Gynogenesis Promoted by Irradiated Sperms in Ascidians
نویسندگان
چکیده
منابع مشابه
Induction of gynogenesis in muskellunge with irradiated sperm of yellow perch proves diploid muskellunge male homogamety.
Diploid gynogenesis was induced in muskellunge Esox masquinongy using UV-irradiated muskellunge sperm as the first step in producing monosex females. In this approach, we have to rely on negative controls as an indirect reference for sperm genetic material destruction. In the first experiment, equal proportions of gynogenetic females and males were produced. Negative controls, UV-irradiated spe...
متن کاملThermal induction of diploid gynogenesis
Sporadic diploid gynogenetic fry resulted from fertilization with y-irradiated sperm. Their frequency increased appreciably when thermal shock treatments, beginning during the first hour of development (―0.4 OC lasting 6 hrs 45 min ; 26-30 °C lasting 10 min), were used. When the eggs were fertilized with normal sperm, a good triploidization rate was induced by means of heat shocks (27-30...
متن کاملExperiments on Mutations Induced by Neutrons in Drosophila Melanogaster Sperms.
WO somewhat puzzling phenomena have been reported in the literature T on neutron-induced lethals in Drosophila. NAGAI and LOCHER (1938), in the first work on this subject, kept the offspring of different neutron-treated males separate during the tests for sex-linked lethals and reported that the lethals were not distributed a t random among the offspring of different males. Two or more lethals ...
متن کاملThe Evolutionary Ecology of Gynogenesis
■ Abstract Most metazoans engage in recombination every generation. In theory this is associated with considerable cost, such as the production of males, so that asexual organisms, which do not pay this cost, should be able to invade populations of sexuals. Some asexuals depend on sperm of sexual males to trigger embryogenesis, a reproductive mode called gynogenesis. The genetic information of ...
متن کاملThe rates of premature chromosome condensation and embryo development after injection of irradiated sperms into hamster oocytes
BACKGROUND Irradiation is one of the major causes of induced sperm DNA damage. Various studies suggested a relation between sperm DNA damage and fertilization rate after intra-cytoplasmic sperm injection (ICSI). OBJECTIVE In this study, fertilization rate and premature chromosome condensation (PCC) formation after ICSI of hamster oocytes with irradiated sperms from normal and oligosperm indiv...
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ژورنال
عنوان ژورنال: Bolletino di zoologia
سال: 1972
ISSN: 0373-4137
DOI: 10.1080/11250007209432045