Quantitative Trait Locus Analysis for Rice Yield Traits under Two Nitrogen Levels

Rice Science

Cao Li-yong¹  Wei Xing-hua¹  Feng Yue¹  Cheng Shi-hua¹  Lin Ze-chuan¹  Zhai Rong-rong² 

[1] Chinese National Center for Rice Improvement / State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China;Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;

关键词: nitrogen;    quantitative trait locus;    rice;    yield trait;   

DOI  :  10.1016/j.rsci.2015.05.014

来源: DOAJ

【 摘 要 】

A recombinant inbred line population derived from a super hybrid rice Xieyou 9308 (Xieqingzao B/Zhonghui 9308) and its genetic linkage map were used to detect quantitative trait loci (QTLs) for rice yield traits under the low and normal nitrogen (N) levels. A total of 52 QTLs for yield traits distributed in 27 regions on 9 chromosomes were detected, with each QTL explaining 4.93%–26.73% of the phenotypic variation. Eleven QTLs were simultaneously detected under the two levels, and 30 different QTLs were detected under the two N levels, thereby suggesting that the genetic bases controlling rice growth under the low and normal N levels were different. QTLs for number of panicles per plant, number of spikelets per panicle, number of filled grains per panicle, and grain density per panicle under the two N levels were detected in the RM135–RM168 interval on chromosome 3. QTLs for number of spikelets per panicle and number of filled grains per panicle under the two N levels, as well as number of panicles per plant and grain density per panicle, under the low N level, were detected in the RM5556–RM310 interval on chromosome 8. The above described QTLs shared similar regions with previously reported QTLs for rice N recycling.

【 授权许可】

Unknown