通过稀缺测试提高基因组预测的可转移性
Osval A Montesinos-López1, Jose Crossa2,3, Paolo Vitale2
1Facultad de Telemática, Universidad de Colima, Colima 28040, Col., Mexico.
Genes
|July 29, 2025
概括
通过稀疏测试来提高基因组预测 (GP) 是至关重要的. 使用暂时相关的训练数据显著提高了预测准确性,特别是当数据来自类似的环境或时间段时.
科学领域:
- 农业科学 农业科学
- 遗传学 是一个遗传学.
- 植物育种 植物育种
背景情况:
- 基因组预测 (GP) 的效率对于大规模的育种计划至关重要.
- 需要少量测试策略来降低成本和物流挑战.
- 在稀疏测试下完善基因组选择 (GS) 是一个活跃的研究领域.
研究的目的:
- 评估一种稀疏测试方法,用于在未经测试的环境中预测线路性能.
- 评估结合外部培训数据对预测准确性的影响.
- 为了确定地理和时间相关数据在GP的最佳使用.
主要方法:
- 利用了来自CIMMYT (奥布雷贡,墨西哥) 的培训数据和来自印度的部分数据.
- 采用稀疏测试策略,利用墨西哥的观察预测印度的线路性能.
- 分析了训练集组成对预测准确性的影响.
主要成果:
- 将Obregon数据纳入训练集显著提高了预测准确度.
- 随着时间更接近的数据,预测准确度的增长更大.
- 皮尔森的相关性以50%的测试比例提高了219%以上;顶线识别也取得了实质性的收益.
结论:
- 丰富培训数据与相关的,暂时接近的信息是提高GP绩效的关键.
- 不相关或暂时相隔的数据可能会降低预测的准确性.
- 在稀疏测试中的战略数据集成对于高效的育种计划至关重要.
相关概念视频
Improving Translational Accuracy
2.7K
2.7K
Prediction Intervals
2.3K
The interval estimate of any variable is known as the prediction interval. It helps decide if a point estimate is dependable.
However, the point estimate is most likely not the exact value of the population parameter, but close to it. After calculating point estimates, we construct interval estimates, called confidence intervals or prediction intervals. This prediction interval comprises a range of values unlike the point estimate and is a better predictor of the observed sample value, y.
However, the point estimate is most likely not the exact value of the population parameter, but close to it. After calculating point estimates, we construct interval estimates, called confidence intervals or prediction intervals. This prediction interval comprises a range of values unlike the point estimate and is a better predictor of the observed sample value, y.
2.3K
Comparing Copy Number Variations and SNPs
17.9K
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
17.9K
Genome-wide Association Studies-GWAS
14.2K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
14.2K
Heritability
305
Heritability is a statistical concept that measures the degree to which genetic differences among individuals contribute to trait variations within a population. It is a fundamental idea in genetics, often prone to misinterpretation. Heritability is expressed as a percentage, reflecting the proportion of variation in a specific trait across a population that can be linked to genetic differences. However, it's important to understand that heritability does not determine how "genetic"...
305
Genomics
37.5K
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
37.5K


