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胞质雄性不育系(简称不育系)是向日葵杂交种的母本,是杂种优势利用研究的重要组成部分。要选育出高产高油的优良杂交种,必须首先选育出理想的不育系和恢复系。众所周知,作物育种工作,是一项既复杂而周期又长的工作,并受气候、环境和作物本身等多种因素的影响,所以短期内难以取得卓有成效的育种效果。因此,在育种方法上,要根据作物遗传规律进行创造和探索,不断学习和运用先进经验。不育系选育主要包括两方面工作:1.回交转育工作利用保持型材料,对稳定性不育源进行连续回交转育,经过6～7代即可转育成不育系,而保持型材料成为同型保持系。这种直接回交转育工作比较容易进行。当然,在转育过程中要不断进行选择。
Cytoplasmic male sterile lines (referred to as sterile lines) are the female parent of sunflower hybrids and are an important part of heterosis utilization. To breed good hybrids with high yield and high oil, we must first breed the ideal CMS line and restorer line. As we all know, crop breeding is a complex and long-term task that is affected by many factors, such as climate, environment and crop itself. Therefore, it is difficult to achieve fruitful breeding results in the short term. Therefore, in breeding methods, we should create and explore according to the laws of crop genetic resources, and constantly learn and apply advanced experiences. CMS breeding mainly includes two aspects: 1. Backcrossing use of maintenance-oriented materials, the stability of infertility source by continuous backcrossing, after 6 to 7 generations can be transferred into sterile lines, and Maintenance-type material to become the same type of retention system. This direct backcross breeding work easier. Of course, in the transfer process should continue to choose.