Determination of pollen viability of tea varieties inGuangxi（country）and preliminary report on interspecific hybridization

In order to advance tea resources and breeding efficiency in Guangxi， we tested pollen vitality and researched interspecific artificial hybridization pollination of 8 good tea varieties（national level）. The results showed that the vitality ranged from 31.8% to 74.24%， the Guilv 1 st had the highest with 74.24%， the Guixiang 22 st and Yaoshan xiulv had 69.15% and 68.15% respectively， the Guihong 4 st had the lowest. The pollen vitality showed significant differences among different varieties. The maturing rate of 8 hybridized combination was from 5.0% to 28.5%， averaged 16.0%. The maturing rates of hybridized combination using Guilv 1 st and Guixiang 22 st as male perent were higher than that of using Fuyun 6 st and Fuding white tea as male parent. The crossbreeding compatibility of Fuding white tea hybridized with Guilv 1 st and Guixiang 22 st was higher than that of Fuyun 6 st . According to the fruit traits， the Guilv 1 st × Funyun 6 st ， Guilv 1 st × Fuding white tea， and Funyun 6 st ×Guilv 1 st showed excellent traits， they exceeded their parents.