Chinese Journal OF Rice Science

Chinese Journal OF Rice Science >

2009 , Vol. 23 >Issue 6: 595 - 603

DOI: https://doi.org/10.3969/j.issn.1001-7216.2009.06.06

研究报告

Genetic Analysis of Heading Date of japonica Rice Cultivars in North China

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  • 1 State Key Laboratory of Crop Genetics and Germplasm Enhancement/Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing 210095, China; 2 Chinese Academy of Agricultural Sciences, Beijing 100081, China; *Corresponding author, E-mail: wanjm@njau.edu.cn

Received date: 1900-01-01

  Revised date: 1900-01-01

  Online published: 2009-11-10

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Abstract

Heading date is one of the most important traits for the adaptation of rice to different cultivation areas and cropping seasons. North China (34°N to 42°N) plays an important role in japonica rice planting. Variation for heading date among 14 japonica rice cultivars grown in North China was characterized, and their sensitivity to variation in photoperiod and temperature was analyzed. Among them, 11 cultivars were sensitive to photoperiod，but the photoperiod sensitivity of most cultivars were weak. A regression analysis showed that heading date is closely correlated with photoperiod sensitivity. Thirteen cultivars were also sensitive to temperature. Genetic analyses were conducted on these 14 cultivars using a set of heading date near isogenic lines. The results showed that all these japonica cultivars carried the photoperiod sensitivity gene E1, and most of these cultivars carried the dominant earlyheading gene Ef1 and recessive photoperiod insensitivity gene Se1e. The photoperiod sensitivity of some cultivars can be repressed or weakened by Ef1 and the recessive allele hd2 they carried. The above results indicates that the japonica rice cultivars grown in North China with weak photoperiod sensitivity and short basic vegetative growth phase were mainly determined by heading date genotypes, and could be useful for breeding new cultivars well adapted to North China.

Key words： rice; heading date; genetic analysis; North China; photoperiod sensitivity; temperature sensitivity; genotype

Cite this article

WEI Xiang-jin,JIANG Ling,XU Jun-feng,LU Guang-wen,WANG Hong-jun,WANG Zhi-quan,ZHAI Hu-qu,WAN Jian-min . Genetic Analysis of Heading Date of japonica Rice Cultivars in North China[J]. Chinese Journal OF Rice Science, 2009 , 23(6) : 595 -603 . DOI: 10.3969/j.issn.1001-7216.2009.06.06

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