Karyotypes and C-values of Two Plantago Species from the QinghaiTibet Plateau, China

doi:10.7677/ynzwyj201514152

Abstract

Abstract:

The chromosome numbers, karyotypes and Cvalues of 18 populations of Plantago depressa and 2 populations of Plantago major from the QinghaiTibet Plateau, China, were reported in the present study. The results were as follows: the chromosome numbers of P. depressa populations from Yadong County and Nyingchi County of Tibetan Autonomous Region (TAR) were 2n=4x=24, other populations of Pdepressa and Pmajor were 2n=2x=12, and the basic chromosome number of all populations was x=6. All karyotype types were 1A, and the karyotype constitutions were not completely consistent with previous reported results. The 2Cvalue of Pdepressa was reported for the first time, and the 1Cxvaule tended to decrease with increasing ploidy levels. Meanwhile, the 2Cvalue of Pmajor was not identical with previous existing results. The results showed that the variation of 2Cvalue occurred at the interpopulation level of Pdepressa and Pmajor, also flow cytometry couldn′t be used to estimate the ploidy of the genus Plantago Linn.

Key words: Plantago depressa, Plantago major, QinghaiTibet Plateau, Karyotype, C-value

CLC Number:

Q 942

QIAN Min-, WANG Guang-Yan-, MENG Ying-, YANG Yong-Ping. Karyotypes and C-values of Two Plantago Species from the QinghaiTibet Plateau, China[J]. Plant Diversity, 2015, 37(4): 407-415.

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