Elimination of the yellow pigment gene PSY-E2 tightly linked to the Fusarium head blight resistance gene Fhb7 from Thinopyrum ponticum  被引量:1

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作  者:Xuefeng Li Dong Li Yu Xuan Ziming He Lanfei Zhao Yongchao Hao Wenyang Ge Shoushen Xu Bingqian Hou Biao Wang Jun Guo Wenwen Liu Mingzhu Li Yi Han Cunyao Bo Yinguang Bao Zengjun Qi Steven S.Xu Guihua Bai Hongwei Wang Lingrang Kong 

机构地区:[1]State Key Laboratory of Crop Biology,Shandong Key Laboratory of Crop Biology,College of Agronomy,Shandong Agricultural University,Tai’an 271018,Shandong,China [2]State Key Laboratory of Crop Genetics and Germplasm Enhancement,Nanjing Agricultural University,Nanjing 210095,Jiangsu,China [3]Department of Agronomy,Kansas State University,2004 Throckmorton Hall,Manhattan,KS 66506,USA [4]Crop Research Institute,Shandong Academy of Agricultural Sciences,Jinan 250100,Shandong,China [5]Cereal Crops Research Unit,Red River Valley Agricultural Research Center,USDA-ARS,Fargo,ND 58102,USA [6]USDA,Hard Winter Wheat Genetics Research Unit,4008 Throckmorton Hall,Manhattan,KS 66506,USA

出  处:《The Crop Journal》2023年第3期957-962,共6页作物学报(英文版)

基  金:supported by the National Natural Science Foundation of China(32030081,31871610);the Agricultural Variety Improvement Project of Shandong Province(2019LZGC016);the U.S.Wheat and Barley Scab Initiative。

摘  要:Fhb7 is a major gene that was transferred from Thinopyrum ponticum to chromosome 7D of wheat(Triticum aestivum)and confers resistance to both Fusarium head blight(FHB)and Fusarium crown rot(FCR).However,Fhb7 is tightly linked to the PSY-E2 gene,which causes yellow flour,limiting its application in breeding.To break this linkage,marker K-PSY was developed for tagging PSY-E2 and used with Fhb7 markers to identify recombination between the two genes.Screening 21,000 BC1F2 backcross progeny(Chinese Spring ph1bph1b*2/SDAU 2028)revealed two Fhb7^(+)wheat-Tp7el_(2)L lines,Shannong 2–16and Shannong 16–1,that carry a desired truncated Fhb7^(+)translocation segment without PSY-E2.The two lines show levels of resistance to FHB and FCR similar to those of the original translocation line SDAU 2028,but have white flour.To facilitate Fhb7 use in wheat breeding,STS markers were developed and used to isolate Fhb7 on a truncated Tp7el_(2) translocation segment.Near-isogenic lines carrying the Fhb7^(+)segment were generated in the backgrounds of three commercial cultivars,and Fhb7^(+)lines showed increased FHB and FCR resistance without yield penalty.The breakage of the tight linkage between Fhb7 and PSY-E2 via homoeologous recombination provides genetic resources for improvement of wheat resistance to FHB and FCR and permit the large-scale deployment of Fhb7 in breeding using marker-assisted selection.

关 键 词:Triticum aestivum Thinopyrum ponticum Fusarium head blight Fusarium crown rot Truncated Fhb7 translocation 

分 类 号:S435.121.45[农业科学—农业昆虫与害虫防治]

 

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