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61 recherche sur le mot-clé
'REPRODUCTION ASEXUEE' 
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K. Shufran ; D. Peters ; J. Webster | 1997In the United States, the greenbug, Schizaphis graminum (Rondani), reproduces primarily by apomictic parthenogenesis. Although a periodic sexual cycle exists, the extent to which it occurs naturally and its influence on the genetic variability o[...]
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J. Simon ; E. Carrel ; P. Hebert ; C. Dedryver ; J. Bonhomme ; J. Le Gallic | 1996
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J. Kenten | 1955
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J. Simon ; C. Rispe ; P. Sunnucks | 2002Many theories attempt to explain why sexual reproduction has invaded life so thoroughly. Some are plausible, but there remains a need for evolutionary biologists to identify the main factor(s) accounting for the maintenance of sex in diverse, re[...]
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N. Humphreys ; A. Douglas | 1997The population of symbiotic Buchnera bacteria in parthenogenetic females of the yea aphid Acyrthosiphon pisum mas determined by quantitative hybridization of a DNA probe (gro ESL) to aphid homogenates. The aphids bore 1 x 10(7) to 2 x 10(7) bact[...]
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G. Froehlich ; S. Richter | 1987
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