Clonal selection and evaluation to improve production of Cabernet Sauvignon grapevines in South Australia

Abstract

The field performance of selections of Cabernet Sauvignon was evaluated from 1958 to 1988, with the aim of improving yields by visual selection of healthy, vigorous, productive clones from aged, productive vineyards within a district, and by systematic comparison of these clones with candidates from other districts, States, and countries. There were 9 clonal comparison trials, with reference clones provided by results from preceding trials. High yield (5-10 kg/vine) had little effect on juice composition, and performances of high-yielding selections in a range of areas were identified. These clones (SA 125, BVRC 17, G9V3, LC 10 and CW 44) have been established in Registered Source Areas and their cuttings distributed to the grapegrowing industry through the South Australian Vine Improvement Program. Single-vine plots with 10-20 replicates were suggested for more rigorous statistical separation of clones. It is desirable to test clones in the districts where they were selected and where they are to be planted.