Journal
MOLECULAR BREEDING
Volume 38, Issue 4, Pages -Publisher
SPRINGER
DOI: 10.1007/s11032-018-0798-x
Keywords
Dry bean; Phaseolus vulgaris; Seed; Minerals; Bioavailability
Categories
Funding
- US Agency for International Development (USAID)
- USDA-ARS
- Feed the Future Innovation Lab for Collaborative Research on Grain Legumes by USAID as part of Feed the Future US Government's global hunger and food security initiative [EDH-A-00-07-00005-00]
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Seed nutrients in legumes are important for human health, particularly in developing countries with heavy reliance on plant-based diets, and among vegetarians in developed nations. Here, we report on our efforts to uncover the genetic basis underlying the phenotypic variation for protein, zinc, calcium concentrations, and iron bioavailability present in 206 accessions of dry bean (Phaseolus vulgaris L.) from the Andean Diversity Panel (ADP). We used 8111 single nucleotide polymorphisms (SNPs) generated with genotyping-by-sequencing (GBS) to examine the allelic variants' associations with seed protein, zinc, and calcium concentrations, and iron bioavailability in the 206 ADP accessions grown over 2 years in Michigan. These efforts identified phenotypic variation among the ADP genotypes for each of the traits, with the highest variation (5.4-fold) found for cooked seed iron bioavailability. In addition, significant SNP-trait associations were found and explained from 6.3 to 13.2% of the phenotypic variation. These results expand the current understanding of the genetic architecture underlying these complex nutritional quality traits and iron bioavailability in dry beans. Furthermore, they have utility for future nutritional quality breeding efforts to better biofortify dry bean through genomics-assisted breeding.
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