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由于亲本在亲缘上的远近,受精选择性的不同,以及外界特殊条件刺激而引起生理突变等原因,棉花各种杂交方法及人工引变所产生的后代,其变异是多种多样的,但仍呈一定的规律性.在育种上如何掌握变异趋势、为选择亲本、搭配组合而育成具有综合优良性状的新品种提供依据,是杂交育种工作中首先需要解决的问题.从1958年起,我们在物学差异(品种间、种间及远缘杂交)、受精选择性(多父本、野生植物蒙导、限量授粉)、外界条件刺激(短日照、X射线处理)等三方面试图摸索一些规律.现将几年来看到的一些现象提出来、供有
Variation is diverse due to the variety of hybridization methods and artificial changes caused by the parents due to the relative distance between the parents, the different fertilization selectivity, and the physiological mutation caused by the special conditions of the outside world. Showing a certain regularity.How to grasp the trend of variation in breeding, to provide the basis for selection of parents, combination and breeding of new varieties with comprehensive fine traits is the first problem to be solved in hybrid breeding.From 1958, we are in Three kinds of laws have been explored in the following three aspects: physical differences (inter-species, interspecific and distant hybridization), fertilization selectivity (polygamy, wild plant guide, limited pollination), external stimuli Now we have come up with some of the phenomena we have seen in recent years