Poster: Comparative Genomics

Abs # 921: Genetic variation in trifolium bolanderi a. gray, a narrow endemic, compared with trifolium longipes nutt.

Presenter:	Denton, Renee , rdenton@fs.fed.us
Authors	Denton, Renee  (A)
Affiliations:	(A): Pacific Southwest Research Station

Genetic structure and gene flow were investigated within and among populations of Trifolium bolanderi A. Gray (Fabaceae), a narrow endemic to mountain meadows of the Sierra Nevada. Diversity indices were compared and contrasted with that of a common, sympatric, native congener, Trifolium longipes Nutt. Sixteen putative loci were resolved for 10 paired meadow populations using starch gel electrophoresis. Mean expected heterozygosity (H_e) within populations of T. bolanderi (0.17) was lower than within populations of T. longipes (0.24) as expected when comparing spatial data for other rare and widespread congeners. Percentage of polymorphic loci (%P) for T. bolanderi (43.13) was also lower than for T. longipes (56.88) at the population level. Interpopulation level heterozygosity for T. bolanderi , 0.20, did not exceed that of T. longipes , 0.29, as expected. Surprisingly high polymorphism was detected for both species.