Anomalous Chromosomal Behaviour and Chromosomal Data in Some Members of Subclass Gamopetalae from District Hamirpur (H. P.), India

作者：Gupta Raghbir Chand; Kumari Kamlesh; Kaur Kuljit; Singh Vijay^*

来源：Cytologia, 2016, 81(1): 25-34.

DOI：10.1508/cytologia.81.25

• Cytology
• Gamopetalae
• Hamirpur
• Meiotic abnormality

The present study pertains to the cytomorphology of 19 species belonging to nine families of the subclass Gamopetalae from Hamirpur district (H. P.). Out of these, 5 species are new or varied chromosomes reports. Campanula benthamii (2n=2x=28) and Leucas hyssopifolia (2n=2x=22) are the first ever chromosome counts for the species. Spilanthes acmella (2n=6x=78) and Borreria articularis (2n=4x=52) are varied cytotypes. Meanwhile, the B chromosome is reported for the first time in Leucas lanata (2n=22+0-1B). Almost all of the accessions (with disparity in percentage) show laggards, chromosome stickiness and cytomixis from early prophase to telophase-II, leading to the formation of aneuploid cells or meiocytes with double the normal chromosome number. Such meiotic abnormalities produce unreduced pollen grains and reduce pollen viability.

• 出版日期2016-3