Electron microscopic observations on the meiotic karyotype of diploid and tetraploid Saccharomyces cerevisiae. Export

@article{citeulike:3064913, abstract = {Certain strains of Saccharomyces cerevisiae contain visible segments of synaptonemal complex which are apparent components of bivalents in pachytene of meiotic prophase. The synaptonemal complex has the typical width in the frontal plane but is unusually thin in the sagittal plane, thus accounting for its poor visibility. Amorphous densities situated adjacent to the central element occur at intervals suggesting their coincidence with sites of crossing over. Reconstruction of the synaptonemal complex from serial sections has permitted karyotypic analysis. The number of segments of synaptonemal complex and the distribution of their legths is consistent with the genetic map. Two, possibly three, segments enter the nucleolus as if bearing sequences encoding ribosomal RNA. Reconstruction of tetraploid nuclei reveals an approximate doubling of the diploid chromosome number and confirms the pattern of nucleolar entry. Quadrivalent pairing is evident between the pairs of synaptonemal complex segments in the tetraploid nuclei.}, author = {Byers, B. and Goetsch, L.}, citeulike-article-id = {3064913}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/1108011}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=1108011}, issn = {0027-8424}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, keywords = {body, diploid, electron, meiosis, microscopy, pole, scerevisiae, spindle, tetraploid}, month = {December}, number = {12}, pages = {5056--5060}, posted-at = {2008-07-31 10:50:14}, priority = {2}, title = {Electron microscopic observations on the meiotic karyotype of diploid and tetraploid Saccharomyces cerevisiae.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/1108011}, volume = {72}, year = {1975} }

TY - JOUR ID - citeulike:3064913 L3 - citeulike-article-id:3064913 N2 - Certain strains of Saccharomyces cerevisiae contain visible segments of synaptonemal complex which are apparent components of bivalents in pachytene of meiotic prophase. The synaptonemal complex has the typical width in the frontal plane but is unusually thin in the sagittal plane, thus accounting for its poor visibility. Amorphous densities situated adjacent to the central element occur at intervals suggesting their coincidence with sites of crossing over. Reconstruction of the synaptonemal complex from serial sections has permitted karyotypic analysis. The number of segments of synaptonemal complex and the distribution of their legths is consistent with the genetic map. Two, possibly three, segments enter the nucleolus as if bearing sequences encoding ribosomal RNA. Reconstruction of tetraploid nuclei reveals an approximate doubling of the diploid chromosome number and confirms the pattern of nucleolar entry. Quadrivalent pairing is evident between the pairs of synaptonemal complex segments in the tetraploid nuclei. IS - 12 JF - Proceedings of the National Academy of Sciences of the United States of America SN - 0027-8424 EP - 5060 TI - Electron microscopic observations on the meiotic karyotype of diploid and tetraploid Saccharomyces cerevisiae. VL - 72 SP - 5056 KW - body KW - diploid KW - electron KW - meiosis KW - microscopy KW - pole KW - scerevisiae KW - spindle KW - tetraploid AU - Byers, B AU - Goetsch, L PY - 1975/12// UR - http://view.ncbi.nlm.nih.gov/pubmed/1108011 ER -