Research On The Evolution Of Ecotypes Of Wheat Cultvars And Differences Of Regions In Jiangsu

Wheat cultvars is essential to the development of the production and theinevitable trend in species replacement process, Some characters do not meet thedemand of production of varieties has been replaced, and Some traits outstandingperformance of varieties to be updated. Wheat variety of ecotypes, spring, transitionaland winter, there is a strong sub-winter, winter, half winter, Strong spring and springtypes and corresponding to the climatic and ecological conditions.Ecologicalresources varieties of crops ecological research as an important element, and Wheatecotypes of wheat ecological ecological research base. In recent years, along withcrops of climate and ecological studies, the rise evolution of ecotypes of wheatcultvars as wheat ecological laws and the wheat varieties ecological adaptability of animportant element, receiving increased attention and concern. The rational use andgiving full play to the ecological varieties adaptive advantage, Climate resources andwheat varieties resources can be fully rational use of the wheat production inimportant ways.Such as the maturity demonstrated wheat climatic conditions of the closerelationship Wheat constitutes Division types of conditions and basis. Therefore, thevariety of resources and the evolution of ecotypes in different wheat intervaldifference analysis is of great significance and representativeness. Based on the timesequence of Jiangsu wheat varieties using updated data, Through the study area from1978 to 2005 has promoted 288 wheat varieties To reflect the growth characteristicsof the wheat winter, semi-winter, migraine spring, spring four ecological indicators,To reflect the same time, sooner or later the maturity which mature early, late, early, late-maturing five ecological indicators. Mathematical model analysis of wheatcultvars ecotypes evolution, through the 2005-2006 study of five wheat-522 samplesof wheat Ecological Survey, take hypothesis testing statistical methods to the analysisof the regional differences were significant problems1 while wheat cultvars, and late-maturing varieties of early maturing varietiescan not meet the needs of production, gradually been eliminated, while early varietiesto be preserved.2, winter varieties in the 1991-1993 larger the dynamic changes, in 1988 and1990, a greater degree of dynamic change for 0.66 mid-late varieties in 1994 1996 tothe dynamic changes of 0.66 degrees.3, the main varieties of a single region is Zhenjiang, Xuzhou, Suqian, Suzhouand Wuxi. In Zhenjiang, only precocious main species, Xuzhou, Suqian, Suzhou andWuxi only spring main species. Yancheng the 08 types, Nanjing China precocioustypes and varieties of winter Huaiyin varieties change in the rate significantly higherthan other regions.4, the difference between the wheat, Huaibei to wheat and wheat and Taihuhilly Lixiahe wheat and wheat varieties ecological differences in the proportion of themost notable. In all significant difference between the different wheat types and thedifferent ecological, Hilly areas for wheat and wheat for the Taihu Lake area ofsemi-winter varieties proportion of the most notable differences, the value of 5.23. Inall the difference was not significantly different wheat types and the differentecological, Shamai river and the high hills and areas for wheat for the winter varietiesproportion of the difference was not significant, the value of 0.14.5, uses the fuzzy mathematical generalization judgment law appraisal wheatvariety winter vernality and the mature period frequency ecology compatible question,after calculates MinB=0.1644, indicated in theresearch area wheat variety changeprocess the variety frequency reluctantly adapts the current climate ecologicalcondition.