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Title:: Effect of Pollen Viability and Stigma Receptivity of Juglans hopeiensis Hu to Fruit Setting

Author(s):: CHEN Menghua1; ZHAO Dan1; JIN Lixin1; ZHANG Xuemei1; 2; LI Baoguo1; 2; GU Yuhong2; 3; （1.College of Forestry，Agricultural University of Hebei，Baoding，Hebei 071000；2.Research Center for Walnut Engineering and Technology of Hebei，Xingtai，Hebei 054000；3.College of Life Science，Agricultural University of Hebei，Baoding，Hebei 071000）

Keywords:: Juglans hopeiensis Hu; pollen viability; stigma receptivity; fruit setting

Abstract:: In order to find out the intrinsic factors of influencing fruit setting in Juglans hopeiensis Hu，7 cultivars J.hopeiensis Hu were used as materials，pollen viability，stigma receptivity and fruit setting condition of different pollination combination were analysed.The results showed that ‘Baihuashan’，‘Maisui Hutou’，‘Jixin’ and ‘Bai Shizitou’ whose pollen viability were low，only between 23.25% and 28.52%，when they were used as male parent,‘Mopan Shizitou’，‘Panlongwen Hutou’ and ‘Nanjiangshi’ were used as female parent respectively,the highest fruit setting rates of pollination combinations whose male parent was ‘Jixin’，respectively were 5.31%，11.19% and 8.98%.They were higher than other F1.At different times in female flowers open，‘Mopan Shizitou’，‘Panlongwen Hutou’ and ‘Nanjiangshi’ whose stigma receptivity in full-bloom stage were the highest,when they were used as female parent，‘Jixin’ was used as male parent，the fruit setting rates of these combinations in full-bloom stage for pollination were the highest，respectively were 4.98%,11.93% and 7.74%.They were significantly higher than that in the early stage and folding stage.