Mapping quantitative trait loci for heat tolerance at the booting stage using chromosomal segment substitution lines in rice.

ABSTRACT: High temperature stress is a major obstacle in rice productivity. Considerable progress has been made on studying heat tolerance (HT) at different stages. However, the genetic basis of HT at the booting stage is poorly understood. In this study, we analyzed the morphological features of a heat-sensitive japonica cultivar Sasanishiki under natural high temperature stress at the booting stage. The anthers became smaller and the number, and fertility, of pollen grains were decreased significantly. As a result, there was a dramatic reduction in spikelet fertility. In contrast, the indica cultivar Habataki showed high HT and normal spikelet fertility under high temperature stress. Additonally, a set of chromosome segment substitution lines, derived from Sasanishiki and Habataki, were evaluated

SUBMITTER: Zhu S 

PROVIDER: S-EPMC5671447 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature