Mapping QTL associated with Verticillium dahliae resistance in the cultivated strawberry (Fragaria × ananassa).
Mapping QTL associated with Verticillium dahliae resistance in the cultivated strawberry (Fragaria × ananassa).
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DOI：
10.1038/hortres.2015.9
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发表时间：
2015
影响因子：
8.7
通讯作者：
Harrison RJ
中科院分区：
文献类型：
--
作者：
Antanaviciute L;Šurbanovski N;Harrison N;McLeary KJ;Simpson DW;Wilson F;Sargent DJ;Harrison RJ
在大田条件下连续3个季节对分离抗黄萎病的八倍体草莓双亲杂交组合进行了筛选。平均枯萎病评分与多个QTL显著相关，这在所有年份都是显著的。与这些性状显著相关的标记被用来筛选抗病和感病表型已知的材料。抗性、耐性和感病材料与不同抗性等级中存在的标记总数之间存在明显的统计显著关系。在田间条件下，抗性QTL表现为加性效应。这些标记在栽培草莓种质中含量丰富，这表明，尽管标记数量很多，但通过标记辅助育种仍有可能获得明显的遗传收益。
A biparental cross of octoploid strawberry segregating for resistance to Verticillium dahliae, the causative agent of Verticillium wilt, was screened under field conditions for three seasons. Average wilt scores were significantly associated with multiple QTL, which were mostly significant across all years. Markers significantly associated with the traits were used to screen material with known wilt resistance and susceptibility phenotypes. A clear and statistically significant relationship was observed between resistant, tolerant and susceptible material and the total number of markers present in the different resistance classes. In field situations resistance QTL appear to behave in an additive manner. These markers are abundant in the cultivated strawberry germplasm indicating that, despite the large number of markers, clear genetic gain is possible through marker-assisted breeding.