数字农科院2.0

Analysis Of Extreme Phenotype Bulk C.opy Number Variation (Xp-Cnv) I dentified The Association Of Rp1 With Resistance To Goss'S Wilt Of Maize

文献类型： 外文期刊

作者： Hu, Y; Ren, J; Peng, Z; Umana, AA; Le, H; Danilova, T; Fu, JJ; Wang, HY; Robertson, A; Hulbert, SH; White, FF; Liu, SZ

作者机构：

关键词： goss's wilt; resistance; copy number variation; rp1; Zea mays

期刊名称： FRONTIERS IN PLANT SCIENCE

ISSN： 1664-462X

年卷期： 2018 年 9 卷

页码：

收录情况： JCR（2021版）

摘要： Goss's wilt (GW) of maize is caused by the Gram-positive bacterium Clavibacter michiganensis subsp. nebraskensis (Cmn) and has spread in recent years throughout the Great Plains, posing a threat to production. The genetic basis of plant resistance is unknown. Here, a simple method for quantifying disease symptoms was developed and used to select cohorts of highly resistant and highly susceptible lines known as extreme phenotypes (XP). Copy number variation (CNV) analyses using whole genome sequences of bulked XP revealed 141 genes containing CNV between the two XP groups. The CNV genes include the previously identified common rust resistant locus rp1. Multiple Rp1 accessions with distinct rp1 haplotypes in an otherwise susceptible accession exhibited hypersensitive responses upon inoculation. GW provides an excellent system for the genetic dissection of diseases caused by closely related subspecies of C. michiganesis. Further work will facilitate breeding strategies to control GW and provide needed insight into the resistance mechanism of important related diseases such as bacterial canker of tomato and bacterial ring rot of potato.

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