5个芍药属伊藤杂种的倍性鉴定及核型分析

Ploidy Identification and Karyotype Analysis of Five Itoh Hybrid Peonies

采用常规压片法,对5个芍药属伊藤杂种进行了核型分析。结果表明:5个芍药属伊藤杂种的品种均为三倍体(2n=3x=15),核型不对称系数为61.02%~62.41%,核型类型均属于2A型,所有品种的核型均由中部(m)、近中部(sm)和近端部(st)的着丝粒染色体组成。本研究首次摸清了芍药属伊藤杂种的核型背景,为品种改良提供了细胞学资料。

We studied the karyotypes of five Itoh hybrid peonies by using squashing method. Five Itoh hybrid peonies were triploid（2n = 3x = 15 ）. Asymmetry index ranged in 61.02% -62.41% , and the karyotypes of these cuhivars were 2A. The karyotypes of the tested Itoh hybrid peonijes were mainly made of median region, submedian region and subterminal region, without satellite. Our result provided cytological information and polyploidy resources for breeding research for the first time.