selection index

简明释义

选择性指标

英英释义

例句

1.In plant breeding, a selection index helps identify the most promising varieties for cultivation.

在植物育种中，选择指数有助于识别最有前途的栽培品种。

2.The farmer used a selection index to determine which cattle would produce the best offspring.

农民使用选择指数来确定哪些牛会生产出最好的后代。

3.By applying the selection index, breeders can make more informed decisions about which animals to mate.

通过应用选择指数，育种者可以更明智地决定配对哪些动物。

4.The selection index is a crucial tool in animal genetics for enhancing desirable traits.

选择指数是动物遗传学中增强优良性状的重要工具。

5.Researchers developed a new selection index to improve the efficiency of genetic selection in aquaculture.

研究人员开发了一种新的选择指数，以提高水产养殖中的遗传选择效率。

作文

In the realm of genetics and breeding, the concept of selection index plays a crucial role in determining the best individuals for reproduction. A selection index is a mathematical formula used to evaluate the genetic potential of animals or plants based on multiple traits. This method allows breeders to make informed decisions that enhance desirable characteristics while minimizing undesirable ones. By using a selection index, breeders can effectively combine traits such as growth rate, feed efficiency, and disease resistance into a single score, which simplifies the selection process.The importance of a selection index cannot be overstated. For instance, in livestock breeding, producers aim to improve specific traits that contribute to the overall profitability of their operations. A well-constructed selection index helps breeders identify which animals will pass on their favorable traits to the next generation. This is particularly significant in commercial farming, where the financial implications of breeding decisions can be substantial.Moreover, the selection index is not limited to agriculture; it also finds applications in various fields, including horticulture and aquaculture. In horticulture, for example, plant breeders utilize selection indices to create new varieties with improved yield, flavor, and resistance to pests. Similarly, in aquaculture, the selection index aids in selecting fish that grow faster and are more resilient to environmental changes.To construct a selection index, breeders must first identify the traits they wish to improve and assign a weight to each trait based on its economic importance. The weights reflect the relative contribution of each trait to the overall performance of the animal or plant. Once the weights are determined, the selection index can be calculated by summing the weighted trait values for each individual being evaluated. This score then guides breeders in making selection decisions.However, constructing an effective selection index requires careful consideration. Breeders must ensure that the traits included in the index are not only economically relevant but also genetically correlated. If two traits are negatively correlated, improving one may inadvertently lead to a decline in the other. Therefore, understanding the genetic relationships between traits is essential for developing a robust selection index.In conclusion, the selection index is a powerful tool in the field of genetics and breeding. It enables breeders to select individuals that will enhance desirable traits while reducing the prevalence of undesirable ones. By employing a selection index, breeders can make strategic decisions that ultimately lead to improved productivity and profitability in their operations. As the agricultural industry continues to evolve, the application of selection indices will remain vital for achieving sustainable and efficient breeding practices.

在遗传学和育种领域，选择指数的概念在确定最佳繁殖个体方面发挥着至关重要的作用。选择指数是一种数学公式，用于根据多个特征评估动物或植物的遗传潜力。这种方法使育种者能够做出明智的决策，从而增强期望的特征，同时最小化不希望的特征。通过使用选择指数，育种者可以有效地将生长速度、饲料效率和抗病能力等特征结合成一个单一的评分，从而简化选择过程。选择指数的重要性不容小觑。例如，在牲畜育种中，生产者旨在改善特定特征，以提高其运营的整体盈利能力。一个构建良好的选择指数帮助育种者识别哪些动物将把它们有利的特征传递给下一代。这在商业养殖中尤为重要，因为育种决策的财务影响可能是巨大的。此外，选择指数并不仅限于农业；它还在各种领域中找到应用，包括园艺和水产养殖。在园艺中，例如，植物育种者利用选择指数创造出具有更高产量、风味和抗虫害能力的新种类。同样，在水产养殖中，选择指数有助于选择生长更快且对环境变化更具抵抗力的鱼类。要构建选择指数，育种者必须首先确定他们希望改善的特征，并根据每个特征的经济重要性为其分配权重。这些权重反映了每个特征对动物或植物整体表现的相对贡献。一旦确定了权重，就可以通过对每个被评估个体的加权特征值求和来计算选择指数。这个分数随后指导育种者做出选择决策。然而，构建有效的选择指数需要仔细考虑。育种者必须确保纳入指数的特征不仅在经济上相关，而且在遗传上相关。如果两个特征呈负相关，改善一个特征可能会无意中导致另一个特征的下降。因此，了解特征之间的遗传关系对于开发稳健的选择指数至关重要。总之，选择指数是在遗传学和育种领域中的一种强大工具。它使育种者能够选择将增强期望特征的个体，同时减少不希望特征的流行。通过采用选择指数，育种者可以做出战略决策，最终提高其运营的生产力和盈利能力。随着农业行业的不断发展，选择指数的应用将在实现可持续和高效的育种实践中继续发挥重要作用。