蜂糖李授粉品种初步筛选OA北大核心CSTPCD

Selection of pollinizers is the key to fruit set and high yields in most of the fruit crops including plums.To select suitable pollinizer for Fengtang plum,the genotyping of t S-RNase was conducted and the flowering period,pollen germination rate of Fengtang plum,and fruit set of Fengtang plum pollinated by potential pollinizers were investigated.The results showed that:the S-genotype of Fengtang plum was the same as that of Siyue plum,but different from those of Fenghuang plum,Bingcui plum,and as well as Cuihong plum.The flower period of Fengtang plum was coincided with that of Fenghuang plum and Yinhong plum,while Siyue plum bloomed at the beginning of the flowering period of Fengtang plum,and Bingcui plum bloomed at the end of the flowering period of Fengtang plum.The germination rates of shade-dried pollen at room temperature ranged from 13.4%to 23.8%.There were no significant differences in germination rates among pollens of Fengtang plum,Siyue plum,Fenghuang plum and Bingcui plum grown in the same orchard.There was no significant difference in pollen vigor of Fengtang plum and Siyue plum grown in different orchards,and there was no significant difference in pollen germination rate between Cuihong plum and other plums.After constant drying at 25℃,pollen germination rate of Cuihong plum was as high as 81.1%,significantly higher than that of other plums,and there was no significant difference in the pollen germination rate among other plums,which were all above 60%;compared with the natural pollination,Siyue plum pollination and self-pollination,Fengtang plum pollinated with pollens of Cuihong plum,Fenghuang plum and Bingcui plum showed significantly increased fruit set.The solid-acid ratio,sugar-acid ratio,vitamin C content,and good seed rate were significantly improved in Fengtang plum pollinated with pollens of Fenghuang plum.These results suggested that:pollinizers with different S genotypes could significantly increase the fruit set.Fenghuang plum,with different S genotypes,overlapped flowering period,and high pollen viability,was an excellent pollinizer for Fengtang plum.The results of this study can be used as a reference for the breeding of Fengtang plum,the selection of pollinizers and pollen for pollination.