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生产中使用的棉种绝大部分是四倍体陆地棉种。如何进一步扩大其遗传基础,把诸如早熟、抗逆性强等更多更好的优良性状综合到栽培品种中去是一个很重要的问题,解决这一问题的途征之一就是种间杂交。但是种间杂交除栽培的陆地棉和海岛棉较易成功外,一般种间杂交成功的可能性很低。主要表现为亲本的不亲合性和杂种后代的不育性。过去在田问条件下所做的大量研究主要问题是结铃率很低,能获得的种子和杂种植株的频率都非常低。近年根据胚胎学研究的进展,已经能够观察到种间杂种中胚和胎乳发育上的不协调异常现象。当陆地棉×亚洲棉时,亚洲棉花粉能够在陆地棉柱头上正常
The vast majority of cotton varieties used in production are tetraploid upland cotton species. How to further expand its genetic basis, such as early maturity, strong resistance and many more good traits integrated into cultivars is a very important issue, one way to solve this problem is interspecific hybridization. However, interspecific crossbreeding is more likely to succeed in crossbreeding in general than in cultivated G. hirsutum and G. barbadense. Mainly manifested as the parental incompatibility and hybrid offspring infertility. The main problem that has been extensively studied in the past under the field conditions was that the boll rate was low and the frequency of available seeds and hybrid plants was very low. In recent years, according to the progress of embryology research, we have been able to observe the mismatch anomalies in interspecific hybrid embryo and fetus development. Asiatic cotton pollen can be normal on upland cotton stigmas when they are up to cotton x Asian cotton