Biotechnology Bulletin ›› 2022, Vol. 38 ›› Issue (7): 153-159.doi: 10.13560/j.cnki.biotech.bull.1985.2021-1228

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Development and Application of the Combinatorial Marker for the Rice Blast Resistance Gene Pigm

LI Bai1(), CAI Zhi-jun1, WANG Lei1, CHEN Jie1, CAO Kui-rong1, LI Jun2, CHONG Gao-jun1()   

  1. 1. Jiaxing Academy of Agricultural Sciences,Jiaxing 314016
    2. Jiaxing Vocational & Technical College,Jiaxing 314036
  • Received:2021-09-24 Online:2022-07-26 Published:2022-08-09
  • Contact: CHONG Gao-jun E-mail:libaia@yeah.net;gaojunchong@126.com

Abstract:

Pigm is one of the rice blast resistance genes,with broad-spectrum and lasting resistance. A variety of molecular markers have been developed for Pigm gene,but the detection specificity or recognition is still insufficient. Seven Pigm markers were analyzed by NCBI,including Pigm-4,T9E4,DG-2,M80410,R060939,GMR-3 and T-Pigm,and total 40 rice varieties species were detected and verified. According to the sequence analysis and detection results,a combinatorial marker was developed and applied to Zhennuo 19 × Kongyu 131(Pigm)molecular marker-assisted selection. Sequence analysis showed that M80410 marker had strong specificity,but could not distinguish heterozygous genotypes;Pigm-4,T-Pigm and T9E4 etc. markers distinguished heterozygous genotypes,but their specificity was slightly insufficient. Combined with the detection results of rice varieties,Pigm-4 and M80410 were selected as combinatorial marker and used in assisted breeding. The glutinous rice line NK29 was selected,which had good resistance to rice blast. Combinatorial marker can quickly and accurately identify the homozygous dominant,homozygous recessive and heterozygous genotypes of Pigm,which lays a foundation for Pigm molecular breeding.

Key words: Pigm, rice blast, glutinous rice, combinatorial marker