Rice Science (May 2015)

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

  • Feng Yue,
  • Zhai Rong-rong,
  • Lin Ze-chuan,
  • Cao Li-yong,
  • Wei Xing-hua,
  • Cheng Shi-hua

DOI
https://doi.org/10.1016/j.rsci.2015.05.014
Journal volume & issue
Vol. 22, no. 3
pp. 108 – 115

Abstract

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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.

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