杂合性

Apomixis provides a unique opportunity to fix and utilize hybrid vigor. A number of research programs around the world have tried to use apomixis as an important plant-breeding tool.

无融合生殖是指不经过雌雄配子融合而产生种子的一种特殊生殖方式，能使基因型的杂合性得以保持，从而可以固定杂种优势，对作物育种具有极其重要的意义。

In addition,the satellitic numbers and satellitic heterozygosity of diploid species of Paeonia in China are briefly discussed.

此外，对国产芍药属二倍体种的随体数目及其杂合性等问题进行了初步讨论。

Objective To evaluate the loss of heterozygosity and microsatellite instability in the early diagnosis of bladder cancer.

目的 探讨染色体微卫星不稳定性及杂合性丢失在膀胱癌早期诊断中的意义。

AIM: To investigate genome-wide loss of heterozygosity and homozygous deletion in human pancreatic cancer cell lines.

目的：研究胰腺癌细胞基因组范围内的纯合性缺失和杂合性缺失(loss of heterozygosity， LOH)。

Chapter Four explains the importance of hybridity in relation to the characters\' identities.

第四章通过对杂合性和人物身份关系的讨论，进而分析沙林·西奈身份的杂糅性，并指出由沙林之子阿当所代表的"第三空间"。

Selfing heterozygotes halves the heterozygosity, and thus outbreeding maintains heterozygosity and produces a more adaptable population.

自交杂合子有一半杂合性，因此远系繁殖可以产生适应能量更强的种群。

So we considered that the number and morphology of NORcan not be used as identification markers of sex chromosome in Ginkgo biloba.

认为NOR的数目和形态不能作为性染色体的识别特征，并对NOR的杂合性和多态性进行了讨论。

2N gametes are the result of meiotic mutation during micro- and mega-sporogenesis that bear the sporophytic rather than the gametophytic chromosome number. This paper reviewed the genetic markers including the morphologic, cytological, isozymes and DNA markers, which have been employed in the generation, inheritance, heterozygosity and marker-assisted breeding of 2n gametes based on the frequency of large pollen grains, cytological analyses, unexpected occurrence of polyploidy progeny and the associations between parents and progenies.

文章综述了植物2n配子发生及其遗传标记研究现状，论述涉及有关形态学标记、细胞学标记、同工酶标记乃至DNA标记等遗传标记在2n配子研究中的应用，指出通过花粉形态观察、大小孢子母细胞减数分裂行为观察、杂种后代倍性鉴定以及亲子分子标记相关分析等，对2n配子发生、2n配子遗传类型与杂合性以及2n配子在育种实践中的有效性等进行研究。

Firstly, an invasive species must be invasive enough in itself or has some biological distinction, such as quantitative and qualitative differences in the genome, or patterns of recombination. Secondly, to invade successfully, a new environment for an invasive species must be invasible, and this we may call the ecological basis of invasion. An invasive species may need to establish new interactions with other species, especially those mutualistic relations such as animal related pollination, seed dispersal by animals, mycorrhizal fungi, and symbioses between plants and nitrogen fixing bacteria.

首先从其自身来说，需要有足够的入侵性，这可以认为是入侵种的生物学基础，可能表现为具有多倍性、一定的遗传变异、杂合性或表型可塑性，以及不同的交配系统等；其次一个物种的入侵成功还取决于入侵生境的可入侵性，这可以认为是入侵种的生态学基础，而新的种间关系的形成，尤其是入侵种与其他种类的互惠共生关系的建成是关键。

To isolate and clone the tumor suppressor gene on chromosomal region 7q32 that corelated with the occurrence of human NPC,we detected the genotype of polymorphic microsatellite markers on 7q32 in 24 nasopharyngeal carcinoma biopsies and matched normal lymphocyte DNA.

为了分离和克隆定位于7q32染色体区域的与鼻咽癌发病有关的抑瘤基因，检测了鼻咽癌活检组织及配对外周血标本中7q32微卫星DNA多态性位点的基因型，发现在7q32区域存在30%左右的杂合性丢失。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。