查询词典 random-mating population

The effects of mating experience and temperature on the production of the female black cutworm moth's sex pheromone were studied in this paper. The results indicated that the mating experience did not significantly affect the production of sex pheromone.

中文摘要：研究了交配和温度对小地老虎雌蛾性信息素产生的影响，结果表明，交配对性信息素各组分的滴度无显著影响，因此不影响小地老虎在下一暗期的再次求偶和交配。

The average thrusting duration was 20.9±0.5 seconds,and the average mating duration was 45.2±1.3 seconds.4 There was no copulatory lock during mating,and the male usually ejaculated following a single intromission after several thrusts.

平均抽动持续时间为20.9±0.5s，平均交配持续时间为45.2±1.3s.4东北虎在交配过程中无锁结现象，雄虎通常在一次爬跨多次抽动后即出现射精。

According to rigid motion theory and composition law of vectors, the relative position and orientation errors of mating surfaces of mating parts were computed.

基於刚体运动学原理，研究了装配工夹具的姿态偏差对零件配合面位置偏差的影响，推导了配合件和基础件相应配合面的位置和姿态偏差的计算公式，建立了机器人装配系统零件配合过程的误差分析模型。

It is generally considered a selfing species with a strong self-compatibility system, but a shift in mating system towards outcrossing or mix-mating has been reported.

通常认为它是自交种，但也有些研究报道它具有异交或者混合交配的繁育系统。

The author studied the changes in estradiol in female urine, mating behavior and factors influencing male mating investment in maske palm civet by using radioimmunoassay technique behavioral sampling techniques, and got the following results and conclusions

笔者使用同位素放射免疫分析方法研究了雌二醇在雌性果子狸繁殖中的变化过程、使用随机取样法和所有事件取样法研究了果子狸的交配行为和影响雄性果子狸交配投资的因素。得到以下结果和结论

Theeffective size of populations under maximum negative or positive assortive mating is larger thanrandom mating of selected parents.

同质和异质选配情况下，群体有效大小较选择的亲本随机交配要大，特别是异质选配。因此，采用异质选配，可以使选育与保种有机地结合起来。

One was the pqsA' positive expression plasmid constructed by cloning the pqsA'-lacZ fusion digested from pYHP441 into miniCTX-1, whose sequence was then integrated into wild type PAO-1 chromosome by biparental mating procedure. The other was pqsA-E operon knock-out plasmid whose sequence between pqsD and pqsE operon was inserted by tetracycline cassette by the site specific insertion mutagenesis strategy and the mutant constructed by biparental mating of S17-1 that harbored the plasmid and pqsA' positive expression mutant.

一种是酶切质粒pYHP441获得pqsA'-lacZ片段后，亚克隆入质粒miniCTX-1中，构建成PqsA'的阳性表达质粒，随后将构建的质粒，通过双亲交配过程整合入野生型铜绿假单胞菌株PAO-1染色体组中；另一种是通过点特异插入诱变策略，将四环素基因盒插入启动子pqsD和pqsE之间，构建的阴性质粒转化入大肠杆菌S17-1株后，和上述pqsA'阳性表达突变株进行双亲交配过程。

Sometimes a great many teeth or jaws are used, and they may be cut either circumferentially, so that they engage by cylindrical mating, or on the faces of the mating elements.

有时，一个伟大的许多牙齿或颌骨的使用，但他们很可能被削减要么环，让他们从事由圆筒形交配，或对所面临的交配元素。

Sometimes a great many teeth or jaws are used, and they may be cut either circumferentially, so that they engage by cylindrical mating, or on the faces of the mating elements.

他们可能在圆周面上加工齿，以便他们以圆柱周向配合来结合或者在配合元件的端面上加工齿来结合。

In tetrapolarity mating system,A and B factor is two mating types locus locating different chromosome,only when two single spore mycelium form AαAβBαBβ,then can produce to dikaryon and complete whole sexual life history.Study according to the Eger.

在四极性交配系统中，A和B因子分别对应位于不同染色体上的两个交配型位点，两个单核菌丝相遇，只有当它们形成A1A2B1B2或者AαAβBαBβ型时，才能产生具有锁状联合的双核体，完成整个有性生活史。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。