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POLYMORPHISM REGENERATION FOR A NEUTRALIZED SELFISH B CHROMOSOME
Author(s) -
Zurita S.,
Cabrero J.,
LópezLeón M. D.,
Camacho J. P. M.
Publication year - 1998
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.1998.tb05163.x
Subject(s) - biology , grasshopper , genetics , genome , population , chromosome , evolutionary biology , gene , ecology , demography , sociology
Long‐run evolution of B chromosomes is mainly made up by an evolutionary arms race between these selfish genetic elements and the standard genome. The suppression of B drive is one of the clearest expressions of genome defense against B chromosomes. After drive neutralization, the B is condemned to extinction unless a new variant showing drive can emerge and replace it. This paper reports the first empirical evidence for the substitution of a neutralized B variant by a new selfish B variant. Such a polymorphism regeneration has recently taken place in a natural population of the grasshopper Eyprepocnemis plorans .