Identification of novel QTL for resistance to crown rot in the doubled haploid wheat population 'W21MMT70' x 'Mendos'

被引：55

作者：

Bovill, W. D.

Ma, W.

Ritter, K.

Collard, B. C. Y.

Davis, M.

Wildermuth, G. B.

Sutherland, M. W. ^{[1
]}

机构：

[1] Univ So Queensland, Ctr Syst Biol, Fac Sci, Toowoomba, Qld 4350, Australia

[2] Murdoch Univ, Western Australian Dept Agr, Murdoch, WA 6150, Australia

[3] Murdoch Univ, MPB CRC, State Agr Biotechnol Ctr, Murdoch, WA 6150, Australia

[4] Leslie Res Ctr, Queensland Dept Primary Ind, Toowoomba, Qld 4350, Australia

来源：

PLANT BREEDING | 2006年 / 125卷 / 06期

关键词：

Triticum aestivum; Fusarium pseudograminearum; QTL mapping; disease resistance;

D O I：

10.1111/j.1439-0523.2006.01251.x

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 [作物学];

摘要：

Crown rot (causal agent Fusarium pseudograminearum) is a fungal disease of major significance to wheat cultivation in Australia. A doubled haploid wheat population was produced from a cross between line 'W21MMT70', which displays partial seedling and adult plant (field) resistance to crown rot, and 'Mendos', which is moderately susceptible in seedling tests but partially resistant in field trials. Bulked segregant analysis (BSA) based on seedling trial data did not reveal markers for crown rot resistance. A framework map was produced consisting of 128 microsatellite markers, four phenotypic markers, and one sequence tagged site marker. To this map 331 previously screened AFLP markers were then added. Three quantitative trait loci (QTL) were identified with composite interval mapping across all of the three seedling trials conducted. These QTL are located on chromosomes 2B, 2D and 5D. The 2D and 5D QTL are inherited from the line 'W21MMT70', whereas the 2B QTL is inherited from 'Mendos'. These loci are different from those associated with crown rot resistance in other wheat populations that have been examined, and may represent an opportunity for pyramiding QTL to provide more durable resistance to crown rot.

引用

页码：538 / 543

页数：6

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