在葡萄藤 (Vitis vinifera L.) 中探索复杂特征的品种内变异.
Hannah Robinson1, Timo Strack1, Maximilian Schmidt1
1Department of Plant Breeding, Hochschule Geisenheim University, Geisenheim, Germany.
概括
几个世纪的葡萄藤克隆繁殖揭示了品种内的显著遗传多样性. 这种遗传变异为加速繁殖和适应气候变化的机会提供了机会,同时保持了品种完整性.
科学领域:
- 植物遗传学和育种.
- 葡萄种植和葡萄酒学
- 农业科学 农业科学
背景情况:
- 葡萄藤 (Vitis vinifera L.) 生产面临着气候变化的挑战,需要适应性育种.
- 克隆繁殖,虽然保留了品种身份,但由于长时间的繁殖周期,限制了遗传收益.
- 了解品种内遗传多样性对于改善葡萄藤适应性和育种效率至关重要.
研究的目的:
- 评估八个关键葡萄藤克隆种群中的表型和遗传变异.
- 估计多个特征的遗传性,遗传相关性和变异组件.
- 评估使用先进的繁殖策略来增强克隆选择的潜力.
主要方法:
- 分析了14年的数据,分析了8个葡萄品种的6个农学,质量和疾病特征.
- 应用线性混合模型来估计方差组件和遗传性.
- 计算特征之间的遗传相关性.
主要成果:
- 在所有评估的特征中观察到显著的品种内表型变异.
- 中等到高的遗传概率估计表明,基因对表型变异有很大的影响.
- 检测到大量的基因型-环境相互作用,影响特征表达.
- 基因相关性揭示了复杂的积极和消极特征关系.
结论:
- 葡萄树的高品种内遗传多样性是育种和适应的宝贵资源.
- 预测性育种工具 (基因组和现象选择) 可以增强克隆选择.
- 建议基于优化的多特征选择,特别是考虑到负特征相关性.
- 通过明智的选择策略,可以保持品种完整性,同时改善适应性.
更多相关视频
10:40Comprehensive Workflow for the Genome-wide Identification and Expression Meta-analysis of the ATL E3 Ubiquitin Ligase Gene Family in Grapevine
Published on: December 22, 2017
10.9K
07:34Author Spotlight: Exploring the Fermentation Microbiome Through Next-Generation Sequencing
Published on: December 1, 2023
1.1K
相关概念视频
01:25Genetic Variation
1.2K
Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
Genes exist in different versions called alleles,...
1.2K
01:49Multiple Allele Traits
37.9K
The Concept of Multiple Allelism
37.9K
01:20Monohybrid Crosses
238.7K
Overview
238.7K
01:19X-linked Traits
58.2K
In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
58.2K
01:06Heritability
569
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"...
569
01:18Dihybrid Crosses
80.8K
Overview
80.8K