早熟性是小麦育种目标中考虑的主要特性之一。了解杂种第二代抽穗期的遗传特点,是育种工作中的主要问题。本试验研究了十几个组合的材料,每个组合的杂种群体调查200株左右,亲本调查20—30株左右,为了表达方便,本文把所调查的抽穗日期直接作为一个数量指标来处理。 一、杂种第二代抽穗期 的分离幅度 小麦杂种F_2抽穗期幅度大。本试验有 Prematureness is one of the main characteristics considered in the breeding goal of wheat. Understanding the genetic characteristics of the hybrid second-generation heading date is a major issue in breeding work. In this study, more than a dozen combinations of materials were surveyed. About 200 hybrid populations were surveyed in each group, and about 20-30 parents were surveyed. In order to facilitate expression, the date of heading date under investigation was directly used as a quantitative index. First, the separation of hybrid second-generation heading stage Wheat hybrid F 2 heading stage amplitude. This test has