%0 Journal Article
%T Citogen¨¦tica de especies de Vasconcellea (Caricaceae)
%A Caetano
%A Creuc¨ª Maria
%A Lagos Burbano
%A T¨²lio C¨¦sar
%A Sandoval Sierra
%A Claudia Lorena
%A Posada Tique
%A C¨¦sar Augusto
%A Caetano Nunes
%A Diego Geraldo
%J Acta Agron¨®mica
%D 2008
%I Universidad Nacional de Colombia Sede Palmira
%X this work aims to know basic aspects of cytogenetics of mountain papayas' or 'papayuelas', vasconcellea species (caricaceae), originated from ecuador and colombia. flower buds were fixed in 3:1 acetic-alcohol solution for 24 hr, transferred to new solution and stored al low temperature. both microsporocytes and pollen grains were stained with 1% acetic carmine. meiosis phases and pollen viability were evaluated to describe chromosome behavior. we found that: 1) all tested species were diploid (2n=2x=18); 2) chromosome number of v. sphaerocarpa, v. longiflora and v. palandensis (2n=18) were by first time reported; 3) asymmetry level of chromosome complements indicated a evolution process in these species; 4) presence of numerous nor in v. sphaerocarpa associated to micronucleoli corroborated its possible hybrid origin; and 5) v. cauliflora (42.98%) and v. cundinamarcensis (47.93%) presented the low percentage of pollen viability.
%K mountain papaya
%K vasconcellea
%K meiotic behavior
%K pollen viability.
%U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0120-28122008000400004&lng=en&nrm=iso&tlng=en