杂种

The female gametes with 21 chromosomes intended to be with stronger competitive ability for pollination. Successful backcross didn't depend on the unreduced female gametes from restitution division.

同时也证明，回交的成功并不取决于杂种F1通过重建分裂形成的未减数雌配子。

Thus it is obvious that the weak homology existedamong genomes A, B, D and 〓. However, the rare unreduced gemetes and near-unreduced ones with the loss of several chromosomes could be produced by the highlyunequtional division of univalents at the first meisis and the normal second division,which gave the F1 hybrid the partial fertility.

但通过第一次减数分裂时单价体的极不对称的分离及正常的第二次分裂，可形成少量未减数配子和丢失了少数几条染色体的近未减数配子，使杂种〓表现部分可育性。

Meanwhile, by either artificial chromosome doubling via colchicine treatment or spontaneous chromosome doubling via a union of unreduced gametes (2n) from T. turgidum-Ae.

同时，通过秋水仙碱对四倍体小麦-节节麦杂种进行染色体人工加倍或利用未减数配子自然加倍，我国科学家创制了一些新的人工合成小麦。

A number of polar bear hybrids are described as Ursid hybrids, a term that designates any hybrid of two species within the Ursidae family.

很多北极熊与其它熊的混血儿被称之为&杂种熊科动物&，这一术语指的是熊类家族中任何两种成员的杂交后代。

But theimprovement was still needed because of its late maturity and low grain-weight. The NChybrid is crossing with other vulgare so as to breed new NC hybrid suitable forproduction.

但在千粒重和早熟性上还有欠缺，目前正用其它普通小麦品种进行转育，以期培育出生产上能用的核质杂种小麦。

Maize (Zea mays L.) is one of the most important crops because of the remarkable properties of its hybrid, which is responsible for the high commercial value of hybrid maize.

杂种优势在提高粮食作物特别是玉米的产量方面具有重要的作用。

On the basis of protoplast culture, we performed protoplast fusion between Astragalus melilotoides Pall, and Zygophyllum xanthoxylum Maxim using a modified PEG high-pH, high-Ca2 method. The protoplasts of A. melilotoides were pretreated with Rhodamine-6G and those of Z.

在成功培养原生质体的基础上，用改进的PEG-高pH高钙法诱导草木樨状黄芪和木本霸王原生质体融合，得到了科间体细胞杂种融合细胞。

Individuals crossing exclusively within the same population produce more progeny than those crossing in both directions and thereby use up some of their gametes for the production of inviable hybrids.

完全在同一种群内进行杂交的个体比以两个方向进行杂交的个体繁殖后代要多，因此为了产生无生机的杂种，就要消耗掉一些配子。

The distributions of protein content in F2 population indicated that protein content were controlled by major genes and polygenes. At the same time, It also were influenced by the environment and the cytoplasmic effect.

各杂种F2群体的子粒蛋白质含量分布图表明大麦子粒蛋白质含量属数量性状，由主效基因和若干微效基因共同控制，同时还受到环境和细胞质效应的影响。

Rice cytoplasmic male sterility is female parent genetic phenomenon, which is the main means to utlize filial superiority.

水稻细胞质雄性不育是一种母性遗传性状，它是水稻杂种优势利用的一个重要途径。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。