选育作物新品种时,了解杂种第二代不同性状间的表现型相关和基因型相关是很有必要的,因为它可以指导我们的育种工作。但是由于表现型相关包括了环境条件的影响,可靠性较小,而基因型相关去掉了环境条件的影响,可靠性较大,所以根据基因型相关进行选择就 When breeding new varieties of crops, it is necessary to understand the phenotypic and genotype correlations between different traits of the second generation of hybrids because it can guide our breeding efforts. However, since the phenotypic correlations include the influence of environmental conditions, the reliability is low, and the genotype-related correlations remove the influence of environmental conditions and are more reliable. Therefore, selection based on genotype correlations