mass selection

简明释义

混合选择

英英释义

例句

1.The mass selection technique allows researchers to quickly identify superior plants.

该优良种群选择技术使研究人员能够快速识别出优良植物。

2.The farmer used mass selection to choose the best crops for next season.

农民使用优良种群选择来挑选下一季的最佳作物。

3.Through mass selection, we can improve yield and disease resistance in crops.

通过优良种群选择，我们可以提高作物的产量和抗病能力。

4.The process of mass selection is crucial in developing new varieties of fruits.

在开发新水果品种的过程中，优良种群选择是至关重要的。

5.In animal breeding, mass selection is often employed to enhance desirable traits.

在动物繁育中，通常采用优良种群选择来增强理想特征。

作文

In the field of genetics, the concept of mass selection refers to a breeding method that involves selecting individuals with desirable traits from a large population to produce the next generation. This technique has been widely used in agriculture and animal husbandry to enhance specific characteristics such as yield, disease resistance, and overall performance. The fundamental principle behind mass selection is to increase the frequency of favorable alleles within a population over time. By choosing the best individuals based on their phenotypic expression, breeders can effectively steer the genetic direction of a species or strain.The process of mass selection begins with the identification of a target trait. For instance, farmers may aim to improve the drought resistance of a particular crop variety. Once the trait is defined, the next step involves evaluating a large number of individuals within the population to identify those that exhibit the desired characteristics. This evaluation can be based on visual inspections, measurements, or even molecular techniques that assess genetic markers associated with the trait.After identifying the best individuals, these selected plants or animals are allowed to reproduce. The offspring produced from this mass selection process are then evaluated in subsequent generations, continuing the cycle of selection. Over time, this repeated selection can lead to significant improvements in the population's overall quality. One of the advantages of mass selection is its simplicity; it does not require advanced technology or extensive knowledge of genetics, making it accessible to many breeders.However, mass selection also has its limitations. One major concern is the potential loss of genetic diversity. By continuously selecting only a few individuals, there is a risk that other valuable traits may be lost over time. This reduction in genetic variation can make the population more susceptible to diseases and environmental changes. Therefore, it is crucial for breeders to balance their selection strategies with efforts to maintain genetic diversity within the population.In conclusion, mass selection is a powerful tool in the hands of breeders, enabling them to enhance specific traits in crops and livestock. While it offers a straightforward approach to improving agricultural productivity, careful consideration must be given to the long-term implications of reducing genetic diversity. By understanding both the benefits and challenges associated with mass selection, breeders can make informed decisions that promote sustainable practices in agriculture and animal husbandry.

在遗传学领域，mass selection（群体选择）的概念指的是一种育种方法，涉及从一个大群体中选择具有理想特征的个体，以产生下一代。这种技术在农业和畜牧业中被广泛使用，以增强特定特性，如产量、抗病能力和整体表现。mass selection的基本原理是随着时间的推移，增加群体中有利等位基因的频率。通过根据表型表现选择最佳个体，育种者可以有效地引导物种或品系的遗传方向。mass selection的过程始于目标特征的识别。例如，农民可能希望改善某一作物品种的抗旱能力。一旦定义了特征，下一步就是评估群体中的大量个体，以识别那些表现出所需特征的个体。此评估可以基于视觉检查、测量，甚至是评估与该特征相关的遗传标记的分子技术。在识别出最佳个体后，这些选定的植物或动物被允许繁殖。通过这一mass selection过程产生的后代将在随后的世代中进行评估，继续选择的循环。随着时间的推移，这种重复选择可以显著改善群体的整体质量。mass selection的一个优点是其简单性；它不需要先进的技术或广泛的遗传学知识，使得许多育种者都能接触到。然而，mass selection也存在其局限性。一个主要问题是潜在的遗传多样性丧失。通过持续选择仅少数个体，存在其他有价值特征可能随时间流逝而丢失的风险。这种遗传变异的减少可能使群体更容易受到疾病和环境变化的影响。因此，育种者必须平衡他们的选择策略与维护群体内遗传多样性的努力。总之，mass selection是育种者手中的一种强大工具，使他们能够增强农作物和牲畜的特定特征。虽然它提供了一种改善农业生产力的简单方法，但必须仔细考虑减少遗传多样性的长期影响。通过理解与mass selection相关的好处和挑战，育种者可以做出明智的决策，以促进农业和畜牧业的可持续实践。