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Developing a common bean core collection suitable for association mapping studies
- Source :
- Genetics and Molecular Biology, Vol 38, Iss 1, Pp 67-78 (2015)
- Publication Year :
- 2015
- Publisher :
- Sociedade Brasileira de Genética, 2015.
-
Abstract
- Because of the continuous introduction of germplasm from abroad, some collections have a high number of accessions, making it difficult to explore the genetic variability present in a germplasm bank for conservation and breeding purposes. Therefore, the aim of this study was to quantify and analyze the structure of genetic variability among 500 common bean accessions to construct a core collection. A total of 58 SSRs were used for this purpose. The polymorphism information content (PIC) in the 180 common bean accessions selected to compose the core collection ranged from 0.17 to 0.86, and the discriminatory power (DP) ranged from 0.21 to 0.90. The 500 accessions were clustered into 15 distinct groups and the 180 accessions into four distinct groups in the Structure analysis. According to analysis of molecular variance, the most divergent accessions comprised 97.2% of the observed genetic variability present within the base collection, confirming the efficiency of the selection criterion. The 180 selected accessions will be used for association mapping in future studies and could be potentially used by breeders to direct new crosses and generate elite cultivars that meet current and future global market needs.
Details
- Language :
- English
- ISSN :
- 16784685 and 14154757
- Volume :
- 38
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- Genetics and Molecular Biology
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.b771f82bbe924877a53726b638241d9a
- Document Type :
- article
- Full Text :
- https://doi.org/10.1590/S1415-475738120140126