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New progress in polyploid evolution in Banna Botanical Garden
Polyploidy plays an important role in evolution, but its contribution to diversity is still unclear. Previous studies were mostly based on simplified ploidy traits and sampling of smaller genera and species, ignoring the effect of polyploid frequency, and lack of in-depth research based on larger genera and species. Han tingshen, assistant researcher of biogeography and ecology research group of Banna botanical garden, together with the collaborators of Leipzig University in Germany, took Allium plants with high species diversity as the research object, and mainly verified two hypotheses: "whether polyploid frequency is positively correlated with species formation rate" and "whether the process is affected by ecology or character transformation". The results showed that the branches with higher polyploid frequency had higher speciation rate, and the process was significantly affected by ecological transformation, especially soil fertility transformation. This study revealed the role of polyploid frequency and ecological differentiation in promoting diversity, and provided a new perspective for the study of polyploid evolution. The research results are published online in the international academic journal New Physics with the title of polyploidy promoters species diversification of alliance through ecological shifts
(a) Phylogenetic tree of Allium L( b) The evolution rate of polyploid was higher than that of diploid( c) Polyploidy was significantly correlated with habitat differentiation.
  address:Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences. Menglun, Mengla, Yunnan 666303, China   
E-mail:ywxing@xtbg.org.cn