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Tetraploid Diœcious Melandrium
Nature, 1952IN 1942 I published a short note1 on a tetraploid plant of diœcious Melandrium found growing wild in Svalov in southern Sweden. The specimen in question was a female individual growing between the fields behind the place where the new laboratories of chemistry and cytology were erected later. Its flowers were red, as in M. diœcum ssp.
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Theoretical and Applied Genetics, 1986
First generation tetraploids were produced by hydrostatic pressure treatment before the first cleavage and raised until the adult stage. Their survival and growth were severely depressed when compared to the diploid control: after two years, no ovulated females were found although males produced sperm at 1 and 2 years of age and were mated individually
Chourrout, Daniel +5 more
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First generation tetraploids were produced by hydrostatic pressure treatment before the first cleavage and raised until the adult stage. Their survival and growth were severely depressed when compared to the diploid control: after two years, no ovulated females were found although males produced sperm at 1 and 2 years of age and were mated individually
Chourrout, Daniel +5 more
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PRENATAL DIAGNOSIS OF A TETRAPLOID FETUS
Prenatal Diagnosis, 1997A tetraploid fetus with an unusual facial appearance and multiple congenital anomalies (large cerebral lateral ventricles; lung, cardiac, and genital abnormalities) is reported. Chromosome analysis was performed on amniocytes and fetal blood lymphocytes. A comparison is made with other reported cases (nine liveborn infants and one 17.2-week-old fetus).
M, Teyssier, P, Gaucherand, A, Buenerd
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Development of cytochalasin B-induced tetraploid and diploid/tetraploid mosaic mouse embryos
Development, 1977ABSTRACTBy subjecting F1 (CBA × C57/BL) × A eggs at the time of 2nd cleavage to 10 μg/ml of cytochalasin B (CB), tetraploidy was produced in 52 % of 2-cell eggs and 35 % of 3-cell eggs. 2n/4n mosaic embryos were produced from 2-, 3- and 4-cell eggs and amounted to 20 % of all treated eggs.
Tarkowski, A K, Witkowska, A, Opas, J
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Nature, 1936
A RECENT communication1 has suggested that among Hymenoptera Symphyta males may be diploid, females tetraploid. It was further suggested that this characteristic might help to explain the phenomena of pre-conjugation as seen in Apis and Cynips kollari.
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A RECENT communication1 has suggested that among Hymenoptera Symphyta males may be diploid, females tetraploid. It was further suggested that this characteristic might help to explain the phenomena of pre-conjugation as seen in Apis and Cynips kollari.
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Scientia Horticulturae, 2007
This paper describes an efficient colchicine-mediated technique for the in vitro induction of tetraploids in Astragalus membranaceus and its confirmation by flow cytometry. Buds immersed in 0.2% colchicine solution for 36 h prior to culture induced as high as 35.3% tetraploid plants. Colchicine-induced tetraploids remained stable after 6 months in soil.
Lan-Lan Chen, Shan-Lin Gao
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This paper describes an efficient colchicine-mediated technique for the in vitro induction of tetraploids in Astragalus membranaceus and its confirmation by flow cytometry. Buds immersed in 0.2% colchicine solution for 36 h prior to culture induced as high as 35.3% tetraploid plants. Colchicine-induced tetraploids remained stable after 6 months in soil.
Lan-Lan Chen, Shan-Lin Gao
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TRIPLOID AND TETRAPLOID HYBRIDS FROM DIPLOID X TETRAPLOID CROSSES IN GRINDELIA (COMPOSITAE)
American Journal of Botany, 1970Crosses between the diploids G. oxylepis var. eligulata Steyermark (Mexico) and G. havardii Steyermark (New Mexico) and the tetraploid G. aphanactis Rydb.
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Production of Tetraploid Embryos
Cold Spring Harbor Protocols, 2006Andras, Nagy +3 more
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