Cytogenetics of the South American akodont rodents (Cricetidae). IV. Interspecific crosses between Akodon dolores × Akodon molinae

✍ Scribed by Merani, Susana ;Lizarralde, Martha ;Oliveira, Daniel ;Bianchi, Nestor

• Publisher: John Wiley and Sons
• Year: 1978
• Tongue: English
• Weight: 228 KB
• Volume: 206
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1402060305

✦ Synopsis

Abstract

Interspecific hybridization of Akodon molinae × Akodon dolores was obtained by crossing animals from our laboratory breeding colony. Sixteen pregnant females which produced a total of 86 Akodon hybrids were obtained from a total of 40 matings. The sex ratio in the hybrids was 2.58 males for each female. No clear explanation for this abnormal ratio can at the present time be given; however it cannot be ascribed to a phenomenon of intrauterine selection between sexes. The presence of natural hybrids has not been detected; therefore, the appearance of Akodon molinae × Akodon dolores hybrids is up to this moment a laboratory phenomenon.