论文部分内容阅读
无籽西瓜,果实内没有成熟的种子,只有少量白嫩空秕种皮,食用方便,更因它味甜多汁,深受人们的欢迎。但是在发展无籽西瓜生产中,如何确定已选育成功的优良四倍体是常遇到的问题,这里介绍两种简易的方法: 一、苗期子叶外形鉴定法子叶是植物体的稳定特征之一。四倍体瓜苗的子叶,纵、横径几乎等长,近圆形,叶脉很粗,子叶肥厚,叶的边沿下卷,上面向上凸起,形状像一个扣着的汤勺。二倍体瓜苗,子叶的纵径大于横径,呈长椭圆或椭圆形,叶脉细,子叶薄,叶面平展或微向上卷。此法比较简便,但可靠性差些。
Seedless watermelon, there is no mature seeds in the fruit, only a small amount of white and blank mulched bark, easy to eat, but also because of its sweet and juicy, welcomed by people. However, in the development of seedless watermelon production, how to determine the successful selection of tetraploid success is often encountered in the problem, here are two simple methods: First, seedling appearance of cotyledon Cotyledon is a plant’s stable characteristics one. Tetraploid melon seedlings cotyledons, vertical and horizontal diameter is almost the same length, nearly round, thick veins, cotyledons hypertrophy, the edge of the leaf roll down, the above raised up, shaped like a buttoned soup spoon. Diploid melon seedlings, cotyledons longer than the diameter of the vertical diameter, elongated oval or oval, thin veins, thin cotyledons, foliar flat or slightly to the volume. This method is relatively simple, but less reliable.