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无籽西瓜

无籽西瓜

无籽西瓜,通常指经过人工处理后生产的三倍体西瓜。

原理

一般的西瓜二倍体植物(即每个细胞内有2套染色体)。用秋水仙素处理萌发的普通西瓜幼苗,使染色体加倍,植株成为四倍体。将四倍体作为母本,与父本二倍体西瓜杂交后,产生三倍体种子。再种下三倍体西瓜的种子,由于染色体数为奇数,无法进行联会,所以植株无法产生花粉,需要一般西瓜的为其授粉。最后结出的果实是三倍体果实,即无籽西瓜[1]。跟一般西瓜的种子比起来,无籽西瓜中的种子小且不明显。这种西瓜无法通过种子繁殖。

参考资料

  1. ^ 无籽西瓜和有籽西瓜是一样的吗. 中国农业网. 2010-12-02 [2012-12-09]. (原始内容存档于2019-08-30) (中文(中国大陆)). 
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无籽西瓜
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