Open AccessUsing Heading date 1 preponderant alleles from indica cultivars to breed high‐yield, high‐quality japonica rice varieties for cultivation in south China
Author(s) -
Leng Yujia,
Gao Yihong,
Chen Long,
Yang Yaolong,
Huang Lichao,
Dai Liping,
Ren Deyong,
Xu Qiankun,
Zhang Ya,
Ponce Kimberly,
Hu Jiang,
Shen Lan,
Zhang Guangheng,
Chen Guang,
Dong Guojun,
Gao Zhenyu,
Guo Longbiao,
Ye Guoyou,
Qian Qian,
Zhu Li,
Zeng Dali
Publication year - 2020
Publication title -
plant biotechnology journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.525
H-Index - 115
eISSN - 1467-7652
pISSN - 1467-7644
DOI - 10.1111/pbi.13177
Subject(s) - biology , japonica , breed , haplotype , backcrossing , allele , cultivar , japonica rice , yield (engineering) , agronomy , horticulture , botany , genetics , gene , materials science , metallurgy
Summary Heading date 1 ( Hd1 ) is an important gene for the regulation of flowering in rice, but its variation in major cultivated rice varieties, and the effect of this variation on yield and quality, remains unknown. In this study, we selected 123 major rice varieties cultivated in China from 1936 to 2009 to analyse the relationship between the Hd1 alleles and yield‐related traits. Among these varieties, 19 haplotypes were detected in Hd1 , including two major haplotypes (H8 and H13) in the japonica group and three major haplotypes (H14, H15 and H16) in the indica group. Analysis of allele frequencies showed that the secondary branch number was the major aimed for Chinese indica breeding. In the five major haplotypes, SNP 316 (C‐T) was the only difference between the two major japonica haplotypes, and SNP 495 (C‐G) and SNP 614 (G‐A) are the major SNPs in the three indica haplotypes. Association analysis showed that H16 is the most preponderant allele in modern cultivated Chinese indica varieties. Backcrossing this allele into the japonica variety Chunjiang06 improved yield without decreasing grain quality. Therefore, our analysis offers a new strategy for utilizing these preponderant alleles to improve yield and quality of japonica varieties for cultivation in the southern areas of China.