INHERITANCE OF SEED PHOSPHORUS AND SEED PHYTATE CONTENT IN A RECOMBINANT INBRED LINE POPULATION OF COMMON BEAN

摘要

Phytates are an important anti-nutritional component of legume seeds because they chelate mineral uptake in human digestion. Phytates can also bind certain charged proteins making them less digestible as well and the lack of phytase production in monogastric digestive systems prevents phytates from being hydrolyzed and utilized by humans. On the other hand phytates are important as a seed supply of phosphorus and as a health-promoting factor in some human populations susceptible to diseases such as heart disease and certain cancers. It is notable that phytate levels are often correlated with total seed phosphorus (P) and are the main storage form of P in plant seeds with phytates representing 65% or more of the P present in cereal or legume grain; and therefore both seed P and phytates are characteristics that should be considered jointly. From this perspective our goal has been to understand the inheritance of phytate content and its relationship with seed phosphorus in common bean seeds. The objective of this research was to evaluate quantitative trait loci (QTL) for seed phosphorus and phytate content in an inter-genepool (G2333 x G19839) recombinant inbred line population of common bean.