Weed ecological studies on the range expansion and hybridizationof cogongrass, a perennial grass weed, resulted from globalwarming

香茅是一种多年生草本植物，其常见生态型主要分布在东北地区南部和日本南部，早期生态型主要分布在东北地区北部和北海道。对东北地区1980年代初、S和2009年至2011年收集的常见生态型和早期生态型进行了GOT酶谱分析和叶绿体DNAtrnL-F区多态性分析，以阐明全球变暖导致的常见生态型的范围扩大。普通生态型和早期生态型的杂交种在东北地区北部分布广泛

The common ecotype of cogongrass, a perennial grass, is distributed in southern parts of Tohoku region and southward, Japan and the early ecotype is mainly in northern parts of Tohoku region and Hokkaido. The common and early ecotypes collected in early 1980’s and 2009 to 2011 in Tohoku region were distinguished by GOT zymogram and trnL-F region polymorphism of chloroplast DNA to clarify range expansion of the common type resulted from global warming. The hybrids between the common and early ecotypes were widely distributed in northern parts of Tohoku region