大花蕙兰品种的染色体数目分析

Chromosome Analysis of Hybrid Cymbidium

对引进的33个大花蕙兰品种进行了染色体分析及倍性鉴定。结果表明,大花蕙兰栽培种中有二倍体、三倍体、四倍体,也有非整倍体,以三倍体品种居多,占45.5%,四倍体品种占30.3%,二倍体品种占21.2%,非整倍体品种占3%。通过同一杂交组合的染色体数目比较和具亲缘关系的品种间染色体数目比较,发现在大花蕙兰杂交育种中,会出现“二倍体×二倍体=四倍体”的现象。

Chromosome was analyzed on hybrid Cymbidium. The chromosome number of 33 varieties of hybrid Cymbidium are different, Which 7 varieties are diploid, 15 varieties are triploid, 10 varieties are tetraploid, and 1 variety is aneuploid. Further chromosome analysis on different varieties from the same cross or parentage rarities shows that the offspring of cross between diploid will possibility be tetraploid.