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Resistance to wheat rusts identified in wheat/ Amblyopyrum muticum chromosome introgressions
Author(s) -
Fellers John P.,
Matthews Angie,
Fritz Allan K.,
Rouse Matthew N.,
Grewal Surbhi,
HubbartEdwards Stella,
King Ian P.,
King Julie
Publication year - 2020
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.1002/csc2.20120
Subject(s) - biology , introgression , seedling , resistance (ecology) , ploidy , chromosome , plant disease resistance , common wheat , gene , botany , agronomy , genetics
Abstract Wheat ( Triticum aestivum L.) rusts are a worldwide production problem. Plant breeders have used genetic resistance to combat these fungi. However, single‐gene resistance is rapidly overcome as a result of frequent occurrence of new virulent fungal strains. Thus, a supply of new resistance sources is continually needed, and new resistance sources are limited within hexaploid wheat genetic stocks. Wild relatives are able to be a resource for new resistance genes but are hindered because of chromosome incapability with domesticated wheats. Twenty‐eight double‐haploid hexaploid wheat /Amblyopyrum muticum (Boiss.) Eig introgression lines, with introgressions covering the majority of the T genome, were evaluated for resistance to Puccinia triticina Erikss., P. graminis Pers.:Pers. f.sp. tritici Erikss. & E. Henning, and P. striiformis Westend. f.sp. tritici Erikss.. At the seedling level, four lines were resistant to races of P. triticina , six lines were resistant to P. graminis , and 15 lines were resistant to P. striiformis . At the adult stage, 16 lines were resistant to P. triticina . Line 355 had resistance to all three rusts and line 161 had resistance to all tested races of P. triticina . Some of these lines will require further work to reduce the size of the introgressed segment; however, lines 92 and 355 have very small fragments and can be used directly as new resistance donors.