Data/hora: 03/06/2024 05:46:04

Biblioteca(s): | Embrapa Agricultura Digital.
Data corrente: | 01/06/2009
Data da última atualização: | 30/11/2010
Autoria: | SILVA, F. F. da; PEREIRA, M. G.; DAMASCENO JÚNIOR, P. C.; DAHER, R. F.; PEREIRA, T. N. S.; SOUZA FILHO, G. A. de; VIANA, A. P.; FERREGUETTI, G. A.
Afiliação: | FRANCISCO FILHO DA SILVA, UENF; MESSIAS GONZAGA PEREIRA,, UENF; PEDRO CORRÊA DAMASCENO JÚNIOR, UENF; ROGÉRIO FIGUEIREDO DAHER, UENF; TELMA NAIR SANTANA PEREIRA, UENF; GONÇALO APOLINÁRIO DE SOUZA FILHO, UENF; ALEXANDRE PIO VIANA, UENF; GERALDO ANTÔNIO FERRUTTI, UENF.
Título: | Monitoring of the genetic variability in papaya parent 'Formosa' of 'UENF/CALIMAN 01' hybrid via RAPD
Ano de publicação: | 2007
Fonte/Imprenta: | Crop Breeding and Applied Biotechnology, Londrina, v. 7, n. 1, p. 36-42, June 2007.
Idioma: | Inglês

Conteúdo:

The genetic improvement of papaya in Brazil, in hybridizations and studies of combining ability, can broaden the genetic base of the species and brush aside the constraints in choosing cultivars for planting. The objective of this study was to monitor the advance of selfing generations in the parent Formosa of 'UENF/CALIMAN 01', the first Brazilian papaya hybrid, using RAPD markers. For this purpose 27, 30 and 31 plants of the C1, C2 and C 3 cycles, respectively, were genotyped. The coefficients of mean genetic dissimilarity were 0.1766, 0.0555 and 0.0445 in the C 1, C2 and C 3 cycles, respectively. The reduced mean distance in the C3 cycle indicates a greater genetic homogeneity of these plants, fulfilling a basic requirement for the creation of uniform hybrids. The establishment of the C4 cycle would therefore achieve no significant gains in reducing the
genetic distance but cause a delay in the release of hybrid seeds.

Palavras-Chave: | Índice de Jaccard; Mamoeiro; Mamoeiro formosa; Marcadores moleculares; Método de agrupamento de Tocher; Uenf/caliman 01; UPGMA.
Thesagro: | Agricultura; Biotecnologia; Carica Papaya; Genética.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Agricultura Digital (CNPTIA)
Exemplares: | CNPTIA - (13054-1) - ADD - AP - PP -  -  -  - DIS