アラビドプシスの花型ホメオティック遺伝子APETALA1の分子特性
M A Mandel1, C Gustafson-Brown, B Savidge
1Department of Biology, University of California, San Diego, La Jolla 92093-0116.
Nature
|November 19, 1992
まとめ
APETALA1遺伝子は,花のメリステムのアイデンティティを調節することによって,花の発達を開始するために重要である. この遺伝子は,アラビドプシス菌の分葉と花びらの発達を決定する転写因子をコードする.
科学分野:
- 植物生物学 植物生物学
- 発達遺伝学 発達遺伝学
背景:
- 花の発達には,メリステムの移行と臓器の分化が含まれます.
- 花のメリステムと臓器のアイデンティティを制御する遺伝子は,アラビドプシス・サリアナのようなモデル植物で特定されています.
研究 の 目的:
- APETALA1遺伝子をクローンし,特徴づけること.
- APETALA1が花のメリステムの移行と臓器の発達における役割を調査する.
主な方法:
- APETALA1.1の遺伝子クローニング
- APETALA1の遺伝子発現パターン (RNA局所化) の分析.
主要な成果:
- APETALA1はMADSドメインの転写因子をコードする.
- APETALA1 RNAは若い花のプリモルディアで発現し,後にセパルと花びらに局所化します.
- APETALA1は花束から花のメリシステムへの移行に不可欠です.
結論:
- APETALA1は,花のメリステムのアイデンティティを特定するために,局所的に作用します.
- APETALA1はセパルと花の発達に重要な役割を果たしています.
関連する概念動画
Monohybrid Crosses
Overview
Dihybrid Crosses
Overview
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.
Test Cross
Alleles are different forms of the same gene. Humans and other diploid organisms inherit two alleles of every gene, one from each parent.
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 chance to...
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 chance to...
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.


