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Observations On the Effect of Males On Reproduction and Fecundity of Aphelenchus Avenae

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For more content, see Nematology.

Males of an amphimictic population of Aphelenchus avenae copulated many times with females from the same population and remained potent for up to 5 weeks at 27°C. Egg production followed a skewed normal distribution. Delayed mating reduced the number of eggs laid. The fecundity of females from a parthenogenetic population was reduced in proportion to the number of males introduced from an amphimictic population. This reduction in fecundity was also demonstrated in the reduced rate of multiplication of parthenogenetic populations; no males were produced in the progeny. Egg laying of amphimictic females in response to different numbers of males was inconsistent but during the multiplication of populations, more nematodes were present after one week with higher, initial numbers of males.

Affiliations: 1: Department of Plant Pathology, Waite Agricultural Research Institute, Glen Osmond, South Australia 5064


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