Genome-wide association study and candidate gene analysis of rice cadmium accumulation in grain in a diverse rice collection.

ABSTRACT:

Background

Cadmium (Cd) accumulation in rice followed by transfer to the food chain causes severe health problems in humans. Breeding of low Cd accumulation varieties is one of the most economical ways to solve the problem. However, information on the identity of rice germplasm with low Cd accumulation is limited, particularly in indica, and the genetic basis of Cd accumulation in rice is not well understood.

Results

Screening of 312 diverse rice accessions revealed that the grain Cd concentrations of these rice accessions ranged from 0.12 to 1.23 mg/kg, with 24 accessions less than 0.20 mg/kg. Three of the 24 accessions belong to indica. Japonica accumulated significantly less Cd than indica (p < 0.001), while tropical japonica accumulated significantly less Cd than tempera

SUBMITTER: Zhao J 

PROVIDER: S-EPMC6249348 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature