillers per plant, Spike length and yield per plant. The GCA mean squares were significant for all traits except tiller per plant and yield per plant and were greater than SCA mean squares indicating the preponderance of additive genetic effects. The parents Tkb, Tat, Sarc-3 and SQ- 92 were good general combiners. The parents Tkb , Tat , Sarc-3 and SQ-92 and the specific crosses that showed high mid parent and better parent heterosis are recommended for further use in wheat breeding programmes.

Download or read book Enhancing Efficiency in Wheat Triticum Aestivum L Breeding for Abiotic and Biotic Stress Resistance Using Novel Physiological and Genetic Approaches written by Megan Johanna Lewien and published by . This book was released on 2017 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: By 2050 global demand for wheat (Triticum aestivum L.) is predicted to grow by 60%. To meet this demand, annual genetic gains must increase by 1.4%, and withstand increasing environmental stresses. The goal of the work herein was to use new phenomic, genomic and molecular tools to identify novel genomic regions associated with eyespot (Oculimacula yallundae and O. acuformis) disease resistance, drought tolerance and yield stability. To identify novel genomic regions associated with eyespot resistance in winter wheat, disease susceptibility was evaluated in two PNW winter wheat panels (n= 469, 399) and genome-wide association mapping was conducted. Of the 92 marker trait associations identified, the seven most significant cumulatively reduced eyespot disease response. As breeding lines were used, the results can be used for rapid introgression of resistance alleles into elite lines. The second objective of this work was to evaluate phenotypic associations of physiological traits and yield under rain-fed conditions to identify traits for use in breeding. 700 lines of the spring wheat nested association mapping panel were evaluated for water use efficiency, plant water status, photosynthetic and photoprotective mechanisms and grain yield over three years. Six traits had a cumulative effect on increasing yield: plant water status, plant height, photosynthetic capacity, vegetative green index, water used efficiency and days from sowing to heading. The physiological traits identified can be used to improve selection efficiency and yield stability under variable rain-fed conditions. The third objective of this work was to identify genomic regions associated with the water-use efficiency, plant water status, leaf health and photosynthesis. 650 lines of the spring wheat NAM panel were evaluated for these traits and grain yield under rain-fed conditions and joint inclusive composite interval mapping and genome-wide association analysis was conducted. The seven most significant grain yield QTL identified, located on chromosomes 1A, 1B, 2B, 4B, 5B, and 7B, were found in multiple environments and were associated with multiple physiological traits. This study helps reveal the genetic architecture of drought tolerance and grain yield and can be used to improve the efficiency of breeding under variable water-limited conditions.

Download or read book Stability Analysis of Genotypes with Concern to Yield Performance and Quality Traits in Bread Wheat Triticum Aestivum L With CD Copy written by Ibrahim Hassani and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Genetic Dissection of Drought and Heat Tolerance Related Traits in Bread Wheat Triticum Aestivum L written by Dion Bennett and published by . This book was released on 2012 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was conducted with the aim of improving our understanding of the genetic basis of the superior grain yield of an elite bread wheat breeding line, RAC875, under drought and heat stressed Mediterranean-type climates in southern Australia. Here, these abiotic stresses present a significant barrier to production. Kukri is a locally adapted variety which achieves acceptable grain yield under more favourable conditions, but relatively low grain yields under severe stress. A cross between the two lines resulted in an F1 derived doubled haploid population consisting of 368 individuals. The population was initially used for the genetic dissection of time to ear emergence and flag leaf glaucousness, with the latter trait hypothesised to explain a significant proportion of RAC875's relative drought and heat tolerance. Whilst parents of the population achieved similar time to ear emergence, segregation for Ppd-B1 and Ppd-D1a created large variation for this trait within the population. Two novel minor loci were detected for time to ear emergence (Q.Eet.aww-1A and Q.Zad.aww-4A), in addition to another eight known, minor loci. Five novel loci were detected for flag leaf glaucousness (Q.W.aww-3A, Q.W.aww-3B, Q.W.aww-3D, Q.W.aww-4D and Q.W.aww-5B), with one in particular (Q.W.aww-3A) accounting for up to 52 percent of the genetic variance for this trait. Sixteen field experiments were sown across southern Australia between 2006 and 2010, where average site grain yields ranged from 314 to 5275 kg ha−1. Kernels per square metre was the trait most correlated with grain yield, while spikelet fertility, which had a significant positive correlation with grains per square metre in all experiments and the subsequently derived environment clusters, was also related to grain yield. Nine loci were detected for grain yield independent of time to ear emergence and plant height. Five of these loci co-located with loci for kernels per square metre and only one of these nine loci were associated with any of the loci for flag leaf glaucousness and this genetic effect was opposite (i.e. Kukri allele resulting in large glaucousness value and lower grain yield). The RAC875 allele at QTL on chromosomes 1B and 7A (Q.Yld.aww-1B and Q.Yld.aww-7A-2) was associated with greater grain yield, kernels per spikelet and kernels per square metre. These two loci were detected in environment clusters where heat stress was a differentiating factor and it was concluded that these may therefore be associated with heat stress tolerance. Another QTL of large effect was consistently detected on chromosome 6A (Q.Tkw.aww-6A), with the RAC875 allele positively affecting grain size, flag leaf width and stem water soluble carbohydrate content but resulting in lower kernels per spikelet and therefore kernels per square metre. Experiments were also sown to assess the performance of the population in north-west Mexico under well watered, high yield potential conditions, as well as drip irrigated drought treatment and late planted but well watered conditions to expose the experiments to heat stress. This resulted in three very distinctive treatments and subsequently detected different genetic regions controlling grain yield. Two distinct QTL were detected for grain yield and canopy temperature on chromosome 3B, under irrigated (Q.Yld.aww-3B-1) and irrigated, drought and heat stressed treatments (Q.Yld.aww-3B-2). The latter QTL accounted for up to 22 percent of the genetic variance for grain yield and 20 percent of the genetic variance for canopy temperature under the heat stress treatment. However, all three treatments failed to detect any major QTL of common effect to southern Australia. This study highlighted the complex genetic basis of grain yield and physical grain quality in drought and heat stressed conditions, as well as the importance of conducting QTL dissection in the target environment. However, key loci detected offer potential for marker development and deployment of marker assisted selection within wheat breeding programmes targeting southern Australia. In the longer term, this should help improve the rate of genetic gain for grain yield, increasing production by growers in the Mediterranean type climate of southern Australia.

Download or read book Genetic Diversity Studies for Some Physical and Yield and Its Component Traits in Bread Wheat Triticum Aestivum L Em Thell Under Late Sown Conditions written by M. S. Khumkar and published by . This book was released on 1999 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Analysis of Agronomic and Quality Characters of Bread Wheat Grown Under Saline and Nonsaline Irrigation written by Walter McLean Kelman and published by . This book was released on 1988 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Analysis of Yield and Yield Attributing Characters in Dicoccum Wheat written by HUNAKUNTI MALLESHAPPA A and published by . This book was released on 1997 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Analysis of Bread Wheat written by Muhammad Abdul Rehman Rashid and published by LAP Lambert Academic Publishing. This book was released on 2012-05 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat (Triticum aestivum. L) is an important cereal, used as staple food and a good source of income in different countries. It is providing food to the one third of world s population. Wheat grain is highly venerated for a number of products. To feed the increasing population of world is a great challenge for researchers. The only way to tackle this challenge is to develop new genotypes with good yield potential and to enhance the potential of available genotypes. Breeding strategies for high potential varieties made on the basis of scientific and agronomic knowledge is good way to achieve this goal. Both quality and quantity of grain are important targets to improve. Genetic analysis is one of best tools to exploit the potential of species for application on commercial scale. It will not only enable us to feed humanity but also direct to use natural resources in proper way.

Download or read book Genetic Analysis of Yielding and Its Components in Bread Wheat Triticum Aestivum L Under Different Moisture Stress Conditions written by V. Kant and published by . This book was released on 2005 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Analysis of Segregating Generations for Yellow Rust Resistance in Bread Wheat Triticum Aestivum L Em Thell With CD Copy written by Shipra Gangopadhyay and published by . This book was released on 2018 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: