Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (4): 595-601.DOI: 10.3969/j.issn.1004-1524.2021.04.04

• Crop Science • Previous Articles     Next Articles

Genetic analysis of stripe rust resistance genes in 2 spring wheat germplasm resources at adult stage

ZHAO Ke1(), LI Qiurong1, HOU Lu1,*(), BAI Yaobo2, JIANG Liling1, WEI Youhai1, GUO Qingyun1   

  1. 1. Key Laboratory of Agricultural Integrated Pest Management, Qinghai University, Qinghai Academy of Agricultural and Forestry Sciences, Xining 810016, China
    2. Xuzhou Key Laboratory of Modern Agrobiotechnology Engineering, Xuzhou Vocational College of Bioengineering, Xuzhou 221006, China
  • Received:2020-12-23 Online:2021-04-25 Published:2021-04-25
  • Contact: HOU Lu

Abstract:

Analysis of the genetic rules of the stripe rust resistance genes of spring wheat at adult stage can provide theoretical basis for the utilization of stripe rust resistance genes. In this study, stripe rust genes genetic analysis was carried out in the field for 2 years by using F2:3 generation segregating populations made by susceptible variety Taichung29 crossed with MY004730, and ZM018243 crossed with MY004730. Results showed that, disease severity and infection type of the 2 F2:3 populations showed discrete distribution and didn’t conform to normal distribution. It is speculated that resources the stripe rust resistance of MY004730 and ZM018243 at adult stage has qualitative character. Resistance and susceptible segregation ratio of F2:3 population constructed by crossing of Taichung29 and MY004730 was 3R:1S, indicating that resistance of MY004730 to stripe rust at adult plant stage was controlled by 1 dominant gene; while F2:3 population by ZM018243 crossing with MY004730, the single plants/lines resistance and susceptible segregation ratio was 9R:7S, that is conformed to 2 pairs of dominant genes work together. Therefore, it is that ZM018243 may contain 1 pair of dominant stripe rust resistance gene adult plant stage. According to the genetic analysis results, fuether research can be focused on molecular mapping of resistance genes to find markers closely linked to resistance genes, and serve for molecular marker-assisted selection breeding. At the same time, resistant gene aggregation materials can be screened from the resistance-resistance crossing population, hence provide excellent resistance materials.

Key words: spring wheat, stripe rust resistance gene, germplasm resources, genetic analysis

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