Cytological basis of sex determination in higher plants
نویسندگان
چکیده
منابع مشابه
Sex determination in plants.
Sex determination is an important developmental event in the life cycle of all sexually reproducing plants. Recent studies of sex determination in many plant species, from ferns to maize, have been fruitful in identifying the diversity of genetic and epigenetic factors that are involved in determining the sex of the flower or individual. In those species amenable to genetic analysis, significan...
متن کاملSex determination in flowering plants.
In many ways, plants offer unique systems through which to study sex determination. Because the production of unisexual flowers has evolved independently in many plant species, different and novel mechanisms may be operational. Hence, there is probably not one unifying mechanism that explains sex determination in plants. Advances in our understanding of sex determination will come from the anal...
متن کاملMolecular basis of sex determination in haplodiploids.
Sex in many species of Hymenoptera (ants, bees and wasps) is determined by a single locus that is heterozygous in females and hemizygous in (haploid) males. Beye and colleagues have now cloned the csd locus in the honeybee Apis mellifera and provide functional evidence that this gene is the primary switch in the sex-determination cascade of honeybees and possibly all Hymenoptera.
متن کاملCytological study of amniotic fluid for prenatal sex determination.
A method for determining fetal sex by identification of Barr-Body in amniotic fluid by staining with aceto-orcein 120 patients pregnant for 20-40 weeks (Group 1) and 50 patients pregnant for 14-20 weeks (Group 2). The results were confirmed at birth or abortion. The accuracy of fetal sex diagnosis was 98.33% in Group 1 and 100% in Group 2. The method is extremely rapid, requiring no more tha...
متن کاملSex Determination in Monoecious and Dioecious Plants.
Angiosperm species that produce unisexual flowers present the opportunity for separate analysis of the male and female programs for floral differentiation and gametogenesis. A vast literature describes the genetic and physiological basis of sex determination in these species. (For reviews, see Westergaard, 1958; Grant, 1975; Frankel and Galun, 1977; Durand and Durand, 1984.) Recently, it has be...
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ژورنال
عنوان ژورنال: The Japanese Journal of Genetics
سال: 1950
ISSN: 0021-504X,1880-5787
DOI: 10.1266/jjg.25.211