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非添加剂监管赋予杂交玉米的表型变化

Tao Zhou¹, Jie Zhang², Yan Liang¹

¹National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China.

The New phytologist

|February 13, 2025

概括

了解杂交玉米的性能需要探索父母基因组相互作用. 这项研究揭示了非添加性定量特征位点 (QTLs) 如何调节基因表达和翻译,驱动植物高度变化,并提供对异构的见解.

科学领域:

植物遗传学和基因组学
玉米育种和遗传学玉米育种和遗传学

背景情况:

在塑造混合性能方面对父母基因组相互作用的理解有限.
植物高度 (PH) 是杂交玉米的一个关键特征,受复杂的遗传因素的影响.

研究的目的:

阐明混合玉米的PH变化背后的监管机制.
研究基因间相互作用在非添加性基因调节和表型结果中的作用.

主要方法:

全基因组关联研究 (GWAS) 和表达量化特征位点 (eQTLs) 映射.
全转录组关联映射 (TWAS) 和异位基因特异性表达分析.
在父母和杂交玉米种群中分析转录组和转录组数据.

主要成果:

QTLs,eQTLs和TWAS相关基因 (TAGs) 在母体和杂交种群之间显示出不同的和保存的模式.
遵循功能路径 (FR) 的QTL对PH和基因表达有显著的非添加效应.
涉及异构细胞中eQTLs的基因间相互作用驱动eGenes的非添加调节,将其转化为TAG,eQTL转化为PH的非添加QTL.

结论:

非添加性QTL在杂交玉米的表型变异中起着至关重要的作用,特别是在植物高度方面.
基因间相互作用和非添加性基因调节是植物异构的关键机制.
这项研究为玉米中杂交活力的遗传基础提供了新的视角.

关键词:

异质化异质化是什么意思基因间调节是一种基因间调节.玉米玉米玉米是一种非添加剂监管的法规.植物激素路径的方法

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相关概念视频

Law of Independent Assortment

Law of Independent Assortment

While Mendel’s Law of Segregation states that the two alleles for one gene are separated into different gametes, a different question of how different genes are inherited remains. For example, is the gene for tall plants inherited with the gene for green peas? Mendel asked this question by experimenting with a dihybrid cross; a cross in which both parents are homozygous for two distinct traits resulting in an F1 generation that are heterozygous for both traits.

Incomplete Dominance

Incomplete Dominance

Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.

Dihybrid Crosses

Dihybrid Crosses

Monohybrid Crosses

Monohybrid Crosses

Law of Segregation

Law of Segregation

When crossing pea plants, Mendel noticed that one of the parental traits would sometimes disappear in the first generation of offspring, called the F1 generation, and could reappear in the next generation (F2). He concluded that one of the traits must be dominant over the other, thereby causing masking of one trait in the F1 generation. When he crossed the F1 plants, he found that 75% of the offspring in the F2 generation had the dominant phenotype, while 25% had the recessive phenotype.

Trihybrid Crosses

Trihybrid Crosses

Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...