Putative Quantitative Trait Loci for Physical and Chemical Components of Common Bean

Guzmán-Maldonado, S.H. and Martínez, O. and Acosta-Gallegos, J.A. and Guevara-Lara, F. and Paredes-López, O. (2008) Putative Quantitative Trait Loci for Physical and Chemical Components of Common Bean. Crop Sci. , 43 (3). pp. 1029-1035.

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Abstract

In common bean (Phaseolus vulgaris L.), some nutritional traits such as proteins and mineral content are lower in the cultivated form as compared with the wild counterpart. To assess the feasibility of wild bean as the putative source of desirable traits such as minerals or tannins, this study was performed to identify quantitative trait loci (QTL) associated with seed mass, Ca, Fe, Zn, and tannin content in bean seed. Two-hundred-ninety-one amplified fragment length polymorphism (AFLP) markers were scored in 120 F2:3 segregating individuals derived from a cross between cultivated ‘Bayo Baranda’ and wild common bean accession G-22837. Seed weight and minerals and tannin contents were quantified on the seed harvested from the 120 individual plants. Significant transgressive segregation was observed among the F2:3 individuals for some characteristics. A total of 57 AFLP markers were distributed among five linkage groups with a coverage of 497 centiMorgans (cM). Five putative QTL were significantly associated with seed mass, two with Ca, two with Fe, one with Zn, and four with tannin content in the seed. These QTL explained ≈42, 25, 25, 15, and 42% of the phenotypic variance, respectively. Due to known environmental effect on most nutritional traits, the use of QTL with larger effects could be used to screen segregating populations that include wild genotypes, wild populations, and ancestral landraces from the region where outstanding wild populations are identified.

Item Type: Article
Author Affiliation: Unidad de Biotecnología del Bajío, Campo Experimental Bajío-INIFAP, Km. 6.0 Carretera Celaya-San Miguel Allende, Celaya, Gto., México
Subjects: Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Crop Improvement > Biotechnology
Divisions: Common Bean
Depositing User: Sushil
Date Deposited: 16 Oct 2010 05:21
Last Modified: 21 Oct 2010 03:19
Official URL: http://dx.doi.org/10.2135/cropsci2003.1029
URI: http://eprints.icrisat.ac.in/id/eprint/66

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