Reference "Genetic analysis of gelatinization temperature in rice via microsatellite (SSR) markers."

Reference ID

7838

Title

Genetic analysis of gelatinization temperature in rice via microsatellite (SSR) markers.

Source

Acta genetica Sinica, 2001, vol. 28(11), pp. 1006-1011

Authors (6)

Yan-C-J	Xu-C-W
Yi-C-D	Liang-G-H
Zhu-L-H	Gu-M-H

Abstract

Rice gelatinization temperature is an important character contributing to
cooking quality. Here the inheritance of gelatinization temperature (GT), which
was represented by alkali spreading value (ASV), was reported. Two parents,
Balilla (japonica variety) and Nantehao (indica variety), which were
significantly different on GT-ASV, were selected to construct a backcross
population, Balilla/Nantehao// Balilla containing 142 individuals. And ASV was
investigated in the population, a continuous distribution with two obvious peaks
was observed. It indicated that GT-ASV was controlled by one major gene, also
modified by some minor genes. In order to map the major and minor genes and
estimate the effects of genes. A total of 119 SSR markers were employed to
construct a linkage map; further a genome-wide detection was carried out by
interval mapping method. The results showed that 6 QTLs were detected, of which,
qASV6 - 1 located on chromosome 6 was a major gene with 87.6% variance
explained, and alleles from parent Nantehao could decrease the value. It should
be the same locus as the alkali degeneration gene (alk). The other QTLs (qASV2,
qASV3, qASV6 - 2, qASV9, and qASV11) all belong to minor genes, which were
located on chromosome 2, 3, 6, 9 and 11, respectively. In two parents, they
carried the positive and negative alleles simultaneously. These results will be
helpful for rice quality breeding and improvement.