Genetic Study of Eight Sources of Reduced Plant Height in Sunflower (Helianthus Annuus L.) PDF Download
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Author: Ana Berretta de Berger
Publisher:
ISBN:
Category : Sunflowers
Languages : en
Pages : 220
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Book Description
Author: Ana Berretta de Berger
Publisher:
ISBN:
Category : Sunflowers
Languages : en
Pages : 220
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Book Description
Author: Jorge Eduardo Moutous
Publisher:
ISBN:
Category : Sunflowers
Languages : en
Pages : 102
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Book Description
Author: Jinguo Hu
Publisher: CRC Press
ISBN: 1439840490
Category : Science
Languages : en
Pages : 374
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Book Description
The sunflower has fascinated mankind for centuries. The oilseed sunflower contributes approximately ten percent of the world's plant-derived edible oil and the confection type sunflower holds a considerable share of the directly consumed snacks market. In addition, sunflower is also grown as an ornamental for cut flowers, as well as in home ga
Author: Rishi R. Masalia
Publisher:
ISBN:
Category :
Languages : en
Pages : 292
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Book Description
As sessile organisms, plants are exposed to numerous environmental stresses during their lifetimes. These include challenges related to drought, salinity, and low nutrient availability, all of which can negatively impact plant growth and development and reduce crop yields. Currently, drought and nutrient limitation are offset through increased irrigation and fertilizer application, however, these agricultural inputs are environmentally, economically, and energetically costly. Moreover, irrigation can lead to soil salinization. Attention has thus turned to the development of increasingly resilient crops, but such efforts require knowledge of the mechanistic basis of variation in growth and performance under stress. Here, I describe research aimed at characterizing genetic variation underlying seedling growth traits in cultivated sunflower (Helianthus annuus L.) under well-watered and water-limited (i.e., osmotic stress), as well as the phenotypic and transcriptomic response of such seedlings to multiple water-related stresses as well as nutrient limitation. Genome-wide association studies revealed that cultivated sunflower harbors substantial variation for seedling growth and root-related traits under both well-watered and water-limited conditions, with evidence that many of the significantly associated regions had consistent effects across environments. Moreover, the transcriptomic response to water-related stresses (drought, osmotic, and salt), revealed that over 30% (502/1332) of differentially expressed genes (DEGs) were shared between at least two stresses, with 51 DEGs shared across all three stresses, in either leaf or root tissue. There was an overall bias toward up-regulation of DEGs, particularly in roots, and there were substantially more DEGs in roots vs. leaves. All 51 of the DEGs shared across these three stresses exhibited a common direction of response, and this pattern held for the subset of 26 DEGs that were also shared with low nutrient stress. Under nutrient stress, however, there were substantially more DEGs in leaves vs. roots, though there was a similar bias toward up-regulation. Taken together, these results add to a growing body of data on the genetic basis of phenotypic variation under stress, as well as the phenotypic and transcriptomic response of plants to a variety of abiotic stresses.
Author: Eric Von Hoeft
Publisher:
ISBN: 9781339550589
Category :
Languages : en
Pages :
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Book Description
Exotic germplasm holds considerable promise as a source of novel variation to improve agronomic characters in elite breeding pools where genetic diversity has been limited by selective sweeps in line development or crop domestication. Unfortunately, exotic germplasm typically carries a large number of unfavorable alleles that give rise to linkage drag in segregating populations, making it unsuitable for variety improvement with traditional selection methods. Linkage drag masks the detection of favorable alleles underlying complex agronomic characters by negatively impacting phenotypic performance. Consequently, the exploitation of exotic germplasm has traditionally been limited to the detection and utilization of characters controlled by relatively few alleles with dominant, co-dominant or highly additive gene action. If favorable alleles underlying complex agronomic characters could be detected in exotic germplasm sources, opportunities to exploit them in elite breeding pools through marker-assisted selection or other methods may be improved. An Advanced Inter-mated Recombinant Inbred Line (AI-RIL) population was employed to construct a genetic map and detect QTL underlying complex agronomic characters in four independent testcross populations of sunflower (Helianthus annuus). Testcross hybrids were evaluated for plant height, flowering time, seed harvest moisture, seed test weight, ring count per capitulum and grain yield. Significant QTL for each character were detected in each test cross population independently and across populations by employing the BLUP over testcross datasets. A genome-wide association study was employed to further interrogate marker-trait associations and elucidate candidate genes regulating these characters. Finally, a genomic selection model was developed to predict performance of testcross hybrids based on the estimated allele effects represented in AI-RIL genotypes and to evaluate genomic selection as a tool for the exploitation of favorable alleles from exotic germplasm sources.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 568
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Book Description
Author: Jaroslav Dolezel
Publisher: John Wiley & Sons
ISBN: 3527610936
Category : Science
Languages : en
Pages : 479
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Book Description
Targeted at beginners as well as experienced users, this handy reference explains the benefits and uses of flow cytometery in the study of plants and their genomes. Following a brief introduction that highlights general considerations when analyzing plant cells by flow cytometric methods, the book goes on to discuss examples of application in plant genetics, genomic analysis, cell cycle analysis, marine organism analysis and breeding studies. With its list of general reading and a glossary of terms, this first reference on FCM in plants fills a real gap by providing first-hand practical hints for the growing community of plant geneticists.
Author: Arun Shanker
Publisher: BoD – Books on Demand
ISBN: 9535122509
Category : Technology & Engineering
Languages : en
Pages : 770
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Book Description
The impact of global climate change on crop production has emerged as a major research priority during the past decade. Understanding abiotic stress factors such as temperature and drought tolerance and biotic stress tolerance traits such as insect pest and pathogen resistance in combination with high yield in plants is of paramount importance to counter climate change related adverse effects on the productivity of crops. In this multi-authored book, we present synthesis of information for developing strategies to combat plant stress. Our effort here is to present a judicious mixture of basic as well as applied research outlooks so as to interest workers in all areas of plant science. We trust that the information covered in this book would bridge the much-researched area of stress in plants with the much-needed information for evolving climate-ready crop cultivars to ensure food security in the future.
Author: Enrique Martínez-Force
Publisher: Elsevier
ISBN: 1630670626
Category : Science
Languages : en
Pages : 731
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Book Description
This comprehensive reference delivers key information on all aspects of sunflower. With over 20 chapters, this book provides an extensive review of the latest developments in sunflower genetics, breeding, processing, quality, and utilization; including food, energy and industrial bioproduct applications. World-renowned experts in this field review U.S. and international practices, production, and processing aspects of sunflower. - Presents seven chapters on improving sunflower production with insights on breeding and genetics; physiology and agronomy; common insect and bird pests; mutagenesis; and identifying and preventing diseases. - Summarizes current knowledge of sunflower oil uses in food, oxididative stability, minor constituents, and lipids biosynthesis. - Ideal reference for scientists, researchers, and students from across industry, academia, and government.
Author: Chittaranjan Kole
Publisher: Springer Nature
ISBN: 3030900444
Category : Science
Languages : en
Pages : 300
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Book Description
This book presents deliberations on molecular and genomic mechanisms underlying the interactions of crop plants to the abiotic stresses caused by heat, cold, drought, flooding, submergence, salinity, acidity, etc., important to develop resistant crop varieties. Knowledge on the advanced genetic and genomic crop improvement strategies including molecular breeding, transgenics, genomic-assisted breeding, and the recently emerging genome editing for developing resistant varieties in oilseed crops is imperative for addressing FHNEE (food, health, nutrition, energy, and environment) security. Whole genome sequencing of these crops followed by genotyping-by-sequencing has provided precise information regarding the genes conferring resistance useful for gene discovery, allele mining, and shuttle breeding which in turn opened up the scope for 'designing' crop genomes with resistance to abiotic stresses. The eight chapters each dedicated to a oilseed crop in this volume elucidate on different types of abiotic stresses and their effects on and interaction with the crop; enumerate on the available genetic diversity with regard to abiotic stress resistance among available cultivars; illuminate on the potential gene pools for utilization in interspecific gene transfer; present brief on classical genetics of stress resistance and traditional breeding for transferring them to their cultivated counterparts; depict the success stories of genetic engineering for developing abiotic stress-resistant crop varieties; discuss on molecular mapping of genes and QTLs underlying stress resistance and their marker-assisted introgression into elite varieties; enunciate on different genomics-aided techniques including genomic selection, allele mining, gene discovery, and gene pyramiding for developing adaptive crop varieties with higher quantity and quality of yields, and also elaborate some case studies on genome editing focusing on specific genes for generating abiotic stress-resistant crops.
