SciELO - Scientific Electronic Library Online

 
vol.57 número4Genetic parameters of panicle lentgh in rice cropMorphologic characterization of 93 accesions of Capsicum spp of germoplasm bank of National University of Colombia - Palmira índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Em processo de indexaçãoCitado por Google
  • Não possue artigos similaresSimilares em SciELO
  • Em processo de indexaçãoSimilares em Google

Compartilhar


Acta Agronómica

versão impressa ISSN 0120-2812

Resumo

CAETANO, Creucí Maria et al. Cytogenetic of Vasconcellea species (Caricaceae). Acta Agron. [online]. 2008, vol.57, n.4, pp.241-245. ISSN 0120-2812.

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.

Palavras-chave : Mountain papaya; Vasconcellea; meiotic behavior; pollen viability.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons