Karyotype and evolutionary trend analysis of Scutellaria species in Jinyun mountain, Chongqing

Traditional squash method was used to analyze chromosome number and karyotypes of four Scutellaria species in Chongqing Jinyun Mountain Natural Reserve： Scutellaria tsinyunensis, S.yunnanensis, S.franchetiana and S.indica.The result showed that the chromosome numbers were 26 except for S.franchetian...

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Bibliographic Details
Published inZhongguo zhongyao zazhi Vol. 41; no. 12; p. 2201
Main Authors Zong, Xiu-Hong, Deng, Hong-Ping, Huang, Qin, Yang, Mou, Li, Yun-Ting
Format Journal Article
LanguageChinese
Published China 01.06.2016
Subjects
Biological Evolution
China
Diploidy
Karyotype
Scutellaria - classification
Scutellaria - genetics
evolutional trend
Scutellaria
chromosome
karyotype analysis
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Summary:Traditional squash method was used to analyze chromosome number and karyotypes of four Scutellaria species in Chongqing Jinyun Mountain Natural Reserve： Scutellaria tsinyunensis, S.yunnanensis, S.franchetiana and S.indica.The result showed that the chromosome numbers were 26 except for S.franchetiana, which had 24 chromosomes.These species were all diploid with metacentric and submetacentric chromosomes.Their karyotypes were symmetrical and primitive.The karyotype formula of S.tsinyunensis is 2n=2x=26=24m+2sm, 1B type, As.k=55.28%; the karyotype formula of S.yunnanensis var.salicifolia is 2n=2x=26=26m, 1B type, As.k=56.11%; the karyotype formula of S.franchetiana is 2n=2x=24=20m+4sm, 2B type, As.k=58.50%; the karyotype formula of S.indica is 2n=2x=24=20m+4sm, 2B type, As.k=58.41%.The results were compared with the reported data of S.baicalensis and S.alaschanica.S.alaschanica is expected to be the most advanced one whereas S.tsinyunensis, and S.yunnanensis var. salicifolia primitive.These results are expected to provide some references to the origin and differentiation of genus Scutellaria.
ISSN:1001-5302
DOI:10.4268/cjcmm20161205