12份连翘种质资源的核型参数分析

采用常规压片法对4个连翘属原种以及6个金钟连翘品种和2个朝鲜连翘品种的核型进行了分析。研究结果发现,除金钟连翘品种Goldrausch为四倍体（2n=4x=56）外,其余11份种质均为二倍体（2n=2x=28）,染色体基数为14。连翘、卵叶连翘、东北连翘、朝鲜连翘的核型分别为2A、3B、2B、3B型,6个金钟连翘品种的核型包括2A、2B、3B 3种,2个朝鲜连翘品种的核型包括2B、3B。12份连翘种质的着丝粒指数差异性不大,介于9.65%~50.00%,染色体类型以中部（m）、近中部（sm）以及近端部（st）染色体为主,未发现端部染色体和随体。结果表明,连翘和东北连翘的亲缘关系最近,与卵叶连翘...

Full description

Saved in:
Bibliographic Details
Published in植物遗传资源学报 Vol. 16; no. 1; pp. 178 - 184
Main Author 申建双 叶远俊 潘会堂 张启翔
Format Journal Article
LanguageChinese
Published 2015
Subjects
亲缘关系
染色体
核型参数
连翘属
Online AccessGet full text
ISSN1672-1810

Cover

More Information
Summary:采用常规压片法对4个连翘属原种以及6个金钟连翘品种和2个朝鲜连翘品种的核型进行了分析。研究结果发现,除金钟连翘品种Goldrausch为四倍体（2n=4x=56）外,其余11份种质均为二倍体（2n=2x=28）,染色体基数为14。连翘、卵叶连翘、东北连翘、朝鲜连翘的核型分别为2A、3B、2B、3B型,6个金钟连翘品种的核型包括2A、2B、3B 3种,2个朝鲜连翘品种的核型包括2B、3B。12份连翘种质的着丝粒指数差异性不大,介于9.65%~50.00%,染色体类型以中部（m）、近中部（sm）以及近端部（st）染色体为主,未发现端部染色体和随体。结果表明,连翘和东北连翘的亲缘关系最近,与卵叶连翘的亲缘关系最远,金钟连翘品种与东北连翘、朝鲜连翘之间亲缘关系较近。研究结果为连翘属种间、品种间杂交育种和亲缘关系研究提供了细胞学基础。
Bibliography:Forythia ; chromosome ; karyotye analysis ; genetic relationship
Karyotypes of twelve Forsythia species and cuhivars were studied using squashing method. The re- suits showed that eleven Forsythia species and cultivars were diploid （2n = 2x = 28 ）, except F. intermedia ＇ Gold- rausch＇ , which was tetraloid （2n = 4x = 56 ）. The karyotypes of F. suspensa, F. ovate, F. mandshurica and F. kore- ana were 2A, 3 B,2B, and 3 B, respectively. The karyotypes of six F. intermedia cultivars included 2A,2B and 3 B. The karyotypes of two F. koreana cultivars included 2B and 3 B. Generally, the centromere index of twelve Forsythia species and cuhivars were not distinctively different, which ranged from 9.65% to 50. 00%. The karyotypes of all the tested Forsythia taxa were mainly made of median region, submedian region and subterminal region, without telo- centric chromosome or satellite. The results from clustering analysis on karyotype parameters of the four Forsythia species showed that F. suspense and F. mandshurica had c
ISSN:1672-1810