Decaploidy in Rosa praelucens Byhouwer (Rosaceae) Endemic to Zhongdian Plateau, Yunnan, China

被引：60

作者：

Jian, Hongying ^{[1
]}

Zhang, Hao ^{[1
]}

Tang, Kaixue ^{[1
]}

Li, Shufa ^{[1
]}

Wang, Qigang ^{[1
]}

Zhang, Ting ^{[1
]}

Qiu, Xianqin ^{[1
]}

Yan, Huijun ^{[1
]}

机构：

[1] Yunnan Acad Agr Sci, Flower Res Inst, Key Lab Flower Breeding Yunnan Prov, Kunming 650205, Yunnan, Peoples R China

来源：

CARYOLOGIA | 2010年 / 63卷 / 02期

关键词：

decaploid; endemic; hybridization; karyotype; polyploidy; Rosa praelucens Byhouwer; RIBOSOMAL DNA; POLYPLOIDY; FLORA; L;

D O I：

10.1080/00087114.2010.10589722

中图分类号：

Q94 [植物学];

学科分类号：

071001 [植物学];

摘要：

Genus Rosa (Rosaceae) has a base chromosome number of x=7. Ploidy levels of wild species range from 2n =2x = 14 to 2n = 8x =56. In this paper, one decaploid, the highest naturally occurring ploidy never reported before in the genus was detected in the karyological study of an endemic wild species, R. praelucens Byhouwer to Zhongdian Plateau, Yunnan, China. Its karyotype formula was 2n= 10x =70 =2st + 6sm + 62m and the karyotype was 2B. Chromosome No. 6 was subterminal. Chromosome No. 15, No. 22 and No. 23 were submedian. According to its karyomorphology, R. praelucens derived not from auto polyploidization directly but from inter-specific hybridization. Polyploidization and inter-species hybridization both might have played important roles in the origin of R. praelucens associated with effect of high altitude environment. Further research on this species is warranted to provide helpful evidences to understand the differentiation and evolution of the Genus Rosa, and even clues to trace the process of speciation in Sino-Himalayan region.

引用

页码：162 / 167

页数：6

共 41 条

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