J Integr Plant Biol. ›› 2021, Vol. 63 ›› Issue (10): 1695-1711.DOI: 10.1111/jipb.13157

Special Issue: Evolution Plant-biotic interaction

• Molecular Ecology and Evolution • Previous Articles     Next Articles

Balancing selection and wild gene pool contribute to resistance in global rice germplasm against planthopper

Cong Zhou1†, Qian Zhang1†, Yu Chen1†, Jin Huang1, Qin Guo1, Yi Li1, Wensheng Wang2,3, Yongfu Qiu4, Wei Guan1, Jing Zhang1, Jianping Guo1, Shaojie Shi1, Di Wu1, Xiaohong Zheng1, Lingyun Nie1, Jiaoyan Tan1, Chaomei Huang1, Yinhua Ma1, Fang Yang1, Xiqin Fu5, Bo Du1, Lili Zhu1, Rongzhi Chen1, Zhikang Li2,3, Longping Yuan5 and Guangcun He1*   

  1. 1 State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China
    2 Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
    3 College of Agronomy, Anhui Agricultural University, Hefei 230036, China
    4 State Key Laboratory for Conservation and Utilization of Subtropical Agro‐bioresources, Agricultural College, Guangxi University, Nanning 530004, China
    5 State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Hunan Academy of Agricultural Sciences, Changsha 410125, China

    These authors contributed equally to this work.
    *Correspondence: Guangcun He (gche@whu.edu.cn)
  • Received:2021-07-08 Accepted:2021-07-22 Online:2021-07-24 Published:2021-10-01

Abstract: Interactions and co-evolution between plants and herbivorous insects are critically important in agriculture. Brown planthopper (BPH) is the most severe insect of rice, and the biotypes adapt to feed on different rice genotypes. Here, we present genomics analyses on 1,520 global rice germplasms for resistance to three BPH biotypes. Genome-wide association studies identified 3,502 single nucleotide polymorphisms (SNPs) and 59 loci associated with BPH resistance in rice. We cloned a previously unidentified gene Bph37 that confers resistance to BPH. The associated loci showed high nucleotide diversity. Genome-wide scans for trans-species polymorphisms revealed ancient balancing selection at the loci. The secondarily evolved insect biotypes II and III exhibited significantly higher virulence and overcame more rice varieties than the primary biotype I. In response, more SNPs and loci evolved in rice for resistance to biotypes II and III. Notably, three exceptional large regions with high SNP density and resistance-associated loci on chromosomes 4 and 6 appear distinct between the resistant and susceptible rice varieties. Surprisingly, these regions in resistant rice might have been retained from wild species Oryza nivara. Our findings expand the understanding of long-term interactions between rice and BPH and provide resistance genes and germplasm resources for breeding durable BPH-resistant rice varieties.

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