Genetical dissection of H3-mediated polygenic PCN resistance in a heterozygous autotetraploid potato population

被引：30

作者：

J. Bryan G. ^{[1
]}

McLean K. ^{[1
]}

Pande B. ^{[1
]}

Purvis A. ^{[1
]}

A. Hackett C. ^{[2
]}

E. Bradshaw J. ^{[1
]}

Waugh R. ^{[1
]}

机构：

[1] Genome Dynamics Programme, Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, S.

[2] Biomathematics and Stat. Scotland, Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, S.

来源：

Molecular Breeding | 2004年 / 14卷 / 2期

基金：

英国生物技术与生命科学研究理事会;

关键词：

Bulked segregant analysis; Nematodes; PCN; Potato; Quantitative resistance; Tetraploid;

D O I：

10.1023/B:MOLB.0000037999.13581.9c

中图分类号：

学科分类号：

摘要：

Potato Cyst Nematodes (PCN) currently represent a serious threat to potato cultivation. However, many sources of resistance are known amongst primitive and wild relatives of cultivated potato, Solanum tuberosum ssp. tuberosum. Currently, in the UK, the major threat is due to Globodera pallida, resistance to which has not yet been effectively deployed in potato cultivars. We have performed linkage and QTL analysis of a tetraploid potato population segregating for the 'H3' source of resistance to G. pallida that was introgressed into cultivated potato from the primitive species, Solanum tuberosum ssp. andigena. This source is highly effective against the most common UK pathotype of G. pallida (Pa2/3) and its deployment in breeding material is a major goal. We adopted an approach involving bulked segregant analysis (BSA) as well as genome wide linkage analysis using AFLP and SSR markers. BSA provided a concentration of markers linked in coupling to a QTL on linkage group IV, and improved the accuracy of the QTL localisation. By performing an analysis on residual scores after removal of the effects due to the major QTL, we detected a second QTL on linkage group XI.

引用

页码：105 / 116

页数：11

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