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杂种优势的

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Since microspore mother cells showabortion during the first meiotic divison,it is suggested thatthe early male abortion is frequently associated with variousdegrees of impairment to the fertility to the female〓amate.

研究的27个杂种第一代中,有11个组合的产量超过对照或与对照持平,占总组合数的40.74%。在强优势组合中,不育细胞质带来的负效应不足以使F1产量的显著降低,而且通过杂优补偿作用可比对照有所提高。

The results showed that there was a linear regression between F1 heterosis and the genetic differential index of its parents.

结果表明,杂种一代某些性状的优势率与其双亲间的遗传分化指数存在极显著的直线回归关系。

2N-6x-42are succeeded.Chinese Spring has very small ear,awnless,very narrow leaf blade;but hybrid has very big ear, short awn and filled grain,and leaf blade are very wide like Avena fatua L.

中国春穗较小,无芒,叶片较窄,而中国春与光稃野燕麦的杂种稳形较大,有短芒,籽粒饱满,且叶片宽大近似于野燕麦,表现优势很强。

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推荐网络例句

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

The shamrock is the symbol of Ireland and of St.

三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。