种性状

It was obvious that the adaptability to lower temperature and critical low temperature are two relative independent character.

两种逆境对黄瓜生长的影响结果不同，黄瓜对两种逆境的耐受性是两个相对独立的遗传性状。

For different methods (moment solution and maximum likelihood estimation) and different models (homoscedastic and heteroscedastic models),more signifiant correlation was found between LOD scores than between the estimators of recombinant fraction ,Maximum likekihood method under homoscedastic model was then used to estimate recombinant fractions between quantitative trait lci controlling yield componments and 51 restriction fragment length polymorphism makers on 11 chromosomes of rice Oryza sativa L.

本研究根据对估计标记-数量性状基因座位之间重组率的两种分析方法、两种方差模型(QTL 基因型之间的方差同质和异质模型)的分析，揭示了LOD值在标记-QTL连锁检测上所得结果的相关性高于重组率估计值的相关性。

So the technology of introduction of exogenous DNA into tomato after pollination not only feasible within species but also feasible in over-distance hybridism and excellent gene can been transferred to the cultivate variety.

试验还选用野生种醋栗番茄作供体进行了远缘关系的分子杂交试验，以克服杨晓锋：对外源DNA导入番茄的研究远缘杂交不亲和性，将野生种抗病性强的优良性状转移到受体中来，重组优良基因培育新品种材料也获得了较为满意的效果。

Many kinds of genetic resources of fine characteristic are filtered by studying, and provides fine idioplasm which can be used for breeding and studying genetic resources.

笔者主要对西藏春青稞种质资源中优异种质进行评述，筛选出一批具有一种或一种以上的优良性状的遗传资源，并提供可利用的优良种质，为青稞育种及基因资源的研究提供依据。

It is concluded that the quality could be improved in some interspecific hybrid.

认为，种间杂种的品质性状在一些组合中比普通小麦有所提高。

In order to reduce calculation error, the frequency distribution of average values is used to compute the mixed distribution's digital features of each component distribution, thereinto, the number of the component distribution is determined by AIC, choose the number that meets the minimum value of AIC as the component number of mixed distribution, and the other parameters are estimated by EM algorithm; Secondly, because each component distribution is corresponding to a kind of major gene genotype, according to the values of the average and variance of the each component distribution, we can use the limit error of the normal distribution to plot each individual into the correspondent component distribution, namely into correspondent major gene genotype. Then we regard each major gene genotype as a treatment level of one-way analysis of variances, and the one-way multivariate analysis of variance is carried out to calculate the covariance matrix of major gene effect, covariance matrix of polygene effect, covariance matrix of environment effect and so on; At last, combining the weights of the each component distribution of mixed distribution, we can calculate the variance of major gene effect, the variance of polygene effect, environmental variance and the genetic gain of the quantitative trait.

为减小计算误差，本研究采用均值的频数分布来计算各成分分布的数字特征，其中成分分布个数根据AIC准则，选择使AIC值达到最小的成分分布个数作为混合分布的成分分布数，分布中其它参数的确定利用EM算法来估计；其次，每个成分分布对应一种主基因基因型，根据各个成分分布的均值和方差，利用正态分布的极限误差将每个个体划分到相应的成分分布中，即相应的主基因基因型中，将每种主基因型作为单因素方差分析的一个处理水平，对其进行单因素的多元方差分析，分别计算主基因效应协方差阵、多基因效应协方差阵、环境协方差阵等参数；最后结合混合分布中各成分分布的权重即各主基因基因型的分离比例，计算主基因效应方差，多基因效应方差和环境方差，以及遗传力等参数，进而计算该数量性状的遗传进展。

They are often morphologically distinct from A chromosomes, being smallerand more highly heterochromatic in most cases. B chromosomes do not pair with Achromosomes, and they are inherited in a non-Mendelian way, exhibiting meiotic andmitotic instability and nondisjunction. However, B chromosome DNA is quiteidentical to the corresponding sequence on the A chromosome complement. So far afew B chromosome specific DNA sequence have been identified. Specific DNAsequences on B chromosome have been the attractive research area on Bchromosomes.

现已在千余种植物和近三百种动物中被发现。B染色体与物种中正常染色体不同：独立于整倍体基因组之外，减数分裂时不与A染色体发生联会和配对，细胞分裂后期不分离，非孟德尔遗传，富含异染色质，不含对宿主主要性状有影响的基因等。B染色体DNA的分子组成既与A染色体极为相似，具有A染色体DNA分子组成的一般特征：富含重复序列和转座成分，染色体三大功能组件DNA高度同源；又与之相区别，含有B染色体特异的DNA序列，这些DNA序列可以为探讨B染色体的起源和进化提供有价值的信息。

There is one kind of adjectives in modern Chinese which can express the meaning vividly and is full of the sense of visual. These adjectives describe properties of things concretely in the forms of reduplication. They are the means of expressing vivid characteristics of Chinese and represent the unique trait of Chinese characters.

现代汉语中，有一类表意生动而富有形象感的形容词，它们以叠音形式对事物的性状进行具体的描摹，是表现汉语形象色彩的一种手段，成为词汇的一种民族特色，而ABB式形容词就是其中的典型代表。

Advances in studies on formation and inheritance of seed capsule color,and molecular marker and breeding for yellow seed capsule in rapeseed were reviewed.

综述了油菜种皮颜色的形成、种皮色泽的遗传、黄籽性状的分子标记和黄籽甘蓝型油菜选育等方面的研究进展。

Using a tree diagram and calculations, he indicates the "divergence of character" from original species into new species and genera.

利用树形图和计算，他展示了"性状的分歧"从原始种进入新的种或属。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。