Data/hora: 21/06/2024 13:32:15

Biblioteca(s): 	Embrapa Mandioca e Fruticultura.	
Data corrente: 	08/02/2017	
Data da última atualização: 	22/03/2017	
Autoria: 	JESUS, O. N. de; SOARES, T. L.; OLIVEIRA, E. J. de; SANTOS, T. C. P.; FARIAS, D. H.; BRUCKNER, C. H.; NOVAES, Q. S.	
Afiliação: 	ONILDO NUNES DE JESUS, CNPMF; T. L. SOARES; EDER JORGE DE OLIVEIRA, CNPMF; T. C. P. SANTOS; D. H. FARIAS; C. H. BRUCKNER; Q. S. NOVAES.	
Título: 	Dissimilarity based on morphological characterization and evaluation of pollen viability and in vitro germination in Passiflora hybrids and backcrosses.	
Ano de publicação: 	2016	
Fonte/Imprenta: 	Acta Horticulturae, 1127, 2016	
Série: 	0567-7572	
Idioma: 	Inglês	
Notas: 	XXIX International Horticultural Congress on Horticulture: Sustaining Lives, Livelihoods and Landscapes (IHC2014): International Symposium on Plant Breeding in Horticulture	
Conteúdo: 	Brazil is considered the main center of the genetic diversity and greatest worldwide producer of passion fruit. Passionfruit woodiness virus (Cowpea aphid born mosaic virus) is an important pathogenic agent of the passion fruit crop, causing severe losses in yield. Wild species of Passiflora are valuable sources of genetic resistance to this disease. Interspecific crosses are a promising method to incorporate resistance genes in commercial species (Passiflora edulis Sims.), despite problems with male sterility in developed hybrids. The objective of the present work was to study the dissimilarity based on morphological characteristics, and the viability and in vitro germination of pollen grains of progenitors, F1 hybrids, as well as progenies of the first generation of backcross BC1 [(P. edulis × P. cincinnata) × P. edulis]. Analysis of the severity of the viral disease showed that most genotypes were considered as susceptible to highly susceptible. The resistant hybrids did not show symptoms of foliar deformation. Cluster analysis showed two major groups; one represented by P. cincinnata and the second group by the hybrids and recurrent progenitor P. edulis. Morphological characterization of the hybrids showed phenotypic variation as to the color and shape of flowers, although the descriptors used were not able to show these differences. As expected, the progenitors (P. edulis and P. cincinnata) presented higher percentages of pollen viability, followed by the BC1-H45 progenies. The progenies of the BC1 will also be evaluated in the future with molecular markers aiming to accelerate the selection of hybrids with higher percentages of the genome of the recurrent parent.	
Palavras-Chave: 	Passionfruit.	
Thesagro: 	Maracujá.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Mandioca e Fruticultura (CNPMF)	
Exemplares: 	CNPMF - (31885-1) - UPC - AA - DD - Publicação digital -  -  - DIS