Fellers John P, Matthews Angie, Fritz Allan K, Rouse Matthew N, Grewal Surbhi, Hubbart-Edwards Stella, King Ian P, King Julie
USDA-ARS Hard Winter Wheat Genetics Research Unit Manhattan KS 66506 USA.
Department of Agronomy Kansas State University Manhattan KS 66506 USA.
Crop Sci. 2020 Jul-Aug;60(4):1957-1964. doi: 10.1002/csc2.20120. Epub 2020 Jul 7.
Wheat ( 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 (Boiss.) Eig introgression lines, with introgressions covering the majority of the T genome, were evaluated for resistance to Erikss., Pers.:Pers. f.sp. Erikss. & E. Henning, and Westend. f.sp. Erikss.. At the seedling level, four lines were resistant to races of , six lines were resistant to , and 15 lines were resistant to . At the adult stage, 16 lines were resistant to . Line 355 had resistance to all three rusts and line 161 had resistance to all tested races of . 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.
小麦（L.）锈病是一个全球性的生产问题。植物育种者利用遗传抗性来对抗这些真菌。然而，由于新的毒性真菌菌株频繁出现，单基因抗性很快就会被克服。因此，持续需要新的抗性来源，而新的抗性来源在六倍体小麦遗传种质中有限。野生近缘种能够成为新抗性基因的资源，但由于与驯化小麦的染色体不亲和而受到阻碍。对28个双单倍体六倍体小麦（Boiss.）Eig渐渗系进行了评估，这些渐渗系的渐渗覆盖了大部分T基因组，以检测其对Erikss.、Pers.：Pers. f.sp. Erikss. & E. Henning以及Westend. f.sp. Erikss.的抗性。在幼苗期，4个品系对的小种有抗性，6个品系对有抗性，15个品系对有抗性。在成株期，16个品系对有抗性。355品系对所有三种锈病都有抗性，161品系对所有测试的小种都有抗性。其中一些品系需要进一步工作以减小渐渗片段的大小；然而，92和355品系的片段非常小，可以直接用作新的抗性供体。
