海南隔距兰属植物6个种的核型分析

A Karyological Study of Six Species of Cleisostoma from Hainan

摘要: 采用压片法对海南产隔距兰属植物6个种,即:大序隔距兰Cleisostoma paniculatum(ker-Gawl.)Garay、短序隔距兰C.striatum(Rchb.f.)Garay、短茎隔距兰C.parishii(Hook.f.)Garay、金塔隔距兰C.filiforme(Lindl.)Ga-ray、尖喙隔距兰C.rostratum(Lodd.)Seidenf.、红花隔距兰C.williamsonii(Rchb.f.)Garay的染色体数目和核型进行了研究。结果如下:大序隔距兰2n=2x=38=36m+2sm;短序隔距兰2n=2x=38=2M+36m;短茎隔距兰2n=2x=38=2M+34m+2sm;金塔隔距兰2n=2x=38=38m;尖喙隔距兰2n=2x=38=36m+2sm;红花隔距兰2n=2x=38=34m+4sm(2SAT)。主要由正中部着丝点区染色体组成。除尖喙隔距兰核型分类为1A型外,其他的都为1B型。

Abstract: The chromosome number and karyotype of six species in Cleisostoma from Hainan were studied by applying root tip squash method.The results showed that the Cleisostoma paniculatum(ker-Gawl.) Garay 2n=2x=38=36m+2sm,C.striatum(Rchb.f.) Garay 2n=2x=38=2M+36m,C.parishii(Hook.f.) Garay 2n=2x=38=2M+34m+2sm,C.filiforme(Lindl.) Garay 2n=2x=38=38m,C.rostratum(Lodd.) Seidenf 2n=2x=38=36m+2sm and C.williamsonii(Rchb.f.) Garay 2n=2x=38=34m+4sm(2SAT).Its karyotype mainly consists of metacentric chromosomes.All of the karyotypes belong to 1B type except the C.rostratum(Lodd.) Seidenf is 1A.