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Sperm competition in Callosobruchus maculatus (Coleoptera: Bruchidae): a comparison of two methods used to estimate paternity
Author(s) -
EADY P. E.
Publication year - 1991
Publication title -
ecological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.865
H-Index - 81
eISSN - 1365-2311
pISSN - 0307-6946
DOI - 10.1111/j.1365-2311.1991.tb00191.x
Subject(s) - biology , callosobruchus maculatus , sperm , zygote , sperm competition , competition (biology) , human fertilization , offspring , pest analysis , zoology , genetics , botany , ecology , embryo , embryogenesis , pregnancy
.1 This study investigates sperm competition in Cullosobruchus maculatus (F.) (Coleoptera: Bruchidae), and is the first study to make a direct, controlled comparison of the sterile male and genetic marker techniques to estimate sperm precedence. 2 P 2 values (the proportion of offspring fathered by the second male) obtained from the two methods were similar: P 2 (sterile male) = 0.82, P 2 (genetic marker) = 0.85. Both methods are therefore suitable for studying sperm precedence if the appropriate correction factors are applied. 3 The importance of general fertilization ability, differential fertilizing capacity and differential zygote mortality are examined and discussed.