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無籽西瓜是轉基因嗎，無籽西瓜的培育過程

來源:鮮淘網 2019-04-16 15:00:59      水果之家果果 手機版

　　西瓜有籽正常，西瓜無籽則會讓人產生疑惑，轉基因食品越來越多，很多人也開始關注夏果之王“無籽西瓜”，西瓜在夏季是人們的最愛，談及轉基因很多人都會惶恐不安。無籽西瓜是轉基因嗎，無籽西瓜的培育過程又是怎么樣的呢，接下來果果將給大家普及一下相關知識!

　　無籽西瓜是轉基因嗎

無籽西瓜是轉基因嗎，無籽西瓜的培育過程

　　無籽西瓜不是轉基因水果，轉基因水果要采用生物技術，將某種生物基因轉移至其它物種上，讓生物的遺傳物質發生改變，使產品的營養和品質得到提升。無籽西瓜是自然的同種產品雜交出來的，沒有進行基因轉移。自然也不是轉基因水果。不過它的染色體發生了改變，而沒有了繁殖能力，形成了無籽西瓜。

　　無籽西瓜的培育過程

無籽西瓜是轉基因嗎，無籽西瓜的培育過程

　　無籽西瓜是雜交品種，它的培育過程很是復雜，專業上來說，它是由四倍體西瓜和二倍體西瓜雜交而成，人稱三倍體西瓜，它的染色體呈現為奇數，所以不具備繁殖性。在植物學里，講究染色體呈現對數關系，一般都呈現為雙數，人稱二倍體植物，它們具有繁殖有力。而染色體成雙成對才能結籽。單數染色體則不具備繁殖能力。具體培育過程如下：

　　1、人工誘導多倍體西瓜

無籽西瓜是轉基因嗎，無籽西瓜的培育過程

　　　無籽西瓜的培育過程首先是采用人工誘導多倍體的方法，培育出四倍體西瓜，可利用秋水仙堿溶液滴西瓜幼苗，讓二倍體西瓜的染色體成倍增長，通常可以令22條染色體變成44條染色體。44條染色體的西瓜稱之為四倍體西瓜。

　　2、四倍體西瓜+二倍體西瓜雜交

無籽西瓜是轉基因嗎，無籽西瓜的培育過程

　　以四倍體西瓜為母體，二倍體西瓜為父本，它兩相雜交后，染色體的數量放生了轉變，染色體變成了33條，同源染色體聯會紊亂無法形成正常配子，沒有了繁殖能力，更不能受精，所以形成了子房膨大發育，無籽西瓜與母本和父本染色體都不相同，故而變成了無籽西瓜。

　　結語：無籽西瓜不是轉基因水果，它是四倍體西瓜和二倍體西瓜的后代，學術界稱三倍體西瓜，它沒有繁殖結籽的能量，自然成了無籽西瓜，無籽西瓜吃起來更方便，口感也很好，大家可以放心吃。

　　相關推薦：

　　拇指西瓜是幾月種植的，拇指西瓜種子哪有買

　　西瓜雪糕的做法，西瓜雪糕怎么做好吃

　　拇指西瓜怎么吃，拇指西瓜什么味道

 

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