Mapping a Type 1 FHB resistance on chromosome 4AS of Triticum macha and deployment in combination with two Type 2 resistances.
Mapping a Type 1 FHB resistance on chromosome 4AS of Triticum macha and deployment in combination with two Type 2 resistances.
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DOI：
10.1007/s00122-015-2542-9
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发表时间：
2015-09
期刊：
影响因子：
--
通讯作者：
Nicholson P
中科院分区：
文献类型：
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作者：
Burt C;Steed A;Gosman N;Lemmens M;Bird N;Ramirez-Gonzalez R;Holdgate S;Nicholson P
已经产生了紧密侧接1型FHB抗性的标记，并且已经证明了将其与2型抗性组合以改善FHB控制的潜力。小麦对赤霉病的抗性通常分为两类：对初始感染的抗性（1型）和对穗部内传播的抗性（2型）。虽然已经报道了许多2型耐药的来源，但表征的1型耐药相对较少。先前的研究在马卡小麦4A染色体上鉴定了1型赤霉病抗性（QFhs.jic-4AS）。关于1型和2型耐药性结合对整体FHB症状或真菌毒素脱氧雪腐镰刀菌烯醇（DON）积累的影响知之甚少。QFhs.jic-4AS与两个2型FHB抗性（Fhb 1和一个与1BL/1 RS易位相关）独立组合。虽然结合1型和2型抗性通常减少视觉症状的发展，对DON积累的影响是微不足道的。缺乏多态性标记和有限数量的重组体最初阻碍了QFhs.jic-4AS抗性的准确定位。使用一系列最近产生的标记结合新的群体，QFhs.jic-4AS的位置已被确定，允许在育种计划中遵循这种抗性。本文的在线版本（doi：10.1007/s 00122 -015-2542-9）包含补充材料，可供授权用户使用。
Markers closely flanking a Type 1 FHB resistance have been produced and the potential of combining this with Type 2 resistances to improve control of FHB has been demonstrated. Two categories of resistance to Fusarium head blight (FHB) in wheat are generally recognised: resistance to initial infection (Type 1) and resistance to spread within the head (Type 2). While numerous sources of Type 2 resistance have been reported, relatively fewer Type 1 resistances have been characterised. Previous study identified a Type 1 FHB resistance (QFhs.jic-4AS) on chromosome 4A in Triticum macha. Little is known about the effect of combining Type 1 and Type 2 resistances on overall FHB symptoms or accumulation of the mycotoxin deoxynivalenol (DON). QFhs.jic-4AS was combined independently with two Type 2 FHB resistances (Fhb1 and one associated with the 1BL/1RS translocation). While combining Type 1 and Type 2 resistances generally reduced visual symptom development, the effect on DON accumulation was marginal. A lack of polymorphic markers and a limited number of recombinants had originally prevented accurate mapping of the QFhs.jic-4AS resistance. Using an array of recently produced markers in combination with new populations, the position of QFhs.jic-4AS has been determined to allow this resistance to be followed in breeding programmes. The online version of this article (doi:10.1007/s00122-015-2542-9) contains supplementary material, which is available to authorized users.