Combination of Marker-Assisted Backcross Selection of Yr59 and Phenotypic Selection to Improve Stripe Rust Resistance and Agronomic Performance in Four Elite Wheat Cultivars
文献类型： 外文期刊
作者： Zhang, Min 1 ; Fang, Taohong 1 ; Zhou, Xinli 1 ; Chen, Xianming 2 ; Li, Xin 1 ; Feng, Junyan 3 ; Yang, Suizhuang 1 ; Kang, Zhensheng 4 ;
作者机构： 1.Southwest Univ Sci & Technol, Sch Life Sci & Engn, Wheat Res Inst, Mianyang 621000, Sichuan, Peoples R China
2.Washington State Univ, Dept Plant Pathol, USDA ARS, Wheat Hlth Genet & Qual Res Unit, Pullman, WA 99164 USA
3.Sichuan Acad Agr Sci, Biotechnol & Nucl Technol Res Inst, Chengdu 610066, Peoples R China
4.Northwest A&F Univ, Coll Plant Protect, State Key Lab Crop Stress Biol Arid Areas, Xianyang 712100, Peoples R China
关键词： wheat stripe rust; high-temperature adult-plant (HTAP) resistance; marker-assisted selection; agronomic traits
期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）
ISSN：
年卷期： 2022 年 12 卷 2 期
页码：
收录情况： SCI
摘要： In this study, we successfully introgressed and validated Yr59 into four elite wheat cultivars, Jimai 22, Chuanmai 42, Zhengmai 9023 and Xinmai 26 through marker-assisted backcross selection. Used as female parents, these four cultivars were crossed with wheat line PI 660061 (Yr59). After two backcrosses and marker-assisted selection, the progenies were selfed and advanced to the BC2F4 generation. A total of 123 BC2F4 lines were selected based on agronomic traits and stripe rust resistance, and their BC2F5 and BC2F6 progenies were further evaluated for stripe rust resistance and agronomic traits. Seven markers linked with relevant genes, including Xbarc32, Xwgp5175, Xwmc557 and Xcfa2040 linked with Yr59; Xwmc658 with YrJ22; WE173 and Xbarc181 with Yr26, were used to genotype the breeding lines. A total of 109 introgression lines with positive markers for Yr59 were identified for further stripe rust and agronomic trait evaluation. Finally, 16 lines had higher levels resistance to stripe rust, and similar or superior agronomic traits compared to their parents were obtained. These lines can be released as new cultivars for various regions after regional tests and also can be used as resistance stocks for regional breeding programs to develop new cultivars with adequate and durable resistance to stripe rust.
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