ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (6): 54-62. doi: 10.7668/hbnxb.201751677

Special Issue: Rice

• Crop Genetics·Germplasm Resources·Biotechnology • Previous Articles     Next Articles

QTLs Analysis for Plant Height and Leaf Traits of Rice under Two Nitrogen Levels

YAO Xiaoyun1,2, FAN Shuxiu1, ZOU Guoxing2, WU Yanshou2, CHEN Chunlian2, XIONG Yunhua2, LIU Jin1,2, WANG Jiayu1, XU Zhengjin1   

  1. 1. Rice Research Institute, Shenyang Agricultural University, Shenyang 110866, China;
    2. Rice Research Institute, Jiangxi Academy of Agricultural Sciences, National Engineering Laboratory for Rice(Nanchang), Nanchang Sub-center, National Rice Improvement Center, Nanchang 330200, China
  • Received:2019-09-21 Published:2019-12-28

Abstract: To reveal the molecular genetic basis of plant height and leaf traits of rice in different nitrogen environments and identify the novel environmental insensitive major QTL cluster, a recombinant inbred lines(RILs) derived from the cross between Toyonishiki(Japonica) and Zhongyouzao 8(Indiaca) was used to identify QTLs for plant height and leaf traits under two different nitrogen levels. The plant height and leaf traits of the parents changed obviously under different nitrogen levels, and the change of Zhongyouzao 8 was significantly higher than that of Toyonishiki. The plant height and leaf traits had higher heritability under different nitrogen levels. A total of thirty-eight QTLs affecting the plant height and leaf traits were identified, which distributed in 17 regions of 10 chromosomes. Among the QTLs detected, nine could be stably expressed in different nitrogen levels, which mainly distributed on chromosomes 7, 8 and 11. Two new stable major QTL clusters qPHLW7 and qFLWA10 were detected.qPHLW7 was located on chromosome 7 and had the function of regulating plant height, leaf length and leaf width. qFLWA10 was located on chromosome 10, which involved in the regulation of flag leaf width and flag leaf area and had obvious function of extending leaf width and area. In addition, a total of 23 epistatic QTLs were detected, and epistatic interaction was one of the most important genetic component to regulate the plant height and leaf traits. Nine stable expressive major QTL were detected, in which the QTL cluster qPHLW7 and qFLWA10 were two key chromosome regions for leaf and plant height traits, and then it will provide a foundation for further study.

Key words: Rice, Nitrogen level, Plant height, Flag leaf, QTL mapping

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Cite this article

YAO Xiaoyun, FAN Shuxiu, ZOU Guoxing, WU Yanshou, CHEN Chunlian, XIONG Yunhua, LIU Jin, WANG Jiayu, XU Zhengjin. QTLs Analysis for Plant Height and Leaf Traits of Rice under Two Nitrogen Levels[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(6): 54-62. doi: 10.7668/hbnxb.201751677.

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