首页|Genetic Analysis of Heading Date of Japonica Rice Cultivars in Southwest China

Genetic Analysis of Heading Date of Japonica Rice Cultivars in Southwest China

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Heading date of 26 native japonica rice cultivars in southwest China was investigated,and their basic vegetative growth (BVG),photoperiod-sensitivity (PS) and temperature-sensitivity (TS) were analyzed under artificial short-day and natural long-day conditions in Nanjing,as well as artificial high-temperature and natural low-temperature conditions in winter in Hainan.The results showed that the PS and TS varied among different cultivars.The BVG of all the japonica cultivars was well situated,but differed within cultivars.Regression analysis showed a significant correlation between heading date and PS,indicating that PS was the main factor affecting heading date of japonica cultivars in southwest China.Genetic analysis was conducted on these 26 cultivars using a set of heading date near isogenic lines as test lines.All the japonica cultivars carried the dominant early-heading gene Ef-1 or Ef-1t,and most of these cultivars carried the dominant photoperiod sensitivity allele E1 or E1t,the PS of which was slightly weaker than E1.For the Se-1 locus,these cultivars mainly carried recessive photoperiod insensitivity gene Se-1e.In addition,the PS of 22 japonica cultivars could be repressed or weakened by the recessive allele hd2,inhibiting the expression of E1 and Se-1.These results indicated that the genotypes of heading date determined different PS and well situated BVG in japonica rice cultivars in southwest China.

riceheading dategenetic analysisphotoperiod sensitivitytemperature sensitivitybasic vegetative growthsouthwest China

ZHOU Zhen-ling、WEI Xiang-jin、JIANG Ling、LIU Kai、XU Da-yong、ZHAI Hu-qu、WAN Jian-min

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State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China

Lianyungang Academy of Agricultural Sciences, Lianyungang 222006, China

Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China

国家自然科学基金National High Technology Research and Development Program of ChinaProgram of Introducing Talents of Discipline to University

308714972009AA101101B08025

2011

水稻科学(英文版)
中国水稻研究所

水稻科学(英文版)

影响因子：0.269
ISSN：1672-6308
年,卷(期)：2011.18(4)
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