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Population structure and evolution o...

Kwak, Myounghai.

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Population structure and evolution of the determinacy gene (fin) during domestication in common bean (Phaseolus vulgaris L.).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Population structure and evolution of the determinacy gene (fin) during domestication in common bean (Phaseolus vulgaris L.)./
作者:	Kwak, Myounghai.
面頁冊數:	202 p.
附註:	Source: Dissertation Abstracts International, Volume: 69-06, Section: B, page: 3387.
Contained By:	Dissertation Abstracts International69-06B.
標題:	Agriculture, Plant Culture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3317941
ISBN:	9780549671688

Population structure and evolution of the determinacy gene (fin) during domestication in common bean (Phaseolus vulgaris L.).
Kwak, Myounghai.

Population structure and evolution of the determinacy gene (fin) during domestication in common bean (Phaseolus vulgaris L.). - 202 p.

Source: Dissertation Abstracts International, Volume: 69-06, Section: B, page: 3387.

Thesis (Ph.D.)--University of California, Davis, 2008.

Determinacy is an agronomically important trait, selecting during or after domestication in common bean (and other crops). In common bean, determinacy is controlled by a recessive gene, fin located on the B1 linkage group. To identify this determinacy gene, sequences homologous to Arabidopsis genes of the photoperiod-dependent and autonomous flowering pathways and meristem-identity genes were amplified by PCR and mapped onto the common bean linkage map using the BAT93 x Jalo EEP 558 and 'Midas' x G12873 recombinant inbred populations. Among three Terminal Flower 1 homologues sequences, PvTFL1y co-segregated with the determinacy locus in the Midas x G12873 recombinant inbred population as well as in a large F2 population (n=1479). Midas, a determinate Andean cultivar, showed a 4.1 kb retrotransposon insertion at the end of the fourth exon in PvTFL1y. Among 319 wild and domesticated common bean accessions, the 117 accessions with this retrotransposon insertion in PvTFL1y were all determinate (73% of determinates). Also, two non-synonymous mutations, three frame-shift mutations and a deletion of the entire coding region were identified in other determinate accessions. With the exception of the retrotransposon insertion haplotype, the different determinate haplotypes had a local distribution. Using a model-based approach implemented in STRUCTURE and applied to a sample of 26 microsatellite markers distributed over the 11 linkage groups, we identified nine populations in the common bean gene pool and characterized these populations by genetic diversity, phylogenetic, and linkage disequilibrium measures. This study showed that common bean population is highly structured. High levels of genome-wide association were observed among the 26 microsatellite loci, strongly suggesting that association mapping should be conducted in separate Andean and Mesoamerican samples. Microsatellite diversity in the Mesoamerican sample showed that the Mesoamerican center of domestication could be located in the Rio Lerma-Rio Grande de Santiago basin in west-central Mexico. Finally, the genetic diversity analysis of PvTFL1y sets the stage for further functional genomics studies to determine differences in gene expression the up- and downstream developmental pathways and associated phenotypes. In turn, this information will assist bean breeders in manipulating growth habit and plant architecture to increase yield for common bean.

ISBN: 9780549671688Subjects--Topical Terms:

1018669
Agriculture, Plant Culture.

Population structure and evolution of the determinacy gene (fin) during domestication in common bean (Phaseolus vulgaris L.).
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