白菜型油菜与蓝花子杂交的初步研究-广西植物.pdfVIP

Guihaia　18 (1):54—57 1998 2　 吴沿友 (, , , 550002) 罗　鹏 (, 610064) 　　, (Brassica campestris) (Rap hanus sativus L.var.rap hanistroides Makino)。;, 。 :MI, 19 , , MI, 19 ; AII, 10-10-9 。;n=19 n=9、 n =10 。, 。 　;;; Preliminary study on hybridization between Brassica camp estris and Raphanus sativus L.var. R ap hanistroides Makino Wu Yanyou (Karst Eco-environment S tation f or Comprehensive Experimen t, S tate Key Laboratory of Environment Geochem istry , Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002) Luo Peng (Departmen t of Biolo y, S ichuan University, Chengdu 610064) Abstract　Through e bryo rescue, we successfully obtained the hybrid between Brassica camp estris L.and Raphanus sativus L.var.rap hanistroides Makino that has two kinds of flowers:one larger, the other s all- er.The larger-flowered has better fertility than the s aller-flowered.The observation on their eiosisshowed that the s aller-flowered was chro oso eundoubled.At MI, therewere 19 unpaired chro oso es.The larg- er-floweredwas the chro oso e-doubled or partly chro oso e-doubled hybrids.19 bivalentswere arranged on the equatorial plate of 　　Chro oso e-doubled hybrid, at MI.In PMCs of partly chro oso e-doubled hybrid, there occurred“chro oso e set fractionation” (10-10-9).The larger-flowered can produce so e nor al ga etes of n=19、 n=9、 n=10.Thus, they had so e fertility.Through“chro oso e set fractiona- 　1997-01-17 　:, , 1966 , (), 。 　　1 :　 55 tion”, sesquidiploids ay occur, which can bevery useful in chro os