陕西小麦品种生态亚型的分类

对陕西5个麦区大面积推广的小麦品种(系),采用模糊聚类法将供试小麦品种分成:春性品种生态亚型、弱春性品种生态亚型、偏春性品种生态亚型、偏冬性品种生态亚型、弱冬性品种生态亚型、冬性品种生态亚型、强冬性品种生态亚型等7个生态亚型.陕北麦区主要种植强冬性和冬性品种生态亚型;陕南麦区主要种植春性和弱春性品种生态亚型.

A STUDY OF WHEAT CULTIVAR SUBECOTYPE IN SHAANXI

According to ecological conditions of nature,cultivation and farming of Shaanxi province,the region of autumn wheat of the province can be divided into five sections,i.e.North of Shaanxi,South of Shaanxi,West of Shaanxi,the five North Counties and East of Shaaxi.Taking as materials the major wheat cultivars which are grown in the five sections now and mainly planted in Central Shaanxi Plain from 1940s to 1990s,twenty characters as tilling trends,growth duration,plant height elements,spike characteristics,yields of grain and biomass,economic coefficient and winter-spring characteristics,have been studied.All materials are divided into seven subecotypes.The names are spring cultivar subecotype;weak spring cultvar subecotype;partial-spring cultivar subecotype;partial-winter cultivar subecotype;weak winter cultvar subecotype,winter cultivar subecotype and strong winter cultivar subecotype.There are cultivar subecotypes of strong winter and winter Wheat planted in North of Shaanxi.Cultivar subecotype of spring and weak spring wheat mainly planted in South of Shaanxi.The fact regarding transition ecotype,partial spring and partial winter,as major and seven subecotypes were simultaneous occured in central Shaanxi plain,including West of province,the five North counties and the East of the province.The result coincided with that of ecological classification of entire nation wheat cultivar and with suitable scatted region of all materials.It could be used as important reference of cultivar breeding and its contribution.