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[Objective] This study aimed to explore the relationship between self-incompatibility strength and characteristics related to pollination and fertilization of different apricot varieties in Xinjiang. [Method] The pollen amount,pollen germination rate,pollen tube growth status and fruiting setting rate by self-pollination of 34 apricot cultivars in Xinjiang were determined,to analyze the self-incompatibility of different apricot cultivars. [Result] The average pollen amount per anther of 34 apricot cultivars was 1 213. 7,and the average pollen germination rate was 46. 0%. There were great differences in the self-incompatibility of different cultivars; most pollen tubes of the cultivars with high self-incompatibility stopped elongating at 1 /3 or 1 /2 part of the styles,and only a few pollen tubes of the cultivars with low self-incompatibility reached the ovary,and the normal fertilization ratio was significantly lower than that in self-compatible cultivars. [Conclusion]Among the 34 apricot cultivars,only 6 cultivars were self-compatible and the others exhibited gametophyte self-incompatibility. In addition,the fruit setting rate by self-pollination was low.
[Objective] This study aimed to explore the relationship between self-incompatibility strength and characteristics related to pollination and fertilization of different apricot varieties in Xinjiang. [Method] The pollen amount, pollen germination rate, pollen tube growth status and fruiting setting rate by self -pollination of 34 apricot cultivars in Xinjiang were determined, to analyze the self-incompatibility of different apricot cultivars. [Result] The average pollen amount per anther of 34 apricot cultivars was 1 213. 7, and the average pollen germination rate was 46. 0%. There were great differences in the self-incompatibility of different cultivars; most pollen tubes of the cultivars with high self-incompatibility stopped elongating at 1/3 or 1/2 part of the styles, and only a few pollen tubes of the cultivars with low self-incompatibility reached the ovary, and the normal fertilization ratio was significantly lower than that in self-compatible cultivars. [Conclusion] Among the 34 apri cot cultivars, only 6 cultivars were self-compatible and the others exploitation gametophyte self-incompatibility. addition, the fruit setting rate by self-pollination was low.