| Abstract Detail
Chromosome and Karyotype Evolution in Plants Kinosian, Sylvia [1], Rowe, Carol [2], Wolf, Paul [3]. Why do heterosporous plants have so few chromosomes? The mechanisms controlling chromosome number and genome size remain some of the least understood aspects of evolutionary biology. In vascular land plants, there is a striking disparity in chromosome number and genome size between homosporous and heterosporous lineages. The homosporous ferns have large genomes and high chromosome numbers compared to heterosporous ferns, lycophytes, and spermatophytes. Many studies have asked why homosporous plants have so many chromosomes, but here we consider why heterosporous plants have comparably so few chromosomes. We review the life history differences between heterosporous and homosporous plants, previous work on chromosome number and genome size in each lineage, known mechanisms of genome downsizing and chromosomal rearrangements, and conclude with future prospects for research on why heterosporous plants have so few chromosomes.
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1 - Utah State University, Biology, 5305 Old Main Hill, Logan, Utah, 84321, United States
2 - University of Alabama in Huntsville, Biology, 301 Sparkman Drive, Huntsville, AL, 35899, USA
3 - University of Alabama in Huntsville, 301 Sparkman Drive, Huntsville, AL, 35899, United States
Keywords:
none specified
Presentation Type: Colloquium Presentations
Session: C11, Chromosome and Karyotype Evolution in Plants
Location: /
Date: Friday, July 23rd, 2021
Time: 12:45 PM(EDT)
Number: C11011
Abstract ID:1005
Candidate for Awards:None |
