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Author: Mian Abdur Rehman Arif
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This study was undertaken to map quantitative trait loci (QTLs) and marker trait associations (MTAs) controlling seed longevity and dormancy in wheat using one bi-parental and two association mapping populations. QTL analysis of bi-parental 'International Triticeae Mapping Initiative' population reproduced in two different seasons resulted in the identification of one major and nine minor QTLs for seed longevity. There was one major QTL for dormancy observed on chromosome 4AL. The location of this QTL does not match with any of the longevity QTLs. One set of 96 winter wheat accessions (advanced gemplasm collection) and one set of 183 accessions consisting of a mixture of spring and winter wheat (genebank collection) revealed 73 and 340 MTAs for seed longevity, respectively. Of the 340 MTAs, 134 MTAs were observed after long term cold storage but the others after experimental ageing in genebank collection. The associations were distributed over all the wheat chromosomes except 4D which was not covered with markers. Results obtained after long term cold storage and experimental ageing did match only to some extent in this study which could be due to different quality of seeds produced during different seasons. However, it also can be proposed that different mechanisms are involved during deterioration in cold storage over long periods and decaying during artificial ageing treatments. For dormancy, there were 68 and 118 MTAs identified in the advanced germplasm collection and genebank collection, respectively, in addition to one major QTL on chromosome 4A in the ITMI population. Similarly, pre-harvest sprouting revealed 32 and 193 MTAs in case of advanced germplasm collection and genebank accessions, respectively. Co-linearity was found among wheat, rice and barley for loci influencing dormancy and PHS.
Author: Mian Abdur Rehman Arif
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This study was undertaken to map quantitative trait loci (QTLs) and marker trait associations (MTAs) controlling seed longevity and dormancy in wheat using one bi-parental and two association mapping populations. QTL analysis of bi-parental 'International Triticeae Mapping Initiative' population reproduced in two different seasons resulted in the identification of one major and nine minor QTLs for seed longevity. There was one major QTL for dormancy observed on chromosome 4AL. The location of this QTL does not match with any of the longevity QTLs. One set of 96 winter wheat accessions (advanced gemplasm collection) and one set of 183 accessions consisting of a mixture of spring and winter wheat (genebank collection) revealed 73 and 340 MTAs for seed longevity, respectively. Of the 340 MTAs, 134 MTAs were observed after long term cold storage but the others after experimental ageing in genebank collection. The associations were distributed over all the wheat chromosomes except 4D which was not covered with markers. Results obtained after long term cold storage and experimental ageing did match only to some extent in this study which could be due to different quality of seeds produced during different seasons. However, it also can be proposed that different mechanisms are involved during deterioration in cold storage over long periods and decaying during artificial ageing treatments. For dormancy, there were 68 and 118 MTAs identified in the advanced germplasm collection and genebank collection, respectively, in addition to one major QTL on chromosome 4A in the ITMI population. Similarly, pre-harvest sprouting revealed 32 and 193 MTAs in case of advanced germplasm collection and genebank accessions, respectively. Co-linearity was found among wheat, rice and barley for loci influencing dormancy and PHS.
Author: Russell D. Freed
Publisher:
ISBN:
Category : Dormancy in plants
Languages : en
Pages : 150
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Book Description
Author: J. W. Bradbeer
Publisher: Springer Science & Business Media
ISBN: 1468477471
Category : Science
Languages : en
Pages : 155
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Book Description
The germination of seeds is a magical event, in which a pinch of dust-like material may give rise to all the power and the beauty of the growing plant. The mechanisms of seed dormancy, of the breaking of seed dormancy and of germination itself continue to remain shrouded in mystery, despite the best efforts of plant scientists. Perhaps we are getting there, but very slowly. This book considers germination and dormancy from the point of view of plant physiology. Plant physiologists attempt to understand the relation ship between plant form and function and to explain, in physical and chemical terms, plant growth and development. The place of germination and dormancy in plant ecophysiology is taken into account with attempts to understand the seed in its 'environment, whether the environment be natural, semi-natural or wholly artificial. In due course plant scientists hope to develop a precise understanding of germination and dormancy in cellular and molecular terms, and therefore there is some biochemistry in this book. Biochemists who wish to learn something about seeds should find this book useful.
Author: Geoffrey Graham Fraser
Publisher:
ISBN:
Category : Germination
Languages : en
Pages : 224
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Book Description
Author: Naoto Kawakami
Publisher: Springer Nature
ISBN: 107163965X
Category :
Languages : en
Pages : 194
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Book Description
Author: Kent Bradford
Publisher: John Wiley & Sons
ISBN: 1405173270
Category : Science
Languages : en
Pages : 392
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Book Description
The formation, dispersal and germination of seeds are crucial stages in the life cycles of gymnosperm and angiosperm plants. The unique properties of seeds, particularly their tolerance to desiccation, their mobility, and their ability to schedule their germination to coincide with times when environmental conditions are favorable to their survival as seedlings, have no doubt contributed significantly to the success of seed-bearing plants. Humans are also dependent upon seeds, which constitute the majority of the world’s staple foods (e.g., cereals and legumes). Seeds are an excellent system for studying fundamental developmental processes in plant biology, as they develop from a single fertilized zygote into an embryo and endosperm, in association with the surrounding maternal tissues. As genetic and molecular approaches have become increasingly powerful tools for biological research, seeds have become an attractive system in which to study a wide array of metabolic processes and regulatory systems. Seed Development, Dormancy and Germination provides a comprehensive overview of seed biology from the point of view of the developmental and regulatory processes that are involved in the transition from a developing seed through dormancy and into germination and seedling growth. It examines the complexity of the environmental, physiological, molecular and genetic interactions that occur through the life cycle of seeds, along with the concepts and approaches used to analyze seed dormancy and germination behavior. It also identifies the current challenges and remaining questions for future research. The book is directed at plant developmental biologists, geneticists, plant breeders, seed biologists and graduate students.
Author: A. A. Pickett
Publisher:
ISBN:
Category : Agronomy
Languages : en
Pages :
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Author: Bahman Ehdaie
Publisher:
ISBN:
Category : Germination
Languages : en
Pages : 108
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Book Description
Author: Craig F. Morris
Publisher:
ISBN:
Category :
Languages : en
Pages : 184
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Book Description
Author: Davender Chauhan
Publisher: GRIN Verlag
ISBN: 3640980182
Category : Science
Languages : en
Pages : 8
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Book Description
Research Paper (postgraduate) from the year 2010 in the subject Biology - Botany, grade: None, , course: Doctorate in Seed Science and Technology, language: English, abstract: ABSTRACT: Seed of six varieties of wheat (Triticum aestivum) viz. C-306, PBW-502, WH-542, WH-711, WH-283 and RAJ-3765 were subjected to natural vis-à-vis accelerated ageing conditions and evaluated for relative storage potential of the seeds of respective varieties and ageing conditions. Seeds of all the varieties found 18 months of storability except the variety C-306 in term of minimum seed certification standards (MSCS) for germination percentage. Whereas variety RAJ-3765 was adjudged to have poor storability as it showed 18 months of seed storage potential under ambient conditions. After two years of storage all the wheat varieties loss their germination below minimum seed certification standards (MSCS). Maximum germination percentage retained by variety PBW-502(79.00), considered to have good storability as compared to others whereas minimum germination percentage retained by variety C-306(71.33) found to have poor storability. In case of accelerated aged seed lot maximum germination percentage retained by variety PBW-502(55.00) showed good storability whereas RAJ-3765(44.00) retained minimum germination percentage which showed poor storability among all varieties followed by C-306(47.00). Thus in both conditions natural and accelerated aged seed PBW-502 was adjudged good and RAJ-3765 was as poor storage genotypes. Secondly accelerated aged seed is having poor storability as compare to natural aged seed.
