论文部分内容阅读
1980年,在具有正常节间(NI)的‘主流’甜瓜(Cucumis melo.L.)中,发现了一个短节间(SI)突变体,定名为‘主矮’(Main Dwarf)。和主流相比,除节间短(即短蔓)外,叶子较小且绿色较浓,果实也较小.从1984～1988年,主矮和13个正常节间品种和6个短节间品种分别进行了杂交,并对其杂交后代进行了观察和分析.不管主矮是和正常节间品种杂交,还是和短节间品种杂交,F_1代节间均正常.主矮与正常节间品种杂交.F_2代中正常节间植株和短节间植株以3:1的比率分离,其 F_1代与主矮回交的后代中,正常节间植株和短节间植株以1:1的比率分离.主矮与短节间品种杂交,F_2代中正常节间植株和短节间植株以9:7的比率分离;其 F_1代与主矮回交的后代中,
In 1980, a “short cut” (SI) mutant was identified in ’Mainstream’ melons with normal internodes (NI), designated Main Dwarf. Compared with the mainstream, except for the short internodes (ie, short vines), the leaf is smaller and the green is thicker and the fruit is smaller. From 1984 to 1988, the main short and 13 normal internode varieties and 6 short internodes The hybrids were crossed and their hybrid progenies were observed and analyzed.No matter the main short and normal internode hybrids or hybrids with the short internode, F_1 generation internodes were normal.The main short and normal internode varieties The normal internode plants and short internode plants in F_2 generation were separated in a ratio of 3: 1, and the normal internode plantlets and short internode plants were separated by a ratio of 1: 1 . The main dwarf and short internode hybrids, F_2 generations of normal internode plants and short internodes plants to 9: 7 ratio separation; the F1 generation and the main short backcross progeny,