Localization of QTLs for tolerance to Cercospora beticola on sugar beet linkage groups

被引:0
作者
R. Schäfer-Pregl
D. C. Borchardt
E. Barzen
C. Glass
W. Mechelke
J. F. Seitzer
F. Salamini
机构
[1] Max-Planck-Institut fuer Zuechtungsforschung,
[2] Carl-v.-Linné-Weg 10,undefined
[3] D-50829 Cologne,undefined
[4] Germany,undefined
[5] e-mail: schaefer@mpiz-koeln.mpg.de,undefined
[6] Fax: +49 221/50 62 413,undefined
[7] KWS,undefined
[8] Kleinwanzlebener Saatzucht AG,undefined
[9] Grimsehlstr. 31,undefined
[10] D-37555 Einbeck,undefined
[11] Germany,undefined
来源
Theoretical and Applied Genetics | 1999年 / 99卷
关键词
Keywords Resistance; Sugar beet; Leaf spot disease (Cercospora beticola); Genetic linkage map; QTLs;
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中图分类号
学科分类号
摘要
We present a new linkage map for sugar beet (Beta vulgaris) which has been developed using a population segregating for genetic factors that confer tolerance to the leaf spot fungus (Cercospora beticola), the causal factor of leaf spot disease in sugar beet). In the F2 population studied, a subset of 36 RFLP probes, mapping on eight out of the nine linkage groups of sugar beet, provided the anchor markers to assign chromosomes. A total of 224 markers, including RFLPs, AFLPs, SCARs and microsatellites, were mapped. Estimates of leaf damage in F2 and test-cross families were repeated at different stages of plant development. Each set of data was analysed as such. An average estimate was also considered. QTLs with highly significant LOD scores revealed both by the F2 and test-cross analyses were localized on linkage groups 2, 6 and 9. Linkage groups 4 and 5 gave a clear indication of the presence of a QTL only when F2 data were considered. One highly significant QTL with a LOD of 16.0 was revealed only by the data obtained under conditions of artificial inoculation. This QTL maps at position 90 on chromosome 3.
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页码:829 / 836
页数:7
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