Results 121 to 130 of about 10,215 (166)
Some of the next articles are maybe not open access.
Diploid and triploid offspring of triploid agamosporous fernDryopteris pacifica
The Botanical Magazine Tokyo, 1992A cytological and reproductive study of the diploid and triploid agamosporousDryopteris pacifica was made to elucidate the origin of its infraspecific cytotypes. Some triploids produced 16 spore mother cells (SMCs) sometimes with n=41II+41I chromosomes, in addition to eight SMCs with n=123II, in each sporangium.
Su-Juan Lin +2 more
openaire +1 more source
Chromosoma, 2008
Triploidy has generally been considered to be an evolutionary dead end due to problems of chromosomal pairing and segregation during meiosis. Thus, the formation of tetraploids and diploids from triploid types is a rare phenomenon. In the present study, we demonstrated that inbreeding of the triploid planarian Dugesia ryukyuensis resulted in both ...
Kazuya, Kobayashi +5 more
openaire +2 more sources
Triploidy has generally been considered to be an evolutionary dead end due to problems of chromosomal pairing and segregation during meiosis. Thus, the formation of tetraploids and diploids from triploid types is a rare phenomenon. In the present study, we demonstrated that inbreeding of the triploid planarian Dugesia ryukyuensis resulted in both ...
Kazuya, Kobayashi +5 more
openaire +2 more sources
Advanced Triploid Pregnancy and Preeclampsia
Southern Medical Journal, 1995Triploidy, though unusual in advanced gestations, may be associated with preeclampsia. The increase in paternal genetic material associated with the triploid diandric placenta may support the role of immunologic factors in the development of preeclampsia.
K A, Sorem, D M, Shah
openaire +2 more sources
Cytogenetic and Genome Research, 1963
The presence of Barr bodies was investigated in cells of a fibroblast culture, which consisted mainly of diploid cells with two X-chromosomes and triploid cells with three X-chromosomes in approximately equal numbers. Out of a total of 1000 cells, 487 cells contained a single Barr body and 64 contained two Barr bodies.
U, MITTWOCH, N B, ATKIN, J R, ELLIS
openaire +2 more sources
The presence of Barr bodies was investigated in cells of a fibroblast culture, which consisted mainly of diploid cells with two X-chromosomes and triploid cells with three X-chromosomes in approximately equal numbers. Out of a total of 1000 cells, 487 cells contained a single Barr body and 64 contained two Barr bodies.
U, MITTWOCH, N B, ATKIN, J R, ELLIS
openaire +2 more sources
Triploid Grass Carp: Triploid Induction, Sterility, Reversion, and Certification
North American Journal of Fisheries Management, 2011Abstract Nonnative grass carp Ctenopharyngodon idella have been used in the United States to control aquatic plants for approximately 42 years and are widely dispersed across 45 states, with reproduction occurring in 7 Mississippi River basin states.
Paul Zajicek +2 more
openaire +1 more source
Human Genetics, 1977
A cytogenetic and anatomopathologic study of an embryo of 24 mm crown-rump length showing pure triploidy (69,XXY) is reported. Anomalies such as unilateral genitourinary agenesia, aortic alterations, defects in cerebral development, and anomalies of the chorionic villi were detected.
J, del Mazo +2 more
openaire +2 more sources
A cytogenetic and anatomopathologic study of an embryo of 24 mm crown-rump length showing pure triploidy (69,XXY) is reported. Anomalies such as unilateral genitourinary agenesia, aortic alterations, defects in cerebral development, and anomalies of the chorionic villi were detected.
J, del Mazo +2 more
openaire +2 more sources
Identification of Triploid Genome by Fluorescence Microscopy
Science, 1972Fluorescence markers on chromosome numbers 3, 13, and 14 gave cytological evidence of the paternal origin of the extra haploid set in a premature triploid infant with XXY sex chromosome complement. The mother had discontinued the use of oral contraceptives 13 months prior to conception.
I A, Uchida, C C, Lin
openaire +2 more sources
Studies on a triploid, a tetrasomic triploid and a trisomic plant of Dactylis glomerata
Chromosoma, 19641. From 4 n×2 n and reciprocal crosses within Dactylis glomerata subsp. lusitanica and D.g. subsp. smithii and between these two subspecies, two triploids, two polyhaploids and a 3n+1 plant were obtained. The two subspecies differ considerably as regards the extent of crossability with respect to intrasubspecific 2n×4n and recriprocal crosses.
openaire +1 more source
Isolation of Triploid Saccharomyces cerevisiæ
Nature, 1952THE production of tetraploids in a brewery yeast has been reported by Subramaniam and Krishna Murthy1 and Mitra and Subramaniam2, following treatment with acenaphthene and chrysene. These authors did not present genetic evidence to support their claim, which was based mainly on colony and other gross observations. Cytological evidence has recently been
openaire +2 more sources
The Journal of Experimental Zoology, 1998
The triploid (diploid × tetraploid) loach Misgurnus anguillicaudatus lays large, triploid eggs and small, haploid eggs simultaneously. We conducted cytogenetic examination of gonadal cells to determine the mechanisms responsible for this unusual oogenesis.
Quanqi Zhang +2 more
openaire +1 more source
The triploid (diploid × tetraploid) loach Misgurnus anguillicaudatus lays large, triploid eggs and small, haploid eggs simultaneously. We conducted cytogenetic examination of gonadal cells to determine the mechanisms responsible for this unusual oogenesis.
Quanqi Zhang +2 more
openaire +1 more source