Data/hora: 22/06/2024 13:41:49

Biblioteca(s): 	Embrapa Gado de Leite.	
Data corrente: 	10/02/2014	
Data da última atualização: 	05/02/2024	
Autoria: 	NUNES, J. D.; AZEVEDO, A. L. S.; PEREIRA, A. V.; PAULA, C. M. P.; CAMPOS, J. M. S.; LEDO, F. J. da S.; SANTOS, V. B.	
Afiliação: 	J. D. NUNES; ANA LUISA SOUSA AZEVEDO, CNPGL; ANTONIO VANDER PEREIRA, CNPGL; C.M.P. PAULA, UFLA; J. M. S. CAMPOS, UFJF; FRANCISCO JOSE DA SILVA LEDO, CNPGL; V. B. SANTOS, Universidade Federal do Acre.	
Título: 	DNA elimination in embryogenic development of Pennisetum glaucum x Pennisetum purpureum (Poaceae) hybrids.	
Ano de publicação: 	2013	
Fonte/Imprenta: 	Genetics and Molecular Research, v. 12, n. 4, p. 4817-4826, 2013.	
DOI: 	https://doi.org/10.4238/2013.october.22.1	
Idioma: 	Inglês	
Conteúdo: 	Interspecific hybridization between Napier grass (Pennisetum purpureum), which is widely grown in Brazil for cattle forage, and pearl millet (Pennisetum glaucum) has been used as a breeding strategy for the development of improved cultivars. However, the hybrid between these two species is sterile due to its triploid condition (2n = 3x = 21 chromosomes), which hinders its use in crop breeding programs. It is known that genomic alterations result from the hybridization process. In order to measure the loss of DNA during embryo development, we used flow cytometry to estimate the nuclear DNA content of triploid and tetraploid embryos produced by interspecific hybridization between Napier grass and pearl millet. The triploid and tetraploid hybrids had a mean DNA content of 4.99-4.87 and 5.25-4.84 pg, at 10 and 30 days after pollination, respectively. The mean reduction in DNA content was higher in the tetraploid hybrids. The flow cytometry results revealed progressive genomic instability in these triploid and tetraploid hybrids, with this instability causing significant alterations in the DNA content of the hybrids.	
Palavras-Chave: 	Elephant grass.	
Thesaurus Nal: 	flow cytometry; grasses; hybridization.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/96852/1/ARTIGO-Ledo.pdf	
Registro original: 	Embrapa Gado de Leite (CNPGL)	
Exemplares: 	CNPGL - (21097-1) - UPC - AP - DD -  -  -  - DIS