Flowering characteristics and breeding system of Aerides rosea
[Objective]This study,with an investigation of the breeding system of the Aerides rosea,is aimed to provide theoretical basis for the protection of its germplasm resources.[Method]The floral characteristics and flowering process of A.rosea under greenhouse cultivation conditions were carefully observed and recorded before the breeding characteristics were studied through the detection of pollen viability and stigma acceptability,and the estimation of hybridization index(OCI)and test of artificially pollination.[Result](1)A.rosea blossomed from May to July with fragrance and the florescence of a single plant lasted about 15 d and that of a single flower lasted about 10 d,with the bud stage being 1-5 d before flowering,the initial flowering stage of 1-4 d after flowering,the full flowering stage of 5-6 d after flowering,the final flowering stage of 7-8 d after flowering,and the fade stage of 9-10 d after flowering.(2)A.rosea belonged with raceme with each plant having 1-4 inflorescences which were featured as long and densely packed with dozens of flowers,with a consistent flowering period throughout the entire plant.(3)During the bud stage before flowering,the pollen already displayed viability and stigma pollinability which reached the highest at 5-6 d of flowering and the OCI of A.rosea was 4.(4)The fruit set rate was 0 without artificial pollination,while the fruit set rate for those with artificial self-pollination,artificial cross-pollination of the same plant and artificial cross-pollination of the different plants was 85.71％,88.00％and 84.00％respectively,higher than the ones without artificial pollination.[Conclusion]The flowering of A.rosea started in early May and ended at the end of July with a relatively short flowering period of about 2 d and the breeding system was a mixed mating system of self-pollination and cross-pollination that required pollinators to mix.[Ch,6 fig.3 tab.22 ref.]
Aerides roseaflowering processpollen viabilitystigma acceptabilitybreeding systemhybridization index
万方数据
维普
