Researches on configuration of late-maturing Camellia oleifera cultivars promoted in Hunan province
This study used four main cultivars of Camellia oleifera promoted in Hunan Province as test ma-terials.Investigate the flowering period and conduct artificial pollination experiments,designing a total of 16 cross pollination combinations for 4 Camellia oleifera cultivars,including reciprocal cross pollination and nat-ural pollination.Pollen vitality,fruit set rate,fruit development,economic traits of the fruit,kernel oil content,seed oil content,fruit oil content and fatty acid composition were determined to identify the best cultivar combinations.The results showed that the peak flowering periods of the three excellent Camellia oleifera cul-tivars,'Hengdong Datao 2','XL 1',and'Huashuo',overlapped with each other for a long time,ranging from 15 to 19 days.The peak flowering period of'XL 27'and'XL 1'overlaps for a longer period of 15 days;The polli-nation of'Hengdong Datao 2'with'Huashuo'as the paternal parent resulted in a high fruit setting rate,larger and heavier fruit,and significantly higher fruit oil content than other combinations;The fruit setting rate of the male parent'Hengdong Datao 2'pollinated with'Huashuo'is high,with significantly higher single fruit weight,fresh seed weight,and dry seed weight than other combinations.The two can be pollinating trees for each other;In addition,'XL 1'can be used as a pollinating tree for'Huashuo'.The kernel rate in fresh seed,kernel rate in dry seed,hundred-seeded weight of ♀'XL 1'×♂'XL 27 fruits were significantly higher than other com-binations,and the fruits were larger with the highest seed oil content;On the basis of improving the pollina-tion and fruiting rate of'XL 27',the pollen of'XL 1'significantly increased the fresh seed and kernel yield of pollinated fruits compared to other combinations.Therefore,'XL 1'and'XL 27'can be pollinating trees for each other;Additionally,♀'Hengdong Datao 2'×♂'XL 1'has a high fruit setting rate and excellent fruit charac-teristics,and can also be recommended as a variety configuration combination.
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