Inbreeding depression

The genetic basis of inbreeding depression cannot be explained by means of simple model .

近交衰退的遗传基础，不能以简单的模式来说明。

Inbreeding depression is common in the world , but its mechanism is not clear .

近交衰退是生物界普遍现象，但其机理不清。

There were significant differences in inbreeding depression between the families or mating parents .

结果也显示，在不同个体之间近交衰退程度存在明显差异。

Inbreeding depression may result .

可能引起近宗繁殖缺陷的产生。

When considering inbreeding depression , the population genetic diversity will be reduced and the extinction probability will be increased .

在考虑近交衰退的影响后，遗传多样性水平降低，灭绝率提高；

Inbreeding depression in yield was obvious , while that of pods / plant and seeds / plant not too large .

产量的自交衰退明显，而荚/株、粒/株衰退幅度较小。

Reduced vigor or " inbreeding depression " is not an invariable consequence of inbreeding .

降低生活力或近亲繁殖的衰退并不是近亲繁殖必然的后果。

Compared with other ways of population improvement , Mass selection can not only preserve genetic variance within populations , but also prevent from inbreeding depression .

在群体改良方案中，混合选择法既可以保持群体内的遗传变异，又可以防止近交衰退。

Detail analysis suggests that the inbreeding depression might occur during the period of seeding and adult stage or of flowering and seed filled stage .

分析表明近交衰退发生在幼苗至成熟之间，也可能在开花与结实期。

The results show that the correlation coefficient was too low to infer the relative level of PRPG from the degree of inbreeding depression . 4 .

结果表明由于相关系数较低，不能以家系近交衰退的程度推断其背景回复率的相对高低。

The production of weak offspring as a result of selfing , inbreeding depression , may be hard to distinguish from late-acting SI systems .

因为自交产生的后代较差（自交衰退），因而很难与后作用SI系统区分开来。

The use of Chinese cultivars offers a new strategy for persimmon breeding by overcoming inbreeding depression , and has the potential for progressing the breeding of new PCNA cultivars .

利用中国原产PCNA品种可克服近交衰退，并为柿育种提供新的策略，具有推动加速培育新PCNA品种的潜力。

The high intrapopulation variation and low interpopulation differentiation could explained that the different populations might originate from the same one and genetic drift or inbreeding depression had not influenced primary process of genetic diversity .

四合木种群较高的遗传多样性和极低的种群间分化，说明不同的种群可能有共同的起源，随机遗传漂变和近交衰退不是影响遗传多样性的主要过程。

This suggests that , in future theoretical and experimental studies , there is the potential need for measuring these values ( migration rate , within-deme inbreeding depression , genetic load etc. ) in demes of different ages .

这意味着：我们在以后的理论和实验研究中，度量这些值（集合种群的迁移率、近交衰退和遗传负荷等）要分年龄进行。

The average heterosis of F2 over mid - parent based on population mean was - 1.99 % to 1.11 % for all these traits . It suggests that little inbreeding depression exists for F2 and F3 seeds .

按群体平均数计算，这些性状F2的中亲优势仅为－1.99%～1.11%，这揭示出F2、F3近交衰退很少。

Pollen discounting reduces a selfers ' success as an outcross pollen parent , i.e. lowering automatic selection advantage , and inbreeding depression is expected to reduce any advantage selfers might gain through reproductive assurance or automatic selection .

花粉贴现降低了自交植物通过异交花粉途径获得的适合度，即减弱了自动选择优势，而近交衰退既减少了自动选择优势也减少了繁殖保障给自交者带来的利益。

Unfortunately , most of the population are declining with several species even to threatened or endangered due to habitat loss and environment pollution . When considering inbreeding depression , the population genetic diversity will be reduced and the extinction probability will be increased .

然而因栖息地的丢失和污染，资源破坏严重，有的种群处于濒危或灭绝状态。在考虑近交衰退的影响后，遗传多样性水平降低，灭绝率提高；

Results indicated that inbreeding could cause the depression of immunological vigor as that of growth and disease resistance .

结果表明，近交能够影响对虾免疫性状的活性。