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我们于1986—1987年对15个二棱啤酒大麦的株高(x_1)、单株穗数(x_2)、平均穗长(x_3)、单株粒数(x_4)、千粒重(x_5)、结实率(x_6)和单株产量(y)之间进行了多元回归分析。结果如下:(1)x_4和x_5对y的贡献达极显著水平,它们和y间的直线回归方程为y=-1.972059+0.03661108x_4+0.05663436x_5(F=29.95457~(**),R=0.912756)。根据这一方程可对二棱啤酒大麦的单株产量进行预报;(2)六个农艺性状对单株产量贡献大小的顺序为:单株粒数>千粒重>单株穗数>株高>平均穗长>结实率,因此,在二棱啤酒大麦的育种实践中,应把提高单株粒数作为主要育种目标,千粒重次之。
In 1986-1987, we measured the plant height (x_1), panicle number (x_2), average panicle length (x_3), grain number per plant (x_4), grain weight per plant (x_5), seed setting rate (x_6) and yield per plant (y) by multiple regression analysis. The results are as follows: (1) The contribution of x_4 and x_5 to y is extremely significant. The linear regression equation between them and y is y = -1.972059 + 0.03661108x_4 + 0.05663436x_5 (F = 29.95457 **, R = 0.912756 ). According to this equation, the yield of two-row beer barley can be predicted. (2) The order of contribution of six agronomic traits to single-crop yield is as follows: grain number per plant> 1000-grain weight> panicle number per plant> Spike length> seed setting rate, therefore, in the practice of two-row beer barley breeding, we should increase the number of grains per plant as the main breeding target, followed by 1000 grain weight.