Co-located quantitative trait loci mediate resistance to Agrobacterium tumefaciens, Phytophthora cinnamomi,and *** in Juglans microcarpa×*** hybrids
作者机构：Department of Plant SciencesUniversity of CaliforniaDavisUSA USDA-ARS Crops Pathology and Genetics Research UnitDepartment of Plant PathologyUniversity of CaliforniaDavisUSA National Clonal Germplasm RepositoryUSDA-ARSUniversity of CaliforniaDavisUSA Department of NematologyUniversity of CaliforniaRiversideUSA
出 版 物：《Horticulture Research》 (园艺研究（英文）)
年 卷 期：2021年第8卷第1期
页 面：1363-1373页
核心收录：
学科分类：09[农学] 0904[农学-植物保护] 090401[农学-植物病理学]
基 金：This work was supported in part by USDA NIFA-SCRI grants no.59-5306-2-333 and 2018-51181-28437 the California Walnut Board,USDA ARS Project:2032-22000-016-00D,and NIFA-Hatch 1010599
摘 要：Soil-borne plant pathogens represent a serious threat that undermines commercial walnut(Juglans regia)production *** gall,caused by Agrobacterium tumefaciens,and Phytophthora root and crown rots,caused by various Phytophthora spp.,are among the most devastating walnut soil-borne diseases.A recognized strategy to combat soil-borne diseases is adoption of resistant ***,resistance to ***,***,and *** is mapped in the genome of Juglans microcarpa,a North American wild relative of cultivated ***-sib *** mother trees DJUG 31.01 and DJUG 31.09 were crossed with *** ***,producing 353 and 400 hybrids,*** propagated hybrids were genotyped by sequencing to construct genetic maps for the two populations and challenged with the three *** to each of the three pathogens was mapped as a major QTL on the long arm of *** chromosome 4D and was associated with the same haplotype,designated as haplotype b,raising the possibility that the two mother trees were heterozygous for a single Mendelian gene conferring resistance to all three *** deployment of this haplotype in rootstock breeding will facilitate breeding of a walnut rootstock resistant to both crown gall and Phytophthora root and crown rots.
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