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

秋草是一种多年生草本植物，其常见生态型主要分布在日本东北地区南部和南部，早期生态型主要分布在东北地区北部和北海道。对20世纪80年代初和2009 ~ 2011年在东北地区采集的普通型和早期生态型进行了GOT酶谱和叶绿体DNA trnL-F区多态性的区分，以阐明全球变暖导致的普通型范围扩大。普通生态型与早期生态型的杂交品种广泛分布于东北地区北部

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