Abstract:

The berry traits of 252 grape cultivars（including 111 cultivars of hybrids of Vitis vinifera
and V. labrusca，and 141 cultivars of V. vinifera）were investigated. Grape samples from veraison stage，
mature stage and full mature stage were collected and treated by immersing into the water，and then the
relationship between berry traits and the cracking rate was analyzed，and the cracking rates of the cultivars
of hybrids of V. vinifera and V. labrusca and V. vinifera were analyzed. The results showed that grape berry
cracking includes ring cracking，vertical cracking，vertical-ring cracking and crevasse cracking. The berry
cracking in V. vinifera was more serious than that in hybrids of V. vinifera and V. labrusca. Moreover，
grapes at mature stage have higher cracking rate than the other two stages，and cultivars with small grape
berry were easy to suffer from cracking，while cultivars with thick skin and soft flesh were not easy to
suffer from cracking. By studying the relationship between grape berry traits and berry cracking，we can
get insights into the mechanism of grape cracking. Moreover，it can provide guidelines for the reduction of
the cracking rate of grape and theoretical foundation for the selection of cultivars and parents in viticulture
and breeding.

Key words: grape, germpalsm resource, berry cracking, trait