Open AccessInheritance of tristyly in Oxalis tuberosa (Oxalidaceae)
Author(s) -
Trognitz B.R.,
Hermann M.
Publication year - 2001
Publication title -
heredity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.441
H-Index - 118
eISSN - 1365-2540
pISSN - 0018-067X
DOI - 10.1046/j.1365-2540.2001.00870.x
Subject(s) - biology , inheritance (genetic algorithm) , epistasis , mendelian inheritance , botany , genetics , evolutionary biology , gene
Frequencies of floral morphs in progenies obtained from a complete set of diallelic crosses among three accessions of tristylous, octoploid oca ( Oxalis tuberosa ) were used for a Mendelian analysis of floral morph inheritance. The frequencies observed had the best fit to a model of tetrasomic inheritance with two diallelic factors, S , s and M , m , with S being epistatic over M . No explanation could be found for the unexpected formation of a small percentage of short‐styled individuals in crosses between the mid‐styled and the long‐styled parent. For the acceptance of models of disomic and octosomic inheritance several additional assumptions would have to be made and therefore these modes of inheritance are less likely. Dosage‐dependent inheritance of floral morph was rejected. Only a small frequency (36%) of the cross progenies flowered, in contrast to the greater propensity for flowering of O. tuberosa accessions held at gene banks.