Data/hora: 09/06/2024 17:55:23

Provedor de dados: 	Pesquisa Agropecuária Brasileira	
País: 	Brazil	
Título: 	Heterosis and genetic distance in intervarietal corn hybrids	
Autores: 	Baretta,Diego; Nardino,Maicon; Carvalho,Ivan Ricardo; Pelegrin,Alan Junior de; Ferrari,Mauricio; Oliveira,Victoria Freitas de; Szareski,Vinícius Jardel; Oliveira,Antonio Costa de; Barros,Willian Silva; Souza,Velci Queiróz de; Maia,Luciano Carlos da.	
Data: 	2019-01-01	
Ano: 	2019	
Palavras-chave: 	Zea mays; Genetic dissimilarity; Heterosis; Landraces; Topcross.	
Resumo: 	Abstract: The objective of this work was to evaluate the performance of intervarietal corn (Zea mays) hybrids with topcross crosses between landrace populations, and to confirm whether genetic dissimilarity between populations is correlated with the heterosis of the intervarietal hybrids in the field. Nine topcross hybrids were evaluated with their tester 'BRS Planalto', and the following landrace populations were used as parents: Argentino Branco, Dente de Ouro, Amarelão, Criolão, Caiano Rajado, Branco Oito Carreiras, Branco Roxo Índio, Cateto Branco, and Argentino Amarelo. The tester 'BRS Planalto' and the topcross hybrids Branco Oito Carreiras x 'BRS Planalto' and Criolão x 'BRS Planalto' showed higher per se potential for grain yield. The topcross hybrid Branco Oito Carreiras x 'BRS Planalto' showed a better performance for number of grains per row, grain weight, and ear diameter, whereas Criolão x 'BRS Planalto' displayed a better performance for the number of grains per row and ear length. Greater estimates of genetic distance did not necessarily result in greater heterosis values and were exclusively correlated with grain ear length. Therefore, it is not possible to predict the effects of high heterosis on grain yield, based on the genetic distance between the populations involved in the crosses.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102806	
Editor: 	Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira	
Relação: 	10.1590/s1678-3921.pab2019.v54.00265	
Formato: 	text/html	
Fonte: 	Pesquisa Agropecuária Brasileira  v.54 2019	
Fonte: 	info:eu-repo/semantics/openAccess