Identification of Black Rot Resistance in a Wild Brassica Species and Its Potential Transferability to Cauliflower

文献类型： 外文期刊

第一作者： Sheng, Xiao-Guang

作者： Sheng, Xiao-Guang;Zhao, Zhen-Qing;Wang, Jian-Sheng;Yu, Hui-Fang;Shen, Yu-Sen;Gu, Hong-Hui;Branca, Ferdinando

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关键词： black rot; Brassica oleracea; resistance; cross-compatibility; genetics

期刊名称：AGRONOMY-BASEL （ 影响因子：3.417； 五年影响因子：3.64 ）

ISSN：

年卷期： 2020 年 10 卷 9 期

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收录情况： SCI

摘要： Black rot is a destructive disease that affectsB. oleraceacrops, causing significant losses to growers throughout the world. The purpose of this study was to screen out new sources resistant toXanthomonas campestrispv.campestrisrace 4 (Xcc4) in 26 cauliflower and six related wild species, and to assess the inheritance of resistance. The results indicate that most of the tested accessions were susceptible or had intermediate resistance, except the Boc4601 (a cauliflower stable inbred line) and PI435896, UNICT5168, and UNICT5169 (wild accessions). Among them, UNICT5169 (Brassica montana) and PI435896 (Brassica balearica) showed the strongest resistance toXcc4, with significantly lower disease index (DI), area of the infected part (AIP) and proportion of the infected part to the total leaf area (PTL) values. UNICT 5169 was selected as anXcc4-resistant parent because of its relatively good cross seed-setting rate with cauliflower cultivars. F-1 hybrids were successfully produced between this wild resistant accession (UNICT 5169) and one susceptible cauliflower breeding line (Boc3202-4), indicating the potential transferability of this resistance to cauliflower. The results of the symptoms severity evaluation of the F-2 population indicate thatXcc4 resistance in UNICT5169 is a quantitative trait, which guides future resistance gene location and black rot resistance breeding.

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