中国水稻科学2011，Vol.25Issue(3)：267-276,10.DOI:10.3969/j.issn.1001-7216.2011.03.007
我国西南地区粳稻品种抽穗期的遗传分析
Genetic Analysis of Heading Date of Japonica Rice Cultivars in Southwest China
摘要
Abstract
Heading dates of 26 japonica rice cultivars native to Southwest China were investigated, and their basic vegetative growth(BVG), photoperiod-sensitivities(PS) and temperature-sensitivities(TS) were analyzed under artificially short-day and natural long-day conditions in Nanjing of Jiangsu Province, China, as well as artificially high temperature and natural low temperature conditions in winter in Hainan Province, China. The results showed that the PS and TS varied with different cultivars. The BVGs of all the japonica cultivars were well situated, but differed in cultivars. Regression analysis showed a significant correlation between heading date and PS, indicating that PS was the main factor affecting heading date of japonica cultivar in Southwest China. Genetic analyses were conducted on these 26 cultivars using a set of heading date near isogenic lines as tester lines. The results showed that all these japonica eultivars carried the dominant early-heading gene Ef-1 or Ef-1t, and most of these cultivars carried the dominant photoperiod sensitivity allele E1 or E1 t, the PS of which was slightly weaker than E1. For the Se-1 locus, these japonica cultivars mainly carried recessive photoperiod insensitivity gene Se-1 e. In addition, the recessive allele hd2 could repress or weaken the PS of 22 japonica cultivars by inhibiting the expression of E1 and Se-1. These results indicate that the heading date genotypes determined different PS and well situated BVG in japonica rice cultivars of Southwest China. The above results would be useful for breeding and expanding new japonica cultivars with well adaptability in Southwest China.关键词
水稻/抽穗期/遗传分析/感光性/感温性/基本营养生长性/西南地区Key words
rice/ heading date/ genetic analysis/ photoperiod sensitivity/ temperature sensitivity/ basic vegetative growth/Southwest China分类
农业科技引用本文复制引用
周振玲,魏祥进,江玲,刘凯,徐大勇,翟虎渠,万建民..我国西南地区粳稻品种抽穗期的遗传分析[J].中国水稻科学,2011,25(3):267-276,10.基金项目
国家自然科学基金资助项目(30871497) （30871497）
国家863计划资助项目(2009AA101101) （2009AA101101）
江苏省品种创新工程资助项目(BE2009301-3,BE2008354) （BE2009301-3,BE2008354）
高等学校学科创新引智计划资助项目(1308025). （1308025）
