西藏地区不同年代春青稞品种的灰色关联度评价

通过应用灰色关联度分析方法，首先计算了西藏地区不同年代13个参试春青稞品种8个农艺性状与产量性状的关联度，并在此基础上进一步计算了参试品种与理想品种的等权与加权关联度。农艺性状与产量性状的关联度按大小排序为小穗数〉株高〉穗粒数〉穗长〉生育期〉千粒重〉单位面积穗数〉退化小穗数。参试品种与理想品种的等权关联度按大小排序为90（12）-4〉94（08）-1〉藏青148〉藏青690〉藏青85〉喜玛雅19〉白青稞〉QB-1〉品比15〉98042〉藏青3179〉山南60天〉97139，加权关联度按大小排序为94（08）-l〉藏青148〉90（12）-4〉藏青690〉QB～1〉白青稞〉藏青85〉品比15〉藏青3179〉喜玛雅19〉97139〉山南60天〉98042。根据两种关联度的大小，分别于1990、1994年与1992年育成的品种90（12）-4、94（08）-1与藏青148表现居于前3甲。加权关联度显示的评价结果比等权关联度更接近参试品种的田间表现。培育大穗与秸秆较高品种，提高单穗小穗数、穗粒数可能成为今后西藏地区春青稞育种与栽培管理工作的主攻方向。表7，参13．

Grey Correlative Degree Evaluation of the Spang Barley Varieties Cultivated in Different Years in Tibet

By means of the method of the gray correlative analysis,the degree between agronomy properties and yields of 13 spring barley varieties in this research were calculated at first, and then the degree among each of the 13 varieties and the variety assumed perfect were calculated. It showed that the degree value between spikelet number per spike and yield appears to be the biggest one, and then in turn, height, and grain number per spike, spike length, and growth period, weight per 1000 grains, and spike number per hm2, invalid spikelet number per spike. When all agronomy properties assumed to be with unequal impertance to the variety, according to the degree value, the variety named as 94（08） - 1 appears to be the best one, and in trun, Zangqing148,90（12） - 4, and Zangqing690, QB - 1, and White barley, Zangqing85, and Pinbil5, Zangqing3179, and Ximayal9,97139, and Sharman - 60 - days, 98042. The varieties of 90（12） - 4,94（08） - I and Zangqing148 are the best in 1990, 1994 and 1992, respectively. As a result, breeding for spring barley varieties with bigger spike and higher stalk and increased spikelet and grain number per spike will be the main goals for us in the future.