克服棉属种间杂交不亲和性的研究

Study on Surmounting Incompatibility of Fo of G. hirsutum×G. arboreum

陆地棉（Ｇ．ｈｉｒｓｕｔｕｍＬ．２ｎ＝５２）与亚洲棉（Ｇ．ａｒｂｏｒｅｕｍＬ．２ｎ＝２６）杂交，由于种间隔离，遗传机制差异较大，不易结实，我们多年研究结果表明，棉属（Ｇｏｓｓｙｐｉｕｍ）种间杂交由于选配的亲本不同Ｆ０代的成胚频率差异很大，选择植株呼吸强度大，叶绿素ａ含量高和主要经济性状如单铃重、单铃种子数、子指等一般配全力较高的棉种作亲本，可以显著提高杂交当代的成胚率。

When G. hirsutum L.(2n=52)was crossed with G. arboreum L.(2n= 26), itwas hard to get seeds because of significant differences in genetic and physiological mecha-nism between different specieses. Researches made in many years showed the rate of em-bryo formation for Fo was largely depedent on the parents selected in interspecific hy-bridization. Therefore, combined with in vitro culture of young embryo at the same time.it could significantly increase embryo forming percentage of Fo to select parents withstronger respiratory intensity and rich chlorophyll a content as well as high general com-bining ability in main economic characters such as single boll weight, seed number of sin-gle boll and seed index.