国家科技支撑计划 “华东区长核桃高效生产关键技术研究与示范”（2013BAD14B0104）, 浙江省重大科技专项“薄壳山核桃资源评价及新品种选育”（2012C12904-13）和安徽省科技攻关项目（150103079）共同资助。
The effects of different pollen sources on pecan nut setting and development were studied by testing 9 pollinating varieties on 5 pecan clones. The results showed that the male variance contribution rate of all 5 clones were higher than 50%. Pollination with different varieties significantly affected the nut setting of individual females. The interaction between parents was observed. All nut characters except nut weight between male parents had a highly significant deviation. There was a large variation among the 7 nut characters across all 45 crossings. The largest coefficient variation reached to 26.33% that was observed for the nut weight of the 21th clone, while the smallest one was 1.53% with the nut diameter of the 13th clone. We selected suitable pollination cultivars for the 5 females based on the nut setting and other characters of each of 5 individual clones. For example, the 35th clone and Janlin No.1 could be the pollen source for the 104th clone; the 1st clone, the 34th, and Janlin No.1 could be male plants for the 28th clone; the 5th and 127th clones for the 21th; the 34th and 6th clones for the 13th; the 35th and 52th and Jianlin No.1 clones for the 11th as pollinating plants.