作物区试中的品种合理评估问题  

RATIONAL EVALUATION OF THE CULTIVAR IN CULTIVAR REGIONAI TEST

作　　者：俞世蓉[1] 徐勇[1] 

机构地区：[1]南京农业大学农学系,210014

出　　处：《南京农业大学学报》1992年第4期12-18,共7页Journal of Nanjing Agricultural University

摘　　要：以江苏省小麦品种区试资料为例,探讨对品种的合理评估问题。(1)优度估计。对品种×环境资料算出的品种总优势度,定义为通过全部试点中平均的品种响应值与最大响应值间的距离均方。其中的对照仅视为一个在某一试点中有可能是最大响应值的一个品种,而不须作为对参试品种评价的标准。这可容许育种者选设地区适应的品种作为对照时以较大的灵活性。(2)参数分组佔计。试点按产量水平及其变异度分为几个组,分组评定各品种的稳定性。这样的分析,可以给予各参试品种以更合理的评价。A set of wheat eultivar regional test data in Jiangsu Province was used as an example todemonstrat the analysis method.(1)A measure of cultivar general superiority for cultivar×environmentdata is defined as the distance mean square between the cultivar's response and the maximum response aver-aged over all locations.This allows a greater flexibility for a breeder to choose locally adaped cultivars aschecks.(2)Stability was analyzed using data from 1980 to 1989 for 13 test sites in Jiangsu Province.Testsites were divided into four groups according to the yield level and variability of the test site for assessing sta-bility.The response of the five wheat cultivars was different for the four groups of test sites.Ningfen wheatwas most stable at the high-yield and low-variability sites and Yangmai 5(Yangzhou Wheat No.5)was sta-ble and widely adapted at the four groups.

关 键 词：品种 区种域试验 品种评估 作物 

分 类 号：S338[农业科学—作物遗传育种]