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比較生物学のためのツールとして,複数の遺伝子から推論されたアジオスペルムの系統系は,比較生物学のためのツールとして使われています
P S Soltis1, D E Soltis, M W Chase
1School of Biological Sciences, Washington State University, Pullman 99164-4236, USA. psoltis@wsu.edu
Nature
|December 10, 1999
まとめ
この研究は,比較生物学にとって不可欠なアンジオスペルマの堅固な系統樹を提供している. 植物の進化,多様化パターン,遺伝子データ分析を理解するのに役立ちます.
科学分野:
- 進化生物学の進化生物学について
- フィロジェネティクス フィルジェネティクス
- ゲノミクスゲノミクスとは
背景:
- 比較生物学は,多様化と進化過程を研究するために正確な系統遺伝的枠組みに依存しています.
- 以前のアンジオスペルムの多様化の研究では,暗黙的または明示的な系統樹を用いた.
- 植物ゲノム進化と分子データを理解するには,系統遺伝学的視点が必要である.
研究 の 目的:
- 定着し,支えられた系統樹を,アニオスペルマのために構築する.
- 比較生物学の研究のための基礎的な系統遺伝的ツールを提供すること.
- 血管芽種における多様化パターンと進化論的仮説の研究を容易にする.
主な方法:
- DNA配列のパルシモニー分析.
- 利用されたプラスチド遺伝子 (rbcLとatpB) と核18SrDNA.
- 560種のアンジオスペルマと7種の非開花種子を分析した.
主要な成果:
- アンジオスペルムの強固な系統樹が生成されました.
- この木は,高解像度で,人間関係に強い支えを与えてくれます.
- 系統樹は,比較生物学における多様な応用に適しています.
結論:
- 開発された系統樹は,アニオスペルムの比較生物学にとって重要な資源となる.
- この枠組みは,多様化と進化のメカニズムについてのより深い洞察を可能にします.
- 遺伝データとゲノム保存の研究の堅実な分析を容易にする.
関連する概念動画
In-vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
The Y Chromosome Determines Maleness
The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size. Today,...
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size. Today,...
The Ratio of X Chromosome to Autosomes
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
Evolutionary Relationships through Genome Comparisons
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
In vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.

