在小麦育种实践中,一般是通过对杂种后代的表现型结合既定的育种目标,进行选择,这在相当程度上带有一定的盲目性。随着数量遗传科学研究的深入发展,为提高小麦亲本选配和杂种后代选择的予见性提供了科学依据。一九八一年以来,对春性小麦十二个主要数量性状的遗传力h~2(％)、遗传变异系数G、C、V与予期遗传进度△G、△G′等遗传特性进行研究。根据有关性状遗传的参数提出我区春性小麦育种应该抓好“两个基本环节”和杂种低代掌握“五大性状要素” In wheat breeding practice, the selection is usually made by combining the phenotypes of the hybrid offspring with the established breeding objectives, which to a certain extent has certain blindness. With the in-depth development of quantitative genetic science research, it provides a scientific basis for improving the preferential nature of wheat parental selection and hybrid offspring selection. Since 1981, the inheritance of genetic traits h ~ 2 (%), genetic variation coefficient G, C, V and the expected genetic progress △ G, △ G ’were studied in twelve major quantitative traits of spring wheat . According to the genetic parameters of traits suggested that spring wheat breeding in our district should focus on “two basic aspects” and hybrids to master the “five traits elements”