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- W4256239114 abstract "Deviations from Mendelian ratios are frequently treated as an intrinsic property of individuals, independent of the environment. We tested whether the environment of the parents could alter patterns of inheritance in the wild radish, Raphanus sativus. We demonstrated the genetic basis of 12 isozyme loci by controlled pollinations of unstressed plants. The frequency of deviant segregation detected was not different than that expected by chance. Controlled pollinations among stressed plants showed over 3 times as much deviant segregation as the unstressed controls. No genetic correlates of segregation bias were detected. Linkage was assessed for 64 of the 66 pairs of loci. Two linkage groups were detected, one involving four loci (PGM2–ACO–ACP–LAP), the other involving a single pair (EST-PRX). The second linkage group is apparently associated with a locus or tightly linked loci which may segregate for “balanced” lethals on the same chromosome. Deviant segregation did not appear to act primarily by selection on a particular gamete. Postzygotic selection was the probable source of at least some of the aberrant segregation. Because no particular allele was favored in such situations, selection is apparently operating on alleles at linked loci rather than on the allozyme loci per se. Data from other studies on wild radish support the suggestion that postzygotic selection might be an important influence on progeny segregation ratios. Because wild radishes often encounter a variety of stresses in the field, in this species, aberrant segregation may be common under natural conditions." @default.
- W4256239114 created "2022-05-12" @default.
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- W4256239114 date "1989-01-01" @default.
- W4256239114 modified "2023-10-18" @default.
- W4256239114 title "Transmission Genetics of Isozyme Loci in Raphanus sativus (Brassicaceae): Stress-Dependent Non-Mendelian Segregation" @default.
- W4256239114 doi "https://doi.org/10.2307/2444771" @default.
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