Measurement of Genetic Diversity Among Several Inbred Sunflower (Helianthus Annuus L.) Lines PDF Download
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Author: Michael Lynn Kirsch
Publisher:
ISBN:
Category : Heterosis
Languages : en
Pages : 218
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Book Description
Author: Michael Lynn Kirsch
Publisher:
ISBN:
Category : Heterosis
Languages : en
Pages : 218
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Book Description
Author: K. Kamuraiah
Publisher:
ISBN:
Category :
Languages : en
Pages : 108
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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: Tertia Elizabeth Erasmus
Publisher:
ISBN:
Category : Crops
Languages : en
Pages : 131
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Book Description
Author: Melaku Ayele Gedil
Publisher:
ISBN:
Category : Sunflowers
Languages : en
Pages : 238
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Book Description
The level of polymorphisms of many biochemical and DNA markers are low in cultivated sunflower (Helianthus annuus L.). The number of mapped public DNA markers is limited. Molecular markers have not been developed for the most important diseases of sunflower, such as downy mildew. The objectives of this study were (i) to help alleviate the problem of low DNA marker polymorphisms by developing simple sequence repeat (SSR) markers, (ii) to build an integrated AFLP-RFLP linkage map by using previously described probes and newly developed AFLPs, and (iii) to clone and characterize candidate disease resistance genes. Forty-four polymorphic SSR markers were developed from a genomic DNA library. Diversity analysis of these SSRs for variability among 10 public inbred lines produced an average of 1.86 alleles per locus and mean heterozygosity of 0.21. The number of alleles ranged from 1 to 5. Trinucleotide SSRs were less polymorphic than dinucleotide and mononucleotide SSRs. Cluster analysis and multidimensional scaling separated elite inbred lines from wild species. There was more polymorphism in wild species than in elite lines. Three hundred and six AFLP markers were developed using 18 primer combinations. Two sets of previously mapped RFLP markers were tested for segregation in an F2 mapping population. A total of 401 markers were assigned to 17 linkage groups covering 1326 cM with a mean spacing of 3.3 cM between adjacent markers. The RFLP markers were well spaced and well distributed throughout the genome. Some linkage groups are sparsely populated with common markers. There were two gaps of 30 or more cM in two linkage groups. We cloned candidate disease resistance genes for downy mildew resistance based on sequence homology among resistance genes in other species. Eleven unique nucleotide binding sequence (NBS) containing clones were isolated and showed similarity to the corresponding domains of cloned disease resistance genes in other plant species. Seven clones mapped to four linkage groups and identified nine loci. A cleaved amplified polymorphic sequence (CAPS) marker that was 3.7 cM from the Pl1 resistance gene was developed by analysis of NILs. This CAPS marker should facilitate marker-assisted selection in sunflower.
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.
![Evaluation of Genotypes Fpr Genetic Diversity and Selection Parameters in Sunflower (Helianthus Annuus L.) [With CD Copy] PDF](https://books.google.com/books/content/images/frontcover/0UsrrgEACAAJ?fife=w80-h100)
Author: Reena Rani
Publisher:
ISBN:
Category :
Languages : en
Pages : 58
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Book Description
Author: K. V. Satyanarayana
Publisher:
ISBN:
Category :
Languages : en
Pages : 132
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Book Description
Author: Mark Kevin Mancl
Publisher:
ISBN:
Category :
Languages : en
Pages : 128
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Book Description
Author: Juan Ignacio Arribas
Publisher: Nova Science Publishers
ISBN: 9781631173479
Category : Sunflowers
Languages : en
Pages : 0
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Book Description
This book presents a broad number of recent discoveries, advances and important results concerning sunflower (Helianthus annus) crops and its related fields, with emphasis on the detailed study of several diseases and pests that can affect sunflowers (production, water resources needed, economy impact) in different regions of the globe, including Russia, both North and South America, Africa, India and Europe. We are all well aware of the increasing importance, as well as the economic impact that these plants have reached in recent years, not only in the food industry but also in the western energy market, with the increasing use of sunflower oil as a natural energy resource for biodiesel and biofuel. Apart from the interesting recent advances, results and conclusions presented in every chapter, plenty of visual and graphical content comprised of tables, charts, graphs, pictures and high quality detailed photographs and images showing different issues and problems regarding sunflower crops are also included. The manuscript chapters have been authored by experts in the field and in addition all of them underwent a stringent peer review process by expert reviewers to assure a high final scientific quality.
