Genetic Analysis of Yielding and Its Components in Bread Wheat (Triticum Aestivum L.) Under Different Moisture Stress Conditions PDF Download
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Author: V. Kant
Publisher:
ISBN:
Category :
Languages : en
Pages : 107
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Author: V. Kant
Publisher:
ISBN:
Category :
Languages : en
Pages : 107
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Author: Jichun Tian
Publisher: Springer
ISBN: 9401773904
Category : Technology & Engineering
Languages : en
Pages : 550
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Book Description
The book mainly describes the QTL mappings and efficacy analyses that are associated with wheat productivity, quality, physiology and various stress resistances and provides summaries of results from studies conducted both at home and abroad. It presents comparable data and analyses, helping readers to arrive at a more comprehensive understanding of the latest development in this field. The book provides a wealth of novel information, broad range of applications and in-depth findings on crop genetics and molecular breeding, making it valuable not only for plant breeders but also for academic faculties, senior researchers and advanced graduate students who are involved in plant breeding and genetics. Dr. Jichun Tian is a professor at the Department of Agronomy, Shandong Agricultural University, Tai’an, China.
Author: Sindhu Sareen
Publisher: Frontiers Media SA
ISBN: 2832518311
Category : Science
Languages : en
Pages : 170
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Author: R. B. Yadav
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
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Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 836
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Author: Yasunari Ogihara
Publisher: Springer
ISBN: 4431556753
Category : Science
Languages : en
Pages : 421
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Book Description
This proceedings is a collection of 46 selected papers that were presented at the 12th International Wheat Genetics Symposium (IWGS). Since the launch of the wheat genome sequencing project in 2005, the arrival of draft genome sequences has marked a new era in wheat genetics and genomics, catalyzing rapid advancement in the field. This book provides a comprehensive review of the forefront of wheat research, across various important topics such as germplasm and genetic diversity, cytogenetics and allopolyploid evolution, genome sequencing, structural and functional genomics, gene function and molecular biology, biotic stress, abiotic stress, grain quality, and classical and molecular breeding. Following an introduction, 9 parts of the book are dedicated to each of these topics. A final, 11th part entitled “Toward Sustainable Wheat Production” contains 7 excellent papers that were presented in the 12th IWGS Special Session supported by the OECD. With rapid population growth and radical climate changes, the world faces a global food crisis and is in need of another Green Revolution to boost yields of wheat and other widely grown staple crops. Although this book focuses on wheat, many of the newly developed techniques and results presented here can be applied to other plant species with large and complex genomes. As such, this volume is highly recommended for all students and researchers in wheat sciences and related plant sciences and for those who are interested in stable food production and food security.
Author: Dion Bennett
Publisher:
ISBN:
Category : Plants
Languages : en
Pages : 280
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Book Description
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.
Author: Hassan Auda Awaad
Publisher: Springer Nature
ISBN: 303081873X
Category : Technology & Engineering
Languages : en
Pages : 320
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This book consists of 10 Chapters in 4 Parts. The first Part is an introduction and contains Chapter 1 to introduce the book chapters to the audiences. The second Part consists of two chapters under the name, Impact of Climate Change on Crop Production and the Physiological and Biochemical Basis for Crops Tolerance. The Chapter 2 focus on critical periods of crop plants to stress conditions and the expected impacts of climate changes mainly on the productivity and quality of field crops. While, Chapter 3 highlights the foundations of crop tolerance to environmental stress and plant traits relevant to stress tolerance. It is devoted to explain and discuss mechanisms of adaptation to environmental stress conditions and addresses various plant traits related to stress environmental tolerance i.e. phenological, morpho-physiological and biochemical traits which could be used as selection criteria for crops improvement. The third Part consists of 5 Chapters under the theme “Improve Crop Adaptability and Stability to Climate Change and Modern Technology". Chapter 4 highlights the most important strategic food grain crop (wheat), Chapter 5 focuses the important staple food crop (rice), while Chapter 6 deals with one of the most important food legume crops (faba bean). Chapter 7 and 8 discuss two important oil crops (sesame and sunflower). However, Chapter 9 focuses on cotton as one of the most important fiber crops. The author addresses these crops under the following headings: genotype x environment interaction and its relation to climatic change on yield production, performance of genotypes in response to environmental changes, adaptability and yield stability to environmental conditions, additive main effects and multiplicative interaction model, gene action, genetic behavior and heritability for traits related to environmental stress tolerance, role of recent approaches, biotechnology and nanotechnology. This is besides how can measure sensitivity of genotypes to environmental stress, and finally the appropriate agricultural practices to mitigate environmental stress on crops under attention. The book ends with Chapter No. 10 where the author presents an update of the book topics, present the most important conclusions and recommendations from all chapters. This book has been prepared and supported by recent references and statistics with coloured tables and illustrations for audiences interested in crop science,environment, plant breeding, genetics and biotechnology, as well as postgraduate students and researchers in universities and research centres.
Author: Karansher Singh Sandhu
Publisher: Frontiers Media SA
ISBN: 2832529615
Category : Science
Languages : en
Pages : 657
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Author: Rudi Appels
Publisher: Sydney University Press
ISBN: 192089909X
Category : Science
Languages : en
Pages : 406
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Book Description
The papers herein are volume 2 of the proceedings of the 11th International Wheat Genetics Symposium, held in Brisbane, Australia, in 2008. The series presents the science of the genetic sciences applied to bread and durum wheats and other species.
