Delineation of a scab resistance gene cluster on linkage group 2 of apple

被引：13

作者：

Bus, V ^{[1
]}

van de Weg, WEV ^{[1
]}

Durel, CE ^{[1
]}

Gessler, C ^{[1
]}

Calenge, F ^{[1
]}

Parisi, L ^{[1
]}

Rikkerink, E ^{[1
]}

Gardiner, S ^{[1
]}

Patocchi, A ^{[1
]}

Meulenbroek, M ^{[1
]}

Schouten, H ^{[1
]}

Laurens, F ^{[1
]}

机构：

[1] HortRes, Hawkes Bay Res Ctr, Havelock N, New Zealand

来源：

PROCEEDINGS OF THE XITH EUCARPIA SYMPOSIUM ON FRUIT BREEDING AND GENETICS, VOLS 1 AND 2 | 2004年 / 663期

关键词：

Venturia inaequalis; genetic markers; breeding strategy;

D O I：

10.17660/ActaHortic.2004.663.3

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

With the advent of genetic maps for apple that carry common transferable markers, it is possible to investigate genomic relationships between genes present in different accessions. Co-dominant markers, such as microsatellites, are particularly useful for this purpose. In recent years, genetic markers have been developed for a number of resistance genes for apple scab (Venturia inaequalis). In this paper, we present the discovery of a new scab resistance gene (Vh8) that maps to linkage group 2 (LG2). We then bring together the findings from different research groups on other scab resistance genes that also map to LG2 in an attempt to delineate their arrangement. These other genes comprise major genes (Vh2, Vr, Vbj and Vr2), as well as several race specific quantitative trait loci (QTLs) from 'Discovery' and 'TN10-8'. Results indicate that Vh2 and Vr are probably identical, and that Vh2/Vr, Vh8, Vbj and at least one of the QTLs are closely linked to each other on the lower half of LG2. A putative map of this gene cluster is presented. The fourth major gene, Vr2, maps at a significant distance from this gene cluster at the top end of LG2. We discuss the consequences of resistance gene cluster arrangements on breeding strategies for durable resistance to apple scab and the use of marker-assisted selection.

引用

页码：57 / 62

页数：6

共 8 条

[1] Marker assisted selection for pest and disease resistance in the New Zealand apple breeding programme [J].