Abstract
Adult ♂ pink bollworms, Pectinophora gossypiella (Saunders) 2–3 days old, were irradiated with 13 or 6.5 krads of gamma rays and outcrossed to untreated females. The F 1 progeny were reared and paired with untreated moths. The effects on mating and sperm transfer by F 1 males were similar to those obtained in previous studies: F 1 males mated normally but often failed to inseminate females with eupyrene (nucleate) sperm. Also, 35% of the F 1 females (13 krad) mated with normal males failed to receive (or store) eupyrene sperm in their spermathecae. Histological studies of 8, 24, 48, or 96-h-old eggs deposited by inseminated F 1 females mated with untreated males or by untreated females mated with F 1 males showed that most eggs were fertilized and that embryonic development proceeded until a definitive postblastokinesis embryo was formed. For example, untreated females mated with F 1 males from the 13 krad test had an egg hatch of 15.4%, but 86% of the eggs had formed a segmented embryo at 48 h and 72% had formed a definitive embryo after 96 h of development. Similar trends were found in the eggs produced by F 1 females mated with untreated males. This suggests that most embryonic development can be completed without some of the genetic information contributed by the ♂ or ♀ gamete.
Published Version
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