selfing

简明释义

英[ˈselfɪŋ]美[ˈselfɪŋ]

n. [植] 自交；自花授精；自体受精

英英释义

单词用法

同义词

反义词

例句

1.Brassica napus L. is an often cross-pollinated plant, and is not generally considered selfing recession, but it was little reported about effects of selfing on main traits of Brassica napus L.

甘蓝型油菜属于常异花授粉植物，一般认为自交不会产生衰退现象，但多代连续自交对甘蓝型油菜究竟有何影响鲜见报道。

2.Brassica napus L. is an often cross-pollinated plant, and is not generally considered selfing recession, but it was little reported about effects of selfing on main traits of Brassica napus L.

甘蓝型油菜属于常异花授粉植物，一般认为自交不会产生衰退现象，但多代连续自交对甘蓝型油菜究竟有何影响鲜见报道。

3.Pollen fertility was observed in two successive selfing generations on a two-line sterility line, Zao S, which proved that the pollen fertility in the population showed a normal distribution.

通过早S连续两个世代花粉染黑率的观测，证实群体育性呈正态分布。

4.The study also indicated that homozygosity by selfing could significantly enhance the mean resistance level of O. rufipogon and O. officinalis.

研究还表明，自交提纯能够明显提高这两种野生稻的平均抗性水平。

5.Selfing heterozygotes halves the heterozygosity, and thus outbreeding maintains heterozygosity and produces a more adaptable population.

自交杂合子有一半杂合性，因此远系繁殖可以产生适应能量更强的种群。

6.A combination of dichogamy and herkogamy in hermaphroditic plants is an effective mechanism to encourage outcrossing and avoid selfing.

雌雄异熟和异型花在一些被子植物中的共同存在被认为是一种有效避免两性花植物自交并促进异交的机制。

7.Key findings are as follows: 1. Selfing had significant impacts on the main economic characters of Brassica napus l.

主要研究结果如下：1。自交对甘蓝型油菜主要经济性状有显著影响。

8.Selfing progeny of E. urophylla showed depression in general, but some other combinations showed self-advantage.

尾叶桉自交后代普遍存在衰退现象，但亦有个别组合表现出一定的自交优势。

9.Many progenies were obtained by a Brassica oleracea-Sinapis alba monosomic alien addition line plant selfing.

将甘蓝-白芥单体异附加系自交，获得了其自交后代。

10.In some plants, selfing 自交 can lead to a decrease in genetic diversity.

在某些植物中，自交可能导致遗传多样性的减少。

11.Many species rely on selfing 自交 as a reproductive strategy when pollinators are scarce.

许多物种在授粉者稀缺时依赖于自交作为繁殖策略。

12.Researchers study selfing 自交 to understand its impact on evolution.

研究人员研究自交以了解其对进化的影响。

13.The phenomenon of selfing 自交 is common in many flowering plants.

在许多开花植物中，自交现象很常见。

14.Some crops are bred for selfing 自交 to ensure consistent yields.

一些农作物被培育为自交以确保稳定的产量。

作文

In the world of biology, the term selfing refers to a process where an organism fertilizes itself, leading to the production of offspring that are genetically similar to the parent. This phenomenon is particularly common in plants, where certain species have evolved mechanisms to ensure their survival and reproduction even in the absence of a mate. Understanding selfing can provide insights into the evolutionary strategies of various organisms and their adaptations to environmental challenges. One of the most fascinating aspects of selfing is its role in ensuring reproductive success. In environments where pollinators are scarce or where individuals are isolated from others of their species, self-fertilization becomes a reliable method for producing seeds. For example, many flowering plants, such as the common dandelion, can reproduce through selfing, allowing them to thrive in diverse habitats. This ability to reproduce without a partner can be a significant advantage in unstable or unpredictable environments. However, selfing is not without its drawbacks. While it guarantees offspring production, it can also lead to a decrease in genetic diversity. Offspring produced through selfing are often more similar to each other and to their parent, which can make populations more susceptible to diseases and environmental changes. This lack of genetic variation can hinder a population's ability to adapt over time, potentially leading to its decline. Researchers have studied various plant species to understand the implications of selfing on genetic diversity and population dynamics. For instance, studies on the Arabidopsis thaliana plant have shown that while selfing can be beneficial for immediate reproduction, it may compromise long-term survival if the environment changes drastically. The balance between self-fertilization and cross-fertilization is crucial, as it allows populations to maintain genetic diversity while still benefiting from the ability to reproduce independently when necessary. In addition to plants, selfing is also observed in some animal species, such as certain types of hermaphroditic snails and flatworms. These organisms possess both male and female reproductive organs, allowing them to engage in selfing as a reproductive strategy. This adaptability can be advantageous in environments where finding a mate is difficult, but like plants, these species also face the risks associated with reduced genetic diversity. The study of selfing extends beyond biology into ecology and conservation. Understanding the mechanisms and consequences of selfing can inform conservation strategies for endangered species. For example, if a species is known to rely heavily on selfing, conservationists may need to consider the implications of low genetic diversity when planning reintroduction programs or habitat restoration efforts. In conclusion, the concept of selfing plays a vital role in the reproductive strategies of many organisms. While it can offer immediate benefits in terms of reproduction, it also carries potential risks related to genetic diversity and adaptability. As researchers continue to explore the complexities of selfing, we gain a deeper understanding of how life persists and evolves in a constantly changing world. The balance between self-fertilization and cross-fertilization remains a critical area of study in the fields of biology and ecology, shedding light on the intricate relationships between organisms and their environments.

在生物学的世界中，术语自我授粉指的是一种生物体自我受精的过程，从而产生与亲本基因相似的后代。这种现象在植物中尤为常见，某些物种已经进化出机制，以确保它们在没有配偶的情况下也能生存和繁殖。理解自我授粉可以提供对各种生物的进化策略及其适应环境挑战的深入见解。 自我授粉最引人注目的方面之一是它在确保繁殖成功中的作用。在授粉者稀缺或个体彼此隔离的环境中，自我受精成为生产种子的可靠方法。例如，许多开花植物，如普通蒲公英，可以通过自我授粉繁殖，使其能够在多样的栖息地中茁壮成长。这种在没有伴侣的情况下繁殖的能力在不稳定或不可预测的环境中可能是一种显著的优势。 然而，自我授粉并非没有缺点。虽然它保证了后代的产生，但也可能导致遗传多样性的减少。通过自我授粉产生的后代通常彼此之间以及与其亲本相似，这可能使种群更容易受到疾病和环境变化的影响。这种遗传变异的缺乏可能妨碍种群随着时间的推移适应，可能导致其衰退。 研究人员对各种植物物种进行了研究，以了解自我授粉对遗传多样性和种群动态的影响。例如，对阿拉伯芥（Arabidopsis thaliana）植物的研究表明，尽管自我授粉在短期内对繁殖有利，但如果环境发生剧烈变化，它可能会妨碍长期生存。自我授粉和异花授粉之间的平衡至关重要，因为它使种群能够在必要时保持遗传多样性，同时仍然受益于独立繁殖的能力。 除了植物，某些动物物种如某些类型的雌雄同体蜗牛和平面虫中也观察到了自我授粉。这些生物同时拥有雄性和雌性生殖器官，使它们能够将自我授粉作为一种繁殖策略。这种适应性在寻找伴侣困难的环境中可能是有利的，但与植物一样，这些物种也面临着与遗传多样性降低相关的风险。 自我授粉的研究不仅限于生物学，还延伸到生态学和保护领域。理解自我授粉的机制和后果可以为濒危物种的保护策略提供信息。例如，如果某一物种被认为高度依赖自我授粉，保护者在规划重新引入项目或栖息地恢复工作时，可能需要考虑低遗传多样性的影响。 总之，自我授粉的概念在许多生物的繁殖策略中起着至关重要的作用。虽然它在繁殖方面可以提供即时的好处，但也存在与遗传多样性和适应能力相关的潜在风险。随着研究人员继续探索自我授粉的复杂性，我们对生命如何在不断变化的世界中持续存在和进化有了更深入的理解。自我受精与异花授粉之间的平衡仍然是生物学和生态学领域的关键研究领域，揭示了生物与其环境之间错综复杂的关系。