Karyotype Analysis of Gazania rigens Varieties
| Autor: | Yangqing Wu, Yazhou Zhang, Dongxu Wang, Xiao Ping Lu, Jiashi Zeng, Xiaoyu Guo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Chromosome number Ecology biology Renewable Energy Sustainability and the Environment Gazania rigens Chromosome Karyotype Genetic relationship Plant Science lcsh:Plant culture biology.organism_classification 01 natural sciences Biochemistry Genetics and Molecular Biology (miscellaneous) 03 medical and health sciences 030104 developmental biology Botany karyotype analysis lcsh:SB1-1110 chromosome Ecology Evolution Behavior and Systematics Phylogenetic relationship 010606 plant biology & botany |
| Zdroj: | Horticultural Plant Journal, Vol 2, Iss 5, Pp 279-283 (2016) |
| ISSN: | 2468-0141 |
| DOI: | 10.1016/j.hpj.2016.07.004 |
| Popis: | For studying species origin, systematic evolution and phylogenetic relationship of Gazania rigens, four different G. rigens varieties, with different flower colors, were subjected to chromosome karyotype analysis. The somatic chromosome number in three varieties ‘Hongwen’, ‘Xingbai’ and ‘Richu’ was 2n = 10, while in ‘Zhongguo Xunzhangju’ it was 2n = 20. We speculate that the cardinal number of chromosomes in G. rigens plants is x = 5, in which case ‘Zhongguo Xunzhangju’ is a tetraploid. The karyotype formulae of ‘Hongwen’, ‘Xingbai’ and ‘Richu’ were 2n = 8m + 2sm, 2n = 8m + 2sm and 2n = 10m respectively. The karyotype formula of ‘Zhongguo Xunzhangju’ was 2n = 18m + 2sm. The asymmetrical karyotype coefficients of the four G. rigens varieties ranged from 53.80% to 58.84%. Only ‘Richu’ had a ‘1A’ karyotype, while the others were relatively symmetric ‘2A’. Karyotype analysis indicates that the three introduced varieties have a close genetic relationship. |
| Databáze: | OpenAIRE |
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