Open AccessReciprocal chromosome translocation with transfer of centromeric heterochromatin in the domestic pig karyotype
Author(s) -
GUSTAVSSON INGEMAR,
SETTERGREN INGEMAR
Publication year - 1984
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1984.tb00096.x
Subject(s) - biology , chromosomal translocation , karyotype , genetics , centromere , heterochromatin , meiosis , chromosome , robertsonian translocation , gene
G ustavsson , I. and S ettergren , I. 1984. Reciprocal chromosome translocation with transfer of centromeric heterochromatin in the domestic pig karyotype. — Hereditas 100: 1–5 Lund, Sweden. ISSN 0018–0661. Received March 11. 1983 A boar with normal sexual behaviour and normal semen picture but producing half the normal litter size was found to be the carrier of a rcp(7q‐;llq+). Several of his daughters in commercial herds were reported to farrow small litters. The translocation was also found in the sire of the boar, which demonstrated a fairly normal fertility and had been used extensively for breeding work. One of the chromosome breakages had occurred proximally in the q arm of chromosome 11 close to the centromere, with the transfer of centromeric heterochromatin to the chromosome arm 7q‐. There was a ring‐shaped quadrivalent in male meiosis, indicating a preferential 2:2 segregation. All offspring demonstrated normal or balanced heterozygous karyotypes in a 1:1 ratio.