Detection and validation of QTLs for milky-white grains caused by high temperature during the ripening period in Japonica rice.

ABSTRACT: The occurrence of chalky rice (Oryza sativa L.) grains caused by high temperature is a serious problem in rice production. Of the several kinds of chalky grains, milky-white grains are not well analyzed. The milky-white rice grain phenomenon is caused by genetic factors as well as environmental and nutritional conditions. To analyze the genetic control system for rice grain quality, we raised recombinant inbred lines from progeny produced from 'Tsukushiroman' (high temperature sensitive) and 'Chikushi 52' (high temperature tolerant) cultivars. Quantitative trait locus (QTL) analysis revealed that the QTL on chromosome 4, linked to the simple sequence repeat marker RM16424, contributed substantially to the occurrence of milky-white grains, as it was detected over two experimental years. To

SUBMITTER: Miyahara K 

PROVIDER: S-EPMC5654459 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature