O endosperma de café como material para estudos citológicos
The endosperm tissue of the coffee seed was used successfully for chromosomes countings, acetic orcein technique having proved satisfactorially to stain the well spread metaphasic and prophasic chromosomes. Endosperms with 62, 64, 66 and 68 chromosomes occur in the monosomic plants of C. arabica (n=43) while only endosperms with 3n=66 are formed in the typica variety (2n=44). Polyploid cells with 128 and 132 chromosomes were also observed and this occurrence was probably the result of endomitossis. Direct observation of endosperm chromosomes gives the real cytological constitution of fertile gametes, the probable chromosome numbers of the progeny being inferred in advance
Saved in:
Main Author: | 92745 Medina, D.M. |
---|---|
Format: | biblioteca |
Published: |
Jun
|
Subjects: | COFFEA ARABICA, ENDOSPERMA, NUMERO DE CROMOSOMAS, FRUTO, CITOLOGIA, TIPICA, |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Novas observaçoes citológicas no endosperma de café
by: 92745 Medina, D.M.
Published: (Ago ) -
Observaçoes citológicas em Coffea, 6: Desenvolvimento do embriao e do endosperma em Coffea arabica L
by: 93326 Mendes, A.J.T.
Published: (Abr ) -
O endosperma como material para obtençao de bandas CEG em chromossomos de o genero Coffea L. 221
by: 60190 Cruz, N.D. da, et al.
Published: ([sf]) -
Hibridaçoes entre Coffea arabica e C. Kapakata; análise citológica de um híbrido triplóide
by: 95110 Monaco, L.C., et al.
Published: (Mar ) -
L'hybridation interspecifique entre Coffea arabica L. et Coffea canephora Pierre. Obtention et comparaison des hybrides triploides Arabusta et hexaploides
by: Berthaud, Julien, autor 48601
Published: (1978)