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Genomic location of Gb1, a unique gene conferring wheat resistance to greenbug biotype F

作者：

Xiangyang Xu;Genqiao Li;Guihua Bai;Brett F. Carver;Ruolin Bian;Amy Bernardo;J. Scott Armstron

单位：

Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK 74078, USA;USDA-ARS Hard Winter Wheat Genetics Research Unit, Manhattan, KS 66506, USA;USDA-ARS Wheat, Peanut, and Other Field Crop Research Unit, Stillwater, OK 74075, US;USDA-ARS Wheat, Peanut, and Other Field Crop Research Unit, Stillwater, OK 74075, USA; USDA-ARS Hard Winter Wheat Genetics Research Unit, Manhattan, KS 66506, USA;Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA

关键词：

Wheat;Greenbug resistance gene Gb1;KASP markers;Linkage analysis;Genotyping-by-sequencing;LEAF RUST;APHIDIDAE;HOMOPTERA;REGISTRATION;INHERITANCE;GERMPLASMS;HEMIPTERA;BARLE

摘要：

Greenbug (Schizaphis graminum, Rondani) is a serious insect pest in many wheat growing regions and has been infesting cereal crops in the USA for over a century. Continuous occurrence of new greenbug biotypes makes it essential to explore all greenbug resistant sources available to manage this pest. Gb1, a recessive greenbug resistance gene in DS28A, confers resistance to several economically important greenbug biotypes and is the only gene found to be resistant to greenbug biotype F. A set of 174 F-2:3 lines from the cross DS28A x Custer was evaluated for resistance to greenbug biotype F in 2020 and 2022. Selective genotyping of the corresponding F-2 population using single nucleotide polymorphism (SNP) markers generated by genotyping-by-sequencing (GBS) led to the identification of a candidate genomic region for Gb1. Thus, SSR markers previously mapped in this region were used to genotype the entire F-2 population, and kompetitive allele specific PCR (KASP) markers were also developed from SNPs in the target region. Gb1 was placed in the terminal region of the short arm of chromosome 1A, and its location was confirmed in a second population derived from the cross DS28A x PI 697274. The combined data analysis from the two mapping populations delimited Gb1 to a < 1 Mb interval between 13,328,200 and 14,241,426 bp on 1AS.(c) 2023 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Genomic location of Gb1, a unique gene conferring wheat resistance to greenbug biotype F

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