Query (optional)   in Class  All Allele Author Colleague Collection Assembly Gene Gene Class Gene Product Germplasm Image Journal Keyword Library Locus Map Map Data Marker Pathology Polymorphism Probe Protein QTL Rearrangement Reference Sequence Species Trait Trait Study Two Point Data  

---

GrainGenes Reference Report: HER-72-549

[Submit comment/correction]

Reference	HER-72-549
Title	Non-random mating in a Secale cereale L. (rye) population
Journal	Heredity
Year	1994
Volume	72
Pages	549-556
Author	Polanco C Gonzalez C Vences F Perez-de-la-Vega M
Abstract	The mating system in an experimental population of rye (Secale cereale L. cv Merced was studied using eight polymorphic isozyme loci as genetic markers and two progeny samples from a large population: 20 emasculated mother plants (obligately cross-pollinating) and 100 non-emasculated mother plants Merced rye showed a significant frequency of self-fertilization (s=1-t) in a previous generation, but in the generation under study the outcrossing frequency was not significantly different from t=1 This fact suggests that environmental factors can affect the rate of outcrossing vs selfing (self-fertilization) In spite of the outcrossing rate of t=1, the large progenies from emasculated plants (100 seeds per plant,) demonstrated that pollination was not completely at random This represents a violation of the generally accepted mixed-mating model on which most methods used to estimate mating parameters are based. Temporal heterogeneity and the differential ability of gametophytes to fertilize are possible causes of the non-randomness of mating. It is concluded that, although violations of the assumption of the mixed-mating model can bias the estimates, most of the estimated outcrossing values clearly differ from complete outcrossing.
Keyword	[ Hide all but 1 of 13 ] cross-pollination enzyme-polymorphism gene-frequency genetic markers genetic models genotype isoenzyme loci mating open-pollination outcrossing secale cereale self-compatibility

GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.