|
|
|
|
|
| Missio,Robson Fernando; Caixeta,Eveline Teixeira; Zambolim,Eunize Maciel; Pena,Guilherme Ferreira; Ribeiro,Ana Paula; Zambolim,Laércio; Pereira,Antônio Alves; Sakiyama,Ney Sussumu. |
| EST-SSR markers were used to investigate the genetic diversity among and within coffee populations, to explore the possibility of their use for fingerprinting of cultivars and to assist breeding programs. Seventeen markers, developed from ESTs (Expressed Sequence Tags) from the Brazilian Coffee Genome Project, were used. All markers showed polymorphism among the genotypes assessed. The average number of allele per primer was 5.1. The highest polymorphisms were found within C. canephora (88.2%) and rust-resistant varieties (35.3%). About 29.4% of the markers differentiated C. arabica from Híbrido de Timor; it was also possible to identify those closest and farthest from C. arabica . The analysis of population-grouped genotypes revealed a 64.0% genetic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DNA markers; Coffea sp.; UPGMA; Amova; Microsatellite markers. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052009000300003 |
| |
|
|
| Pena,Guilherme Ferreira; Amaral Júnior,Antonio Teixeira do; Gonçalves,Leandro Simões Azeredo; Vivas,Marcelo; Ribeiro,Rodrigo Moreira; Mafra,Gabrielle Sousa; Santos,Adriano dos; Scapim,Carlos Alberto. |
| ABSTRACT The use of topcross has proven to be an interesting option for the maize crop; however, for the popcorn, there is little information about the choice of the appropriate tester. In this context, this study aimed to analyze four testers including two open pollinated varieties(BRS Angela and UENF-14), one topcross hybrid (IAC125) and a line (P2), to evaluate the combining ability of 50 S3 families of popcorn, obtained from the UENF-14 variety. Popcorn families were evaluated for grain yield (GY) and popping expansion (PE). The estimates of general and specific combining abilities were obtained and the discrimination of each tester through differentiation index was carried out. The testers BRS Angela (for GY) and IAC 125 (for PE) were the most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays var. everta; Topcross; Yield; Popping expansion. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000200135 |
| |
|
|
| Freitas,Ismael Lourenço de Jesus; Amaral Junior,Antonio Teixeira do; Viana,Alexandre Pio; Pena,Guilherme Ferreira; Cabral,Pablo da Silva; Vittorazzi,Cássio; Silva,Thiago Rodrigues da Conceição. |
| O objetivo deste trabalho foi comparar quatro índices de seleção e o método REML/Blup na avaliação de ganhos genéticos preditos das características de interesse ao programa de melhoramento do milho-pipoca UENF 14. Foram avaliadas 200 progênies de irmãos-completos, em uma safra, em dois ambientes (regiões Norte e Noroeste do Estado do Rio de Janeiro), com duas repetições, o que totalizou 800 observações. Avaliaram-se as características altura média de plantas, altura média de inserção da primeira espiga, estande final, tombamento, diâmetro de colmo, prolificidade, rendimento e capacidade de expansão dos grãos. Entre os índices de seleção testados, o de Mulamba & Mock proporcionou os melhores resultados para a seleção das progênies de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Correlação genética; Modelos mistos; Seleção recorrente; Seleção simultânea. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013001100007 |
| |
|
|
| Kurosawa,Railan do Nascimento Ferreira; Vivas,Marcelo; Amaral,Antonio Teixeira do; Ribeiro,Rodrigo Moreira; Miranda,Samila Barbosa; Pena,Guilherme Ferreira; Leite,Jhean Torres; Mora,Freddy. |
| ABSTRACT Compared with the common corn, popcorn shows greater susceptibility to pests and diseases occurrence, being the use of resistant cultivars the most efficient strategy. In this regard, Germplasm Banks deserve special attention because they contain accessions that can be used as sources of resistance in breeding programs. The State University of Northern Rio de Janeiro (UENF) maintains a popcorn Germplasm Bank with accessions from tropical and temperate countries, including Diversity Centers for the species. In this study, we investigated the performance of 37 popcorn accessions landraces, hybrids, and inbreed lines ― from the Germplasm Collection of UENF’s Popcorn Breeding Program with respect to the fungal leaf diseases northern leaf blight (NLB)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Northern leaf blight; Genetic resistance; Plant breeding. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100036 |
| |
|
|
| Mafra,Gabrielle Sousa; Amaral Junior,Antonio Teixeira do; Vivas,Marcelo; Santos,Juliana Saltires dos; Silva,Fernando Higino de Lima e; Guimarães,Amanda Gonçalves; Pena,Guilherme Ferreira. |
| ABSTRACT The present study resulted from the lack of information on the genotypic expression ruling the resistance to rust and on the main traits of economic importance to the herein addressed crop. The combining ability of 16 popcorn lines and hybrids was assessed in partial diallel cross in two representative locations in Rio de Janeiro State, Brazil, where forty simple hybrids were obtained. The experiments followed a completely randomized block design with four repetitions and were conducted under natural infestation conditions in order to test the southern rust severity in the entire plant (SSW) and in the leaf of the first ear (SFPE), as well as the morpho-agronomic traits of greater interest: grain yield (GY) and popping expansion (PE). Additive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Circulant diallel; General and specific combining ability; Southern rust. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000400519 |
| |
|
|
|
