Studies On Development Of Male And Female Gametophytes And Fertilization Of Vitis Quinquangularis Rehd And Distant Hybrids To Fructification Domino Offect

Vitis quinquangularis Rehd is a fruit tree that own higher economic benefits. But there was a bad phenomenon that the set fruit percentage was very low, and could not meet the requirement of normal production after large amount of artificial cultivation. According to observe and analyze of dioecism characteristic in Vitis quinquangularis Rehd and study on the development of male and female gametophytes, fertilization of Vitis quinquangularis Rehd and distant hybrids to fructification domino offect, prove up sexual reproduction regulation of Vitis quinquangularis Rehd and distant hybrids, find out the reason why set fruit percentage was low. The tendency of our test result offers some theoretical practical basis for the technique measure what advance the low fruit-set rate of Vitis quinquangularis Rehd and the feasibility of cross breeding.(1) According to observe configuration and morphology of male and female flower and male and female pollen of Vitis quinquangularis Rehd and study of pollens cultivate and insulate other pollens, the results indicated that Vitis quinquangularis Rehd is dioecism and in order to enhance high yield there is no other than hybridization male plant in production.(2) All the anthers are 4-microsporangiate, the tapetums belong to glandulartapetum and microspore tetrads are tetrahedral. Pollen grains of Vitis quinquangularis Rehd are 2-celled and the ovary is 2-loculus with 2 anatropous ovules in each; pollen grains of four distant hybrids are 3-celled and the ovary is...