中国栎属九种植物的核型分析

A karyotype analysis of 9 species of the Quercus from China

报道了中国栎属 ( Quercus L inn.) 9种植物的核型。结果如下 :帽斗栎 ( Q.guyavaelofia) :2 n=2 4 =2 2 m+2 sm,属于“1A”类型 ;富宁栎 ( Q.setulosa) :2 n=2 4 =2 0 m+4sm,属于“2 A”类型 ;炭栎 ( Q.utilis) :2 n=2 4 =2 4 m,属于“2 A”类型 ;乌冈栎 ( Q.phillyraeoides) :2 n=2 4 =2 0 m+4sm,属于“2 B”类型 ;匙叶栎 ( Q.dolicholepis) :2 n=2 4 =2 0 m+4sm,属于“2 B”类型 ;岩栎( Q.acrodonta) :2 n=2 4 =2 2 m+2 sm,属于“2 B”类型 ;麻栗坡栎 ( Q.marlipoensis) :2 n=2 4 =2 4 m,属于“1B”类型 ;锥连栎 ( Q.franchetii) :2 n=2 4 =2 2 m +2 sm ,属于“1B”类型 ;麻栎 ( Q.acutissima) :2 n=2 4 =2 0 m+4sm,属于“2 B”类型 .其中除麻栎外 ,另 8种的核型系首次报道。研究结果表明 ,上述核型在种间较相似 ,但以组为单位进行比较时 ,则有一定的价值 ,有可能为揭示栎属的系统演化提供新的证据。

In the present paper,the karyotypes of 9 species of the genus Quercus were reported.The results were as follow:the karotype formula of Q. Guyavaefolia is 2n=24=22m+2sm, belonging to “1A” of Stebbins; the karyotype formula of Q. setulosa is 2n=24=20m+4sm,belonging to “2A”of Stebbins;the karyotype formula of Q.utilis is 2n=24=24m, belonging to “2A” of Stebbins;the karyotype formula of Q. phillyraeoides is 2n=24=20m+4sm,belonging to “2B” of stebbins;the karyotype formula of Q. dolicholepis is 2n=24=20m+4sm, belonging to “2B” of Stebbins; the karyotype formula of Q. acrodonta is 2n=24=22m+2sm,belonging to “2B” of Stebbins; the karyotype formula of Q. marlipoensis is 2n=24=24m,belonging to “1B” of Stebbins; the karyotype formula of Q. franchetii is 2n=24=22m+2sm, belonging to “1B” of Stebbins; the karyotype formula of Q. acutissima is 2n=24=20m+4sm, belonging to “2B” of Stebbins. Except for Q. Acutissima , eight of them were reported for the first time.The karyotypes were very similar to each other among the above species,and comparision between sections was more important than that between species.