Jm. Greeff et Mh. Villet, DEDUCING THE COEFFICIENT OF RELATIONSHIP BY THE AMOUNT OF RECOMBINATION PRODUCED DURING AUTOMICTIC PARTHENOGENESIS, Heredity, 70, 1993, pp. 499-502
Recombination occurs in automictic parthenogens, but it is localized t
o the DNA between the chiasma and the telomere if central fusion (fusi
on of non-sister nuclei of meiosis II) occurs, and to the DNA between
the chiasma and the centromere if terminal fusion (of sister nuclei of
meiosis II) occurs. Independent assortment of recombined DNA leads to
more variability. Here it is argued that by comparing heritabilities
obtained from sib analysis of sexually-reproducing individuals with he
ritabilities obtained from parent-offspring regressions of automictic
individuals, one can obtain an estimate of the coefficient of relation
ship (r) between automictically produced offspring and their parents.
The coefficient of relationship for different traits will differ and c
an be related to the average position (in relation to chiasmata) of ge
nes affecting the trait or to the heterozygosity of the genes.