25 documents found, page 1 of 3
Genetic variability in maize and teosinte populations estimated by microsatelli...
Terra,Tatiana de Freitas; Wiethölter,Paula; Almeida,Cícero Carlos de Souza; Silva,Sérgio Delmar dos Anjos e; Bered,FernandaWild species are important sources of genetic variability and may be exploited by breeding programs. Crosses between teosinte and maize occur freely and teosinte serves as genetic source of agronomic traits for introduction in maize. The objective of this study was to estimate genetic variability among and within maize and teosinte populations (Zea mays mexicana). Two sweet maize populations (BR400 and BR402), ...
Genetic variability in populations of sweet corn, common corn and teosinte
Almeida,Cicero; Amorim,Edson Perito; Barbosa Neto,José Fernandes; Cardoso Filho,Julio Alves; Sereno,Maria Jane Cruz de MeloThe maize (Zea mays L. ssp. mays) has several related species, called teosinte, which are distributed in various subspecies of Zea and other genera. Among the different types of corn, sweet corn shows a great potential for human food. This type was originated from mutations, which increased the amount of polysaccharide in the endosperm. In Brazil there are populations of sweet corn, common maize and teosinte, h...
Seleção para tolerância ao alumínio em milho com base em parâmetros genéticos e...
Conceição,Léo Duc Haa Carson Schwartzhaupt da; Doerr,Larissa Macedo Winkler; Barbosa Neto,José FernandesO melhoramento de plantas, nos últimos 40 anos, tem empenhado esforços na busca de genótipos de milho com tolerância ao alumínio. A compreensão da variabilidade existente através da distância genética entre genótipos serve como base para definição de cruzamentos que possibilitem a obtenção de ganho genético. O objetivo deste trabalho foi estudar o caráter tolerância ao alumínio em milho com base em parâmetros g...
Phenotypic and molecular characterization of corn hybrids released from 1980 to...
Bispo,Noryam Bervian; Tessele,Carolina; Barbosa Neto,José FernandesGenetic variability is the basis of plant breeding. In corn, a large and diverse genetic pool permits manipulation of different genotypes, but the genetic diversity of tropical germplasm has been little studied. With the objective of analyzing the amplitude of the genetic variability in 15 hybrids released in different periods by three different seed companies, phenotypic and molecular characterization was carr...
Capacidade combinatória de genótipos de milho para tolerância ao encharcamento ...
Silva,Sérgio Delmar dos Anjos e; Sereno,Maria Jane Cruz de Melo; Silva,Cláudia Fernanda Lemons e; Barbosa Neto,José FernandesNo sul do Brasil, a cultura do milho pode ser uma alternativa de cultivo para áreas de várzea; entretanto, o desenvolvimento de genótipos tolerantes ao encharcamento é condição fundamental para viabilizar economicamente esta opção. O objetivo do presente trabalho foi determinar a capacidade geral e específica de combinação e os efeitos recíprocos para tolerância ao encharcamento do solo de genótipos de milho. A...
Plant traits to complement selection based on yield components in wheat
Okuyama,Lauro Akio; Federizzi,Luiz Carlos; Barbosa Neto,José FernandesThe aim of the present study was to investigate the relationship between plant traits and yield per spike in wheat genotypes. The measured plant traits were: length of flag leaf blade, peduncle extrusion, peduncle, spike and sheath, culm diameter and plant height. Data were analyzed with correlation and path coefficient analysis. Yield per spike correlated positively with spike length and culm diameter. Path co...
Grain yield stability of wheat genotypes under irrigated and non-irrigated cond...
Okuyama,Lauro Akio; Federizzi,Luiz Carlos; Barbosa Neto,José FernandesAnalyses of genotype by environment interactions were carried out for wheat genotypes grown under irrigated and non-irrigated field conditions, in two sowing dates during three years. The linear regression method was used to analyze the stability of grain yield. Genotype by environment interactions was observed for grain yield in all groups of environments. Nesser was the most productive and stable genotype in ...
Correlation and path analysis of yield and its components and plant traits in w...
Okuyama,Lauro Akio; Federizzi,Luiz Carlos; Barbosa Neto,José FernandesThis study was aimed to characterize yield components and plant traits related to grain yield. Correlation and path analysis were carried out in wheat genotypes grown under irrigated and non-irrigated field conditions. In the path coefficient analysis, grain yield represented the dependent variable and the number of spikes m-2, number of grains spike-1, kernel weight, days to anthesis, above-ground biomass m-2 ...
Caracterização genética de Euphorbia heterophylla resistente a herbicidas inibi...
Winkler,Larissa Macedo; Vidal,Ribas Antônio; Barbosa Neto,José FernandesO aumento do número de plantas daninhas resistentes aos herbicidas inibidores da enzima acetolactato sintase é um tema abordado com freqüência por produtores e comunidade científica. No Brasil, nove espécies já foram documentadas por apresentarem tal problema. O objetivo deste trabalho foi determinar a diversidade genética de populações de leiteira (Euphorbia heterophylla L.) resistentes aos herbicidas inibidor...
Combining ability of twelve maize populations
Vacaro,Elton; Barbosa Neto,José Fernandes; Pegoraro,Diego Girardi; Nuss,Claudio Natalino; Conceição,Leo Duc HaaGenetic progress depends on germplasm quality and breeding methods. Twelve maize populations and their crosses were evaluated to estimate combining ability and potential to be included as source populations in breeding programs. Plant height, point of insertion of the first ear, number of ears per plant, number of grains per ear, root and stalk lodging and grain yield were studied in two locations in Brazil, du...