Title

Polyploidy in T.laxa and Geographic Distribution

Poster Number

10

Lead Author Major

Pre-Pharmacy

Format

Poster Presentation

Faculty Mentor Name

Dale McNeal

Faculty Mentor Department

Biological Sciences

Abstract/Artist Statement

Polyploidy is of particular interest in plants as it can result in reproductive isolation which can lead to speciation. Triteleia laxa (Amaryllidaceae) is an example of polyploidy in a species that shows very little morphologic variation across several different chromosome counts. Prior to our investigation diploid chromosome numbers of 14, 16, 21, 24, 28, 32, 42, and 48 were reported in the literature (Johansen, 1932; Burbanck, 1942). Our investigation has revealed that in addition to the previously discovered chromosomes series with base numbers x=7 and x=8, there is also a chromosome series with x=6. Newly observed chromosome counts of 2n=12 and 2n=18 lead to this conclusion. We present distribution maps of all chromosomal races and photomicrographs of all known chromosome complements.

Location

DeRosa University Center, Ballroom

Start Date

21-4-2011 6:00 PM

End Date

21-4-2011 8:00 PM

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Apr 21st, 6:00 PM Apr 21st, 8:00 PM

Polyploidy in T.laxa and Geographic Distribution

DeRosa University Center, Ballroom

Polyploidy is of particular interest in plants as it can result in reproductive isolation which can lead to speciation. Triteleia laxa (Amaryllidaceae) is an example of polyploidy in a species that shows very little morphologic variation across several different chromosome counts. Prior to our investigation diploid chromosome numbers of 14, 16, 21, 24, 28, 32, 42, and 48 were reported in the literature (Johansen, 1932; Burbanck, 1942). Our investigation has revealed that in addition to the previously discovered chromosomes series with base numbers x=7 and x=8, there is also a chromosome series with x=6. Newly observed chromosome counts of 2n=12 and 2n=18 lead to this conclusion. We present distribution maps of all chromosomal races and photomicrographs of all known chromosome complements.