查询词典 mutation

But now a group at University College London has shown that the mutation actually appeared about 7,500 years ago in dairy farmers who lived in a region between the central Balkans and central Europe, in what was known as the Funnel Beaker culture.

过去十年内，有很多研究围绕这些成年后保留喝牛奶能力的人群基因展开。长期以来的理论是：该突变基因首先出现在北欧，那里的人们从光照中吸收的维生素D少，因此从牛奶中吸收的关键激素就多。

But now a group at University College London has shown that the mutation actually appeared about 7,500 years ago in dairy farmers who lived in a region between the central Balkans and central Europe, in what was known as the Funnel Beaker culture.

研究人员对欧洲地区的乳糖耐受性的传播、乳品业、其它食品聚集过程和基因进行了计算机建模。

The blood relationship tree and evolution position of Tibet mini-pig were established. Result There were 14 mutation sites between domestic pigs in China and pigs from Europe. Besides there was a significant difference in two nucleotide site: a T→C switch in site 420 and the G→A switch in site 883 at the same time.

结果 西藏小型猪等国内部分品种猪的Cyt b基因序列与欧洲猪相比有14个变异位点；但是西藏小型猪与国内品种猪相比存在两个特殊碱基位点即在420位点T→C转换的同时在883位点存在G→A转换。

At present,most new litchi and longan varieties are selected from seedlings or bud mutation.

目前，荔枝和龙眼的品种选育仍然以实生选种和芽变选种为主。

HCV particles are formed by "bud mutation" of HCV in the cytoplasmic vesicles of B-lymphocytes.

病毒在感染细胞胞质空泡部位合成和组装，以芽生方式进入胞质空泡内形成病毒颗粒。

The main breeding methods of triploid grape such as crossing between diploid and tetraploid cultivars, endosperm culture, using 2n gametes and bud mutation etc.

探讨了三倍体葡萄育种的主要途径如利用二倍体和四倍体杂交、胚乳培养、利用2n配子和芽变选择等。

The 180bp amplification fragment was present in Wellspur Delicious, not in starking from which the former mutated, suggesting that retrotransposon activity might be involved in the bud mutation of Wellspur Delicious.

此外，在红星的芽变品种矮威尔中检测到了一条约180bp的特异带，表明该品种的芽变与逆转座子的插入突变可能有一定关系。

Anthocyanin content and activities of related enzymeswere measured in'Ralls'and its budmutation. Effect of bagging on anthocyanin biosynthesis in bud mutation was also studied.

以'国光'苹果及其红色芽变为试材，测定了果实发育期间的花青苷含量及其相关酶活性，并研究了套袋对芽变花青苷合成的影响。

Lintao-1, a new extra early peach cultivar, is a bud mutation of Beijing-2 peach cultivar.

临桃一号由北京二号芽变选育而来，是一个集极早熟与优质于一体的鲜食桃新品种。

Results Positive HCV RNA was found in supernatants of B cell line. HCV Ag and HCV RNA were also showed positive. Electron microscopy observed HCV spherical virus like particles with a diameter of approximately 65 nm and 110nm and the "bud mutation"of HCV in the cytoplasmic vesicles of B lymphocytes.

结果细胞系上清液中HCV RNA呈阳性，细胞内HCV抗原及HCV RNA均呈阳性，电镜观察结果发现细胞内存在65nm和110nm圆球型病毒颗粒，并可见病毒芽生形成现象。

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。