engleski

Genetic Variability of Grapevine Clones Assessed by Transposon-based Markers and Its Potential for Improving Conventional Clonal Selection

Traditional grapevine varieties have been arisen by spontaneous crosses centuries ago and their present populations are result of many generations of clonal propagation. Due to great multiplication over time and space the genotype of individual vines was exposed to spontaneous mutations. Consequently, varieties are not uniform but rather mixture of similar clones of different agronomic value. Conventional clonal selection is a long lasting procedure that aims to detect and propagate seldom vines that are from the perspective of winegrowing and market superior over the population. The problem: many of individual vines under selection have uniform genotype in spite of different phenotype. Several types of molecular markers have potential to detect genetic intravarietal variability and thus, enable breeders to detect unique mutant genotypes what can provide more rational clonal selection and clone identification tool. The clones resulting from individual clonal selection of two grape varieties (Plavac mali and Skrlet) have been analyzed in replicated trial for several agronomic traits. The contrast clones that showed significant differences in bunch size and yield per vine have been assessed by transposon-based markers that have been reported as very polymorphic and repeatable. Unexpectedly, in this study the level of genetic variability was rather low.

Grapevine; transposon-based markers; clonal selection

nije evidentirano