Chinese Bulletin of Botany ›› 2018, Vol. 53 ›› Issue (4): 468-476.DOI: 10.11983/CBB17250

• EXPERIMENTAL COMMUNICATIONS • Previous Articles     Next Articles

QTL Exploration of Bacterial Leaf Streak and Their Gene Expression in Rice

Ma Lu, Fang Yuan, Xiao Saqing, Zhou Chun, Jin Zhelun, Ye Wenlan, Rao Yuchun*()   

  1. College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
  • Received:2017-12-18 Accepted:2018-02-22 Online:2018-07-01 Published:2018-09-11
  • Contact: Rao Yuchun
  • About author:† These authors contributed equally to this paper

Abstract:

Bacterial leaf streak (BLS) is a common disease in rice and a serious threat to the high and stable production of China’s grain. We used a pair of typical indica TN1 and japonica CJ06 double haploid (DH) rice and inoculated them with Xoc BLS256, then measured and quantified the length of diseased plaques of parents and next generations. We used the molecular linkage map of this population for quantitative trait loci (QTL) mapping analysis. We found 4 QTLs that were able to distinguish the effect values located on chromosomes 2, 4, 5 and 8. We analyzed the expression of genes resistant to BLS in two large QTL intervals on chromosomes 2 and 5 and found that these genes had different degrees of expression before and after treatment. These genes might be the target genes responding to the difference in resistance to BLS of TN1 and CJ06. The results of this study lay a solid foundation for further cloning QTL for resistance to rice BLS.

Key words: bacterial leaf streak, QTL analysis, resistance, rice