backcrossed

简明释义

英[ˈbæk.krɒst]美[ˈbæk.kraʊst]

回交

使回交（ backcross 的过去式和过去分词）

英英释义

单词用法

同义词

反义词

例句

1.The male-sterile plants from the crosses between dominant male-sterile hexaploid triticale and durum wheat as well as bearded wheat were backcrossed many times with the same male parents.

用已育成的显性雄性不育六倍体小黑麦为母本分别与硬粒小麦、二粒小麦及黑麦杂交，并每代选不育株用原父本回交。

2.The male-sterile plants from the crosses between dominant male-sterile hexaploid triticale and durum wheat as well as bearded wheat were backcrossed many times with the same male parents.

用已育成的显性雄性不育六倍体小黑麦为母本分别与硬粒小麦、二粒小麦及黑麦杂交，并每代选不育株用原父本回交。

3.F1 females could be backcrossed to the male homozygous recessive parent.

也可用雌性F1与隐性纯合雄性亲本回交。

4.Their F_2 is backcrossed with 7902- 4, and F_2 of this backcross is backcrossed again with 40354, and then selected by using the modified pedigree and bulk selection procedure.

回交亲本为7902-4和40354。杂种第二代用7902-4进行回交，回交第二代用40354再次回交，之后用改良系谱混合选择法进行选育。

5.The dog breed was backcrossed 回交 with a purebred to improve its health characteristics.

为了改善其健康特征，这个犬种与纯种犬进行了回交。

6.The scientists reported that the backcrossed 回交 mice showed improved cognitive functions.

科学家报告称，经过回交的小鼠表现出更好的认知功能。

7.Farmers often backcrossed 回交 their crops to maintain yield and disease resistance.

农民们经常对他们的作物进行回交，以保持产量和抗病性。

8.In genetic studies, researchers often use backcrossed 回交 strains to isolate specific traits.

在遗传研究中，研究人员经常使用回交品系来分离特定性状。

9.The new hybrid plant was backcrossed 回交 with its parent species to enhance its drought resistance.

这种新杂交植物与其亲本物种进行了回交，以增强其抗旱能力。

作文

In the world of genetics, the term backcrossed refers to a specific breeding technique used to enhance certain traits in organisms. This method involves crossing a hybrid organism with one of its parents or an individual genetically similar to its parent. The primary goal of this technique is to introduce desirable characteristics from the parent into the offspring while maintaining the genetic integrity of the original species. Understanding the process of backcrossed breeding can provide insights into various fields, including agriculture, animal husbandry, and conservation biology.For instance, consider a scenario where scientists are trying to develop a new strain of crops that are resistant to pests. They might create a hybrid plant by crossing a pest-resistant variety with a high-yielding variety. However, this hybrid may not exhibit the desired level of pest resistance. To enhance this trait, researchers can employ the backcrossed method. By crossing the hybrid plant back with the pest-resistant parent, they can increase the likelihood of producing offspring that inherit the pest resistance while still benefiting from the high yield of the other parent.The backcrossed approach is not limited to plants; it is also widely used in animal breeding. For example, dog breeders often use this technique to reinforce specific traits in a breed. If a breeder wants to enhance the coat color of a particular breed, they might first cross a purebred dog with another breed that has the desired coat color. Then, to maintain the original breed's characteristics while achieving the desired coat color, they would backcrossed the hybrid offspring with a purebred member of the original breed. This careful selection process ensures that the final offspring retain the essential traits of the original breed while incorporating the new desired feature.Moreover, backcrossed breeding plays a crucial role in conservation efforts. Many endangered species are at risk due to a lack of genetic diversity. Conservationists can use backcrossed techniques to introduce genes from closely related species to bolster the genetic health of a population. This practice helps to prevent inbreeding and increases the chances of survival for these vulnerable species.However, the backcrossed method is not without its challenges. One significant concern is the potential for unintended consequences. When manipulating the genetic makeup of organisms, there is always a risk that other traits may be affected, leading to unforeseen issues. Therefore, thorough research and careful planning are essential to ensure that the benefits of backcrossed breeding outweigh any potential drawbacks.In conclusion, the concept of backcrossed breeding is a powerful tool in genetics that allows scientists and breeders to enhance specific traits while preserving the overall integrity of a species. Whether in agriculture, animal husbandry, or conservation, understanding and applying this technique can lead to significant advancements. As we continue to explore the potential of genetic manipulation, the importance of ethical considerations and ecological impacts must remain at the forefront of our efforts. Through responsible use of backcrossed methods, we can work towards a future where both biodiversity and agricultural productivity thrive together.

在遗传学的世界中，术语backcrossed指的是一种特定的育种技术，用于增强生物体中的某些特征。这种方法涉及将杂交生物与其父母之一或与其父母在基因上相似的个体交叉。该技术的主要目标是将来自父母的可取特性引入后代，同时保持原始物种的遗传完整性。理解backcrossed育种过程可以为农业、动物饲养和保护生物学等多个领域提供见解。例如，考虑一个科学家试图开发一种对害虫抵抗的新作物品种的场景。他们可能通过将抗虫害的品种与高产的品种交叉来创建一个杂交植物。然而，这种杂交植物可能没有表现出所需的抗虫害水平。为了增强这一特征，研究人员可以采用backcrossed方法。通过将杂交植物与抗虫害的父母重新交配，他们可以增加产生继承抗虫害能力的后代的可能性，同时仍然受益于另一父母的高产量。backcrossed方法不仅限于植物，它在动物育种中也被广泛使用。例如，狗 breeders 经常使用这种技术来强化某个品种的特定特征。如果 breeders 想要增强某个特定品种的毛色，他们可能会首先将一只纯种狗与另一种具有所需毛色的品种交叉。然后，为了维持原始品种的特征，同时实现所需的毛色，他们会将杂交后代与原始品种的纯种成员进行backcrossed。这一精心选择的过程确保最终的后代保留原始品种的基本特征，同时融入新的期望特征。此外，backcrossed育种在保护工作中发挥着至关重要的作用。许多濒危物种由于缺乏遗传多样性而面临风险。保护主义者可以使用backcrossed技术将近亲物种的基因引入种群，以增强遗传健康。这一做法有助于防止近亲繁殖，并增加这些脆弱物种的生存机会。然而，backcrossed方法并非没有挑战。一个重要的担忧是潜在的意外后果。在操纵生物体的遗传组成时，总是存在其他特征可能受到影响的风险，从而导致不可预见的问题。因此，彻底的研究和仔细的计划对于确保backcrossed育种的好处超过任何潜在缺点至关重要。总之，backcrossed育种的概念是遗传学中的一种强大工具，使科学家和育种者能够增强特定特征，同时保持物种的整体完整性。无论是在农业、动物饲养还是保护方面，理解和应用这一技术都能带来显著进展。随着我们继续探索基因操作的潜力，伦理考虑和生态影响的重要性必须始终放在我们努力的前沿。通过负责任地使用backcrossed方法，我们可以朝着一个生物多样性和农业生产力共同繁荣的未来努力。