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Related Concept Videos

Law of Independent Assortment02:03

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.
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Transient Gene Expression in Tobacco using Gibson Assembly and the Gene Gun
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Published on: April 18, 2014

Seed dispersal: same gene, different organs.

Charles S Gasser1, Marissa K Simon

  • 1Department of Molecular and Cellular Biology, University of California-Davis, 1 Shields Ave, Davis, CA 95616, USA. csgasser@ucdavis.edu

Current Biology : CB
|July 26, 2011
PubMed
Summary
This summary is machine-generated.

A single gene change explains why rice grains stay on the plant and why mustard fruits split differently. This discovery impacts understanding of plant domestication and evolution.

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Area of Science:

  • Plant genetics
  • Evolutionary biology
  • Agricultural science

Background:

  • Plant domestication involves selecting for desirable traits like grain retention.
  • Fruit dehiscence, the splitting of fruits, is a key trait in plant evolution and seed dispersal.
  • Promoter elements are crucial regulatory regions controlling gene expression.

Purpose of the Study:

  • To identify the genetic basis for human-selected grain retention in rice.
  • To investigate the genetic cause of natural variation in fruit dehiscence in mustards.
  • To determine if a shared genetic mechanism underlies these distinct plant traits.

Main Methods:

  • Comparative genomics analysis across rice and mustard species.
  • Identification and characterization of conserved promoter elements.
  • Functional validation of nucleotide changes using molecular biology techniques.

Main Results:

  • A single nucleotide polymorphism (SNP) in a conserved promoter region was identified.
  • This SNP is associated with increased grain retention in rice under human selection.
  • The same SNP explains natural variation in the dehiscence of fruit structures in mustard species.

Conclusions:

  • A conserved regulatory element, altered by a single nucleotide change, controls key domestication and evolutionary traits in plants.
  • This finding highlights the significant impact of small genetic changes in shaping plant diversity and agricultural development.
  • The study provides a molecular explanation for convergent evolution of traits in distinct plant lineages.