Analysis of Correlations Between Climate and Molecular AdaptiveEvolution of Wild Barley with Geographical Information Systems (GIS)

摘要

Climate is one of the most important factors determining the adaptive evolution of plants. In this study, 44different populations of wild barley were used as materials to analyze the diversity of 17 genes (495 sequences), in orderto study the influence of different climatic conditions on adaptive evolution of wild barley. A Geographical InformationSystem (GIS) provided tools to visually present and analyse the geographical distribution of number of variable positionsin the alignments and the differentiation index. 19 different bio factors were classified into 4 main component groups, andOLS Regression was used to analyze the differentiation coefficient of main climatic factors and the expression of genedifferentiation degree. DHN family, a drought and temperature related gene family, showed significant spatial correlationwith main climatic factors. Meanwhile, the results of other genes, which reported insignificant effects on drought or heattolerance, were quite contrary. The phenotypes of plants were observed after the interaction of plant genotype with theenvironment. Simultaneously, the environment also has influence on some special genes. New analysis methods usingGIS could be used to research the complex relationship between plant phenotype, plant genotype and the environment.