杂交

So,it isimpoortant to predict and evaluate the heterosis in theory and practice.

在肉牛生产中，杂交是获得最大产出率的手段之一，因而预测和评估杂种优势在理论和实践上均具有很大意义。

In China, Hunan is the first province to commercially exploit heterosis in rice.

中国湖南是大规模开发水稻杂交优势的第一个省份。

The results showed that there existed commonly the heterosis in crosses of pumpkin inbred lines.

结果表明，南瓜自交系的杂交后代普遍存在杂种优势。

The mating type gene is inherit decision factor of compatibility with the performance type,P.ostreatus belongs to sexual reproduction heterothallism,tetrapolarity,Namely the colony which is consist of single spore mycelium will self-sterility,If conjugate sex gene with all for incompatibility,then crossing can dicaryotization and form sporophore.

交配型基因是性亲和表现型遗传决定因子，平菇为有性生殖异宗配合四极性类型，即单孢形成的菌落自体不育，不同单核菌丝在配对基因皆为杂交结合时才能双核化，形成子实体。

The study suggest:(1) The observation of satellites in root tip and multiplex PCR makers could accurately identify the homozygous and the heterozygosis of 1BL/1RS translocation.(2) Through the restoring degree we could confirm the success of the transfer. The combination of the restoring degree and the agronomy property could increase the efficiency of practical application.(3) This study proposed the transformation from the physiological male sterile to the genetic male sterile, and then establish a method of utilize the strong superiority crosses.

其中复合引物PCR更适合于回交后代中大量目标种子的筛选；(2)恢复基因转育后代定株与不育系测交，依据测交恢复度可准确确定恢复基因在回交后代的延续，恢复基因定株定向转育与性状选择结合可大大提高转育后代的实际应用效果；(3)本研究提出的粘类小麦雄性不育恢复基因Rfv1定向转育体系，可有效地实现小麦由化控强优势组合向三系强优势组合的定向转化，即生理型不育途径向遗传型不育途径的定向转化，进而建拓一套杂交小麦强优势组合多途径利用新体系。

Prognostic significance of the loss of heterozygosity of nm23-H1 and p53 gene in human colorectal carcinomas.

Northern印迹杂交分析nm23基因在人肺癌中的表达研究。

The rate of loss of heterozygosity for nm23-H1 was 29.63%.

经Southern印迹杂交分析表明，36例大肠癌标本中27例为nm23-H1信息个体，其中8例存在杂合性缺失，缺失率29.63％。

The heterozygote genotypes in F2 population in this type of species are different from those in general species in which the genetic recombination occurs in meiosis of both male and female.

这类物种的杂交F2群体中杂合子基因型的与一般物种中雌雄个体的减数分裂细胞都发生遗传重纽的F2群体杂合子表型不同。

In common wheat ^hexaploid triticale, the exogenous genes are transferred by means of homoeologous chromosome pairing.

在以普通小麦为母本的杂交方式中，部分同源染色体配对可能是外源基因导入普通小麦基础。

From the F1 pollinated by transgenic hexaploid wheat.

F1与六倍体转基因小麦杂交。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！