种子园遗传间伐的空间优化

IF 2.5 3区 农林科学 Q1 FORESTRY
Kateřina Chaloupková, Milan Lstibůrek
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引用次数: 1

摘要

我们提供了一个数学模型来确定哪些树木应该从网格中排除,以促进遗传间伐下种子果园的随机交配。遗传间伐(roguing)是林木育种中一种常见的做法,目的是去除种子园中的劣质基因型,从而提高种子作物的遗传价值。目的建立遗传变薄空间优化的通用方法。它应促进随机交配,并考虑任何现有的种子园布局。方法该模型基于最优邻域分配算法(chaloupkov等人,Forests 10:1-6, 2019)。通过计算机仿真对算法的有效性进行了评价。采用完全随机方案作为参考。此外,本研究还提供了一个实际种子园的示范。结果在大范围的选择强度下,与完全随机分配相比,该方法在促进随机交配方面效率更高。我们建议线性部署作为在更高细化强度下计算最佳部署贡献的首选方法。该算法是用R语言编写的,并且是公开的。结论育种者可以在任何种子园布局的不同实际情况下,使用该软件并参照实例实施遗传间伐。该方法增强了随机交配,同时最大限度地提高了对选择的遗传反应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Spatial optimization of genetic thinning in seed orchards

Spatial optimization of genetic thinning in seed orchards

Key message

We provide a mathematical model to determine which trees should be ruled out from the grid to promote random mating in seed orchards under genetic thinning.

Context

Genetic thinning (roguing) is a common practice in forest tree breeding to remove inferior genotypes in seed orchards, thus boosting the genetic worth of the seed crop.

Aims

To develop a general methodology for spatial optimization of genetic thinning. It should promote random mating and consider any existing seed orchard layout.

Methods

The model is based on the Optimum-Neighborhood Allocation algorithm (Chaloupková et al., Forests 10:1-6, 2019). The algorithm’s efficiency was evaluated using computer simulation. A fully randomized scheme was used as a reference. In addition, the study provides a demonstration on an actual seed orchard.

Results

Simulations confirm the method’s efficiency in promoting random mating compared to the fully randomized allocation across a wide range of selection intensities. We suggest Linear Deployment as a preferred method for calculating optimum deployment contributions at higher thinning intensities. The algorithm was programmed in R and is publicly available.

Conclusion

Breeders can use the software and follow the example to implement genetic thinning in different practical scenarios assuming any seed orchard layout. The approach enhances random mating while maximizing genetic response to selection.

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来源期刊
Annals of Forest Science
Annals of Forest Science 农林科学-林学
CiteScore
6.70
自引率
3.30%
发文量
45
审稿时长
12-24 weeks
期刊介绍: Annals of Forest Science is an official publication of the French National Institute for Agriculture, Food and Environment (INRAE) -Up-to-date coverage of current developments and trends in forest research and forestry Topics include ecology and ecophysiology, genetics and improvement, tree physiology, wood quality, and silviculture -Formerly known as Annales des Sciences Forestières -Biology of trees and associated organisms (symbionts, pathogens, pests) -Forest dynamics and ecosystem processes under environmental or management drivers (ecology, genetics) -Risks and disturbances affecting forest ecosystems (biology, ecology, economics) -Forestry wood chain (tree breeding, forest management and productivity, ecosystem services, silviculture and plantation management) -Wood sciences (relationships between wood structure and tree functions, and between forest management or environment and wood properties)
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