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Abstract Detail

Population Genetics

Guerra-García, Azalea [1], Golubov, Jordan [2], Mandujano, Maria [3].

Low genetic diversity in the invasive species Kalanchoe delagoensis (Crassulaceae).

Kalanchoe delagoensis (Crassulaceae) is an invasive species in the United States, South Africa and Australia, and is naturalized in Mexico. It is a tetraploid plant from Mozambique and Madagascar, known as mother of millions because of the numerous asexual plantlets that grow from the margin of their leaves and that have high survival. Using eight microsatellites, we evaluated the genetic diversity of four Mexican populations(Mexico City, Mesa de Leon, Cadereyta and Tula). We only found four multiloci genotypes (A, B, C, D). Genotype A was the most abundant, and was the only genotype present in three populations (Mexico City, Mesa de Leon and Cadereyta). On the other hand,genotypes B, C, and D were only found in the Tula population in low relative frequencies (0.175, 0.10, and 0.05 respectively). The mean number of allele per locus was 2.12, and 75% of loci were polymorphic. A similar study, using the same microsatellite, found high genetic diversity in the Madagarcar populations, while an introduced Australian population has intermediate diversity. The results show that the Mexican populations are maintained exclusively by clonal growth, except in Tula. However the genetic diversity in this population is extremely low and the genotypes B, C and D are subsets of genotype A, which possibly indicate that the invasion of K. delagoensis occurred from a unique introduction event or that only one genotype has successfully established.

Broader Impacts:

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1 - Universidad Nacional Autónoma de México, Instituto de Ecología, Circuito Exterior s/n, Ciudad Universitaria, Avenida Universidad 3000, Mexico City, DF, 04510, Mexico
2 - Universidad Autonoma Metropolitana Xochimilco, Calz. Del Hueso 1100, Col. Villa Quietud Coyoacan, Mexico City, 04960, México
3 - Instituto De Ecologia, UNAM, INSTITUTO DE ECOLOGIA, UNAM, Apartado Postal 70-275, Ciudad Universitaria, MEXICO, N/A, 04510, Mexico

biological invasion
genetic diversity

Presentation Type: Poster:Posters for Topics
Session: P
Location: Grand Salon A - D/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 5:30 PM
Number: PPG001
Abstract ID:146
Candidate for Awards:None

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