Author: R. N. Ganta
Publisher:
ISBN:
Category :
Languages : en
Pages : 91

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Author: Baghyalakshmi Kari
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659623677
Category :
Languages : en
Pages : 116

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Book Description
Genetic diversity of cultivated wheat is narrowing down and is increasingly becoming non-complacent in tackling new pathogenic races and adverse environmental situations. Wild relatives of wheat are rich repositories of beneficial genes that are capable of defying adverse situations. However, these wild species are not readily crossable with cultivated ones. The present study attempted to cross three wild wheat species as females with three cultivated species of varying ploidy to understand the intricate behavior of hybrids in relation to cytology, morphology, and molecular recombination. Triticum monococcum did not produce hybrids in any of the crosses. Various degrees of chromosome anomalies and hybrid sterility were seen with hybrids of T. timopheevi and T. sphaerococcum. G genome from T. timopheevi could enhance more pairing between B and D of cultivated species. Precocity of certain chromosomes in laggard formation was evident, pointing towards evolutionary self balance of the genomes which prevented homeologous pairing. Molecular diversity clearly corroborated with genetic proximity of the species, which distinguished themselves by maintaining the genome homeology.

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: Erika C.H. Meng
Publisher: CRC Press
ISBN: 143984352X
Category : Technology & Engineering
Languages : en
Pages : 207

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Book Description
Scientific breeding in the twentieth century greatly accelerated wheat`s evolution, producing high-yielding varieties that helped avoid famine in many developing countries. Emerging scientific tools hold promise for identifying and tapping new, useful genetic diversity within wheat`s primary and secondary gene pools and, through genetic engineering, beyond.The book describes generally how policies affect wheat genetic diversity; it looks at historical changes in wheat genetic diversity, as policy and priorities have evolved; it identifies factors that explain changes and differences in spatial diversity; and finally, it analyzes the productivity impacts of changes in diversity. Chapters define various types of crop genetic diversity and ways to measure them, framing the definitions and metrics in the contexts for which they are most relevant.

Author: Roderick M. Rejesus
Publisher:
ISBN: 9789686923582
Category : Wheat
Languages : en
Pages : 21

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Book Description

Author: Moshe Feldman
Publisher: Springer Nature
ISBN: 3031301757
Category : Science
Languages : en
Pages : 689

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Book Description
This open access book covers a century of research on wheat genetics and evolution, starting with the discovery in 1918 of the accurate number of chromosomes in wheat. We re-evaluate classical studies that are pillars of the current knowledge considering recent genomic data in the wheat group comprising 31 species from the genera Amblyopyrum, Aegilops, Triticum, and other more distant relatives. For these species, we describe morphology, ecogeographical distribution, phylogeny as well as cytogenetic and genomic features. For crops, we also address evolution under human selection, namely pre-domestication cultivation and domestication. We re-examine the genetic and archeological evidence of where, when, and how domestication occurred. We discuss unique aspects of genome evolution and maintenance under polyploidization, in natural and synthetic allopolyploids of the wheat group. Finally, we propose some thoughts on the future prospects of wheat improvement. As such, it can be of great interest to wheat researchers and breeders as well as to plant scientists and students interested in plant genetics, evolution, domestication, and polyploidy.

Author: Andrew H. Paterson
Publisher: Frontiers Media SA
ISBN: 2832502377
Category : Science
Languages : en
Pages : 204

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Author: Hiro-Yuki Hirano
Publisher: Springer Science & Business Media
ISBN: 3540742506
Category : Technology & Engineering
Languages : en
Pages : 384

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Book Description
There are few more emotive, or important, crops in the world than rice – the staple food for a huge proportion of the world’s population. This volume presents the latest results of research in crop improvement as well as in molecular and cellular activities in rice. It consists of 26 chapters and is divided into the following four sections: Genome-wide and genome-based research; Signal transduction and development; Evolution and ecology; Improvement of rice.

Author: Nader R. Abdelsalam
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659143168
Category :
Languages : de
Pages : 196

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Book Description
A range of cultivars and lines of soft wheat (Triticum aestivum L.) as well as one species of wild wheat. Three parental genotypes representing major wheat cultivars harvested in Egypt and Kazakhstan. Field research was carried out under conditions of Egypt and Kazakhstan throughout three vegetative periods (Kazakhstan, 2007; Egypt, 2007; Kazakhstan, 2008). Morphological characteristics of chosen wild, domesticated and hybrid wheats (F1 and F2); mid-parents heterosis; degree of heritability; molecular genetic characteristic of parents; effect of salt concentrations on wheat parents and their hybrids during germination; grains protein patterns; input of peroxidase enzyme in salt tolerance and effect of Triton on productivity of Egyptian wheat cultivars. The results of present dissertational work may be implied as a material for breeding programmes aimed at obtaining new genetic resources; for obtaining the data on genetic diversity at initial hybridization steps to effective breeding; the results of present dissertation provide for stock database and a set of research measures to conduct further analysis of biochemical and genetic bases for wheat salt tol

Author: Deepak Kumar Yadav
Publisher:
ISBN:
Category :
Languages : en
Pages : 86

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Book Description