Description of grain weight distribution leading to genomic selection for grain-filling characteristics in rice.

ABSTRACT: Grain-filling ability is one of the factors that controls grain yield in rice (Oryza sativa L.). We developed a method for describing grain weight distribution, which is the probability density function of single grain weight in a panicle, using 128 Japanese rice varieties. With this method, we quantitively analyzed genotypic differences in grain-filling ability and used the grain weight distribution parameters for genomic prediction subject to genetic improvement in grain yield in rice. The novel description method could represent the observed grain weight distribution with five genotype-specific parameters of a mixture of two gamma distributions. The estimated genotype-specific parameters representing the proportion of filled grains had applicability to explain the grain filling ability

SUBMITTER: Yabe S 

PROVIDER: S-EPMC6245794 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature