Propagation of Vitis Champini Planchon CV Ramsey. Seasonal and Temperature Effects in Comparison with V. Vinifera L. CV Sultana

Abstract

The dependence of successful propagation of hardwood cuttings of Ramsey on cane morphology and several environmental factors is examined, and compared with that of Sultana. Successful propagation of Ramsey requires release of organic dormancy and a relatively high culture temperature (c. 25°C). Comparison of Ramsey with Sultana reveals that Ramsey requires longer cold treatment for release of bud dormancy and higher temperatures for root development. The variance of the number of days to root emergence is greater for cuttings selected from light canes than for those selected from heavier, more vigorous canes. This effect is independent of parent vine vigor. With the possible exception of cane weight, none of the morphological characters examined provides a useful measure of predicted cutting performance.