Extreme Resistance to Potato Virus A in Potato Cultivar Barbara is Independently Mediated by Ra and Ry(sto)
文献类型： 外文期刊
作者： Huang, Wei 1 ; Nie, Bihua 1 ; Tu, Zhen 1 ; Li, Chunyan 1 ; Murphy, Agnes 2 ; Singh, Mathuresh 3 ; Song, Botao 1 ; Zhang, Shu 4 ; Xie, Conghua 1 ; Nie, Xianzhou 2 ;
作者机构： 1.Huazhong Agr Univ, Key Lab Potato Biol & Biotechnol HZAU, Key Lab Hort Plant Biol HZAU, Minist Agr & Rural Affairs,Minist Educ, Wuhan 430070, Peoples R China
2.Agr & Agri Food Canada, Fredericton Res & Dev Ctr, Fredericton, NB E3B 4Z7, Canada
3.Agr Certificat Serv, Fredericton, NB E3B 8B7, Canada
4.Hubei Acad Agr Sci, Inst Plant Protect & Soil Fertilizer, Wuhan 430064, Peoples R China
关键词： extreme resistance; inheritance; potato; potato virus A; potato virus Y
期刊名称：PLANT DISEASE （ 影响因子：4.614； 五年影响因子：5.33 ）
ISSN： 0191-2917
年卷期： 2021 年 105 卷 11 期
页码：
收录情况： SCI
摘要： Potato virus A (PVA) and potato virus Y (PVY) are two members of genus Potyvirus infecting potato crops worldwide. Host resistance offers an economical and effective means for the control or management of these viruses. In this study, 20 potato clones were screened for their resistance against PVA and PVY by mechanical or graft inoculation assay, and were explored for the relationship between extreme resistance genes Ra and Ry by the detection of molecular markers linked to RYadg, RYsto, and Ry(chc). Six clones, including Barbara, Jizhangshu 8, Longshu 7, Longshu 8, M6, and Solara, were found to be extremely resistant to both PVA and PVY; three clones (AC142, Eshu 3, and Shepody) were deemed to be extremely resistant to PVA but susceptible to PVY. To further reveal the inheritance of the extreme resistance (ER) against PVA, a tetraploid F-1 population of Barbara x F58050 (susceptible to both PVY and PVA) and a tetraploid BC 1 population of BF145 (a PVA-resistant but PVY-susceptible progeny of Barbara x F58050) x F58050 were obtained. Phenotyping of the F-1 and BC1 populations by graft inoculation with PVA showed segregation ratios of 3:1 and 1:1 (resistant:susceptible), respectively. These results suggest that two independent loci control ER against PVA in Barbara: one confers ER to both PVA and PVY and the other confers ER to PVA only. The deduced genotype of Barbara is RyrytytyRararara.
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