QTL analysis of flowering time and ripening traits suggests an impact of a genomic region on linkage group 1 in Vitis.

In the recent past, genetic analyses of grapevine focused mainly on the identification of resistance loci for major diseases such as powdery and downy mildew. Currently, breeding programs make intensive use of these results by applying molecular markers linked to the resistance traits. However, modern genetics also allows to address additional agronomic traits that have considerable impact on the selection of grapevine cultivars.

QTL mapping of black rot (Guignardia bidwellii) resistance in the grapevine rootstock 'Börner' (V. riparia Gm183 × V. cinerea Arnold).

In the grapevine cultivar 'Börner' QTLs for black rot resistance were detected consistently in several independent experiments. For one QTL on chromosome 14 closely linked markers were developed and a detailed map provided. Black rot is a serious grapevine disease that causes substantial yield loss under unfavourable conditions.

Candidate genes within a 143 kb region of the flower sex locus in Vitis.

Wild Vitis species are dioecious plants, while the cultivated counterpart, Vitis vinifera subspec. vinifera, generally shows hermaphroditic flowers. In Vitis the genetic determinants of flower sex have previously been mapped to a region on chromosome 2.

Rpv10: a new locus from the Asian Vitis gene pool for pyramiding downy mildew resistance loci in grapevine.

A population derived from a cross between grapevine breeding strain Gf.Ga-52-42 and cultivar 'Solaris' consisting of 265 F1-individuals was genetically mapped using SSR markers and screened for downy mildew resistance. Quantitative trait locus (QTL) analysis revealed two strong QTLs on linkage groups (LGs) 18 and 09.