Molecular evolution and molecular mechanisms of higher degree of vernalization requirement in East Asian barley

栽培大麦是大约1万年前从野生大麦驯化而来的，野生大麦分布在近东到中亚地区。目前，大麦的种植面积遍布世界各地。许多温带谷物，包括大麦，都需要在一段时间内进行低温(春化)，以促进开花。在将栽培面积扩大到东亚的过程中，获得较高程度的冬季生长习性将被考虑为适应性。我试图阐明更高程度春化要求的实际进化和分子基础。本研究使用了大量从世界各地收集的栽培大麦材料。结果表明，通过重测序分析中发现的特定单倍型VRN基因座与新的与低温反应相对应的QTL之间的复杂互作，表达了较高的春化需求程度。

Cultivated barley has been domesticated about 10,000 years ago from the wild barley, which distributes across Near East to Central Asia. At present, the cultivation area of barley are spread across the world. Many temperate cereals including barley are necessary to be exposed low temperature for a certain period of time (vernalization) in order to promote flowering. Acquisition of higher degree of winter growth habit would be considered to adaptability in the process to expand the cultivation area to East Asia. I attempted to elucidate the actual evolutionary and molecular basis of higher degree of vernalization requirement. For the purpose of this study, large number of cultivated barley accessions collected from all over the world were used. As a result, the higher degree of vernalization requirement were expressed by the complex interactions of a particular haplotypes of VRN loci found in resequencing analysis and novel QTL corresponding to low temperature response.