High Chromosome Number and Giant Postreductional Sex Chromosomes in the Beetle Walterianella venusta Schaufuss (Chrysomelidae, Alticinae)
Título en español.
| dc.creator | ||
| dc.date | 1963-07-01 | |
| dc.identifier | https://revistas.upr.edu/index.php/jaupr/article/view/12947 | |
| dc.identifier | 10.46429/jaupr.v47i3.12947 | |
| dc.description | A high chromosome number for a coleopteran, 22-J-X+y, was encountered in an alticine, Walterianella venusta Schaufuss. The autosomes are very short, metacentric; the sex chromosomes very long and also metacentric. The sex chromosomes are desynaptic and postreductional in spermatogenesis. It is assumed that two trends operate in the evolution of the alticine chromosomes, first, the autosomal chromatin being incorporated repeatedly in the sex chromosomes, and second, the occurrence of the multiplication of the short autosomes. | en-US |
| dc.description | Se encontró un número alto de cromosomas (22+X+y) para un coleóptero; esto fue en un alticino, Walterianella venusta Schaufuss. Los autosomas son muy cortos y metacéntricos y los cromosomas del sexo muy largos y también metacéntricos. En la espermatogénesis, los cromosomas del sexo son desinápticos y postreduccionales. Se supone que en la evolución de los cromosomas de los alticinos operan dos tendencias; primeramente, la cromatina autosomal se incorpora repetidamente en los cromosomas del sexo, luego, los autosomas cortos se multiplican. | es-ES |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | University of Puerto Rico Mayagüez Campus Agricultural Experiment Station | en-US |
| dc.relation | https://revistas.upr.edu/index.php/jaupr/article/view/12947/10678 | |
| dc.rights | Derechos de autor 2018 Journal of Agriculture of the University of Puerto Rico. (Etapa III) | es-ES |
| dc.source | The Journal of Agriculture of the University of Puerto Rico; Vol. 47 No. 3 (1963): Vol. 47, No. 3, July 1963; 154-163 | en-US |
| dc.source | Journal of Agriculture of the University of Puerto Rico; Vol. 47 Núm. 3 (1963): Vol. 47, No. 3, July 1963; 154-163 | es-ES |
| dc.source | 2308-1759 | |
| dc.source | 0041-994X | |
| dc.source | 10.46429/jaupr.v47i3 | |
| dc.subject | Genetics | en-US |
| dc.subject | Sex chromosome abnormalities | en-US |
| dc.title | High Chromosome Number and Giant Postreductional Sex Chromosomes in the Beetle Walterianella venusta Schaufuss (Chrysomelidae, Alticinae) | en-US |
| dc.title | Título en español. | es-ES |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion |