Meiotic recombination in Turnera (Turneraceae): Extreme sexual difference in rates but no evidence for recombination suppression associated with the distyly (S) locus

Article Abstract:

The rate of recombination resulting from male vs. female meiosis was studied and crosses were performed using distylous Turnera subulata as well as cross involving the introgression of genes from T. krapovikasii into T. subulata. Substantial and consistent dimorphism in recombination rates was found with female meiosis but there was no evidence of recombination suppression around the S-locus because of an inversion or other chromosome rearrangements.

Canada, Sexual behavior, Physiological aspects, Genetic aspects, Genetic polymorphisms, Meiosis

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Distribution of style and pollen polygalacturonases among distylous and homostylous Turnera and Piriqueta spp. (Turneraceae)

Article Abstract:

The distribution of a style and pollen polygalacturonase in a number of distylous and homostylous species of Turnera, and two species of Piriqueta (Turneraceae) was explored. The results showed that none of the homostylous species possessed the style polygalacturonase but pollen polygalacturonase occurred in some of such species.

United States, Immunoblotting

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Inheritance of spontaneous mutant homostyles in Turnera subulata * krapovickasii and in autotetraploid T. scabra (Turneraceae)

Article Abstract:

The inheritance and compatibility behavior of two spontaneous homostyled mutants is determined for exploring the genetic architecture of distyly in Turnera spp. Pollen competition result in aberrant segregation ratios among some crosses and the inheritance of distyly in Turnera is underlied by a linked gene complex.

Gene mutations, Gene mutation, Pollen

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