Studies of Sex Allocation in Birds and Molecular Tools for Sex Identification
نویسندگان
چکیده
منابع مشابه
Molecular Techniques for Sex Identification in Birds
In many bird species, males and females cannot be discriminated on the basis of external characteristics. The problems associated with reliable sex identification were overcome by introducing the molecular techniques in the 1990s. These techniques are generally based on DNA hybridization or polymerase chain reaction (PCR). This paper reviews the sexing techniques, highlighting their advantages ...
متن کاملSex Allocation Theory for Birds and Mammals
Parents divide their reproductive effort into the production of sons and daughters. Darwin (43) was intrigued by the fact that parents usually split their effort so that approximately equal numbers of sons and daughters are raised. He believed that this male : female ratio had been adjusted by natural selection because he understood that the number of females set a limit on reproductive capacit...
متن کاملPrimary sex ratios in birds: problems with molecular sex identification of undeveloped eggs.
Sex allocation studies seek to ascertain whether mothers manipulate offspring sex ratio prior to ovulation. To do so, DNA for molecular sexing should be collected as soon after conception as possible, but instead neonates are usually sampled. Here, we aim to identify and quantify some of the problems associated with using molecular techniques to identify the sex of newly laid avian eggs. From b...
متن کاملMeiotic drive and sex determination: molecular and cytological mechanisms of sex ratio adjustment in birds
Differences in relative fitness of male and female offspring across ecological and social environments should favour the evolution of sex-determining mechanisms that enable adjustment of brood sex ratio to the context of breeding. Despite the expectation that genetic sex determination should not produce consistent bias in primary sex ratios, extensive and adaptive modifications of offspring sex...
متن کاملReview. Meiotic drive and sex determination: molecular and cytological mechanisms of sex ratio adjustment in birds.
Differences in relative fitness of male and female offspring across ecological and social environments should favour the evolution of sex-determining mechanisms that enable adjustment of brood sex ratio to the context of breeding. Despite the expectation that genetic sex determination should not produce consistent bias in primary sex ratios, extensive and adaptive modifications of offspring sex...
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ژورنال
عنوان ژورنال: Japanese Journal of Ornithology
سال: 1999
ISSN: 0913-400X
DOI: 10.3838/jjo.48.83