甜瓜T912雌花形成时雄蕊原基退化的形态学观察

The Morphologic Observation of Retrogressive of Stamen Primordium as the Formation of Female Flower in T912(Cucumis melo L.)

甜瓜T912品种是雌雄异花同株,与正常品种的雄全同株不同,这在育种工作中省去了人工去雄的麻烦,大大提高了杂交的成功率和种子纯度。本文通过对T912品种雌花形成时雄蕊原基退化的形态学观察,并与正常的完全花品种1 4进行比较,认为雌花是完全花发育过程中雄蕊退化的结果,退化的雄蕊原基中无花药组织的分化。另外,用计数法对T912与1 4两个品种进行了统计,结果发现T912雄蕊原基以5数居多,与正常的1 4雄蕊以3数为主有所区别。

Different from the normal andromonoecy, T912 (Cucumis melo L.)is the dicling and androgynism, which has saved a lot of trouble in artificial emasculation and greatly improved the rate of successful cross and the purity of seeds. Through the morphologic observation of retrogressive of stamen primordium as the formation of the female flower in T912 (Cucumis melo L.), and comparison with the normal monoclinic 1-4(Cucumis melo L.), in this paper conclusions have been drawn: the formation of female flower is the result of stamen retrogressive during the development of monoclinic; in the stamen primordium of retrogressive, the differentiation of anther tissue hasn't been observed. In addition, counting method was used to count up T912 (Cucumis melo L.) and 1-4(Cucumis melo L.). The result shows that the number of stamina primordia is 5 in the most of flowers of T912 (Cucumis melo L.), different from that of the normal stamina -3 in the most of flowers of 1-4(Cucumis melo L.).