101 documents found, page 1 of 11
Maize topcrosses for yield performance by additive main effects and multiplicat...
Rosa,Jocimar Costa; Scapim,Carlos Alberto; Faria,Marcos Ventura; Uhdre,Renan Santos; Zaluski,Welton Luiz; Sagae,Vitor SeitiABSTRACT: The analysis of main additive effects and multiplicative interaction is commonly used in the evaluation of the genotype x environment interaction, however, its application can be used for other purposes, as it is performed in the presentresearch, which uses this technique in the selection of inbred lines, testers and hybrids in maize topcrosses. Thisresearch determined the effect of the inbred lines x...
Genetic diversity and diallel analysis of elite popcorn lines
Castro,Camila Rodrigues; Gonçalves,Leandro Simões Azeredo; Pinto,Ronald Barth; Scapim,Carlos Alberto; Baba,Viviane Yumi; Zeffa,Douglas MarianiABSTRACT Popcorn is an important agricultural crop that is consumed as a snack food worldwide. In Brazil, the lack of cultivars with high potential grain yield and popping expansion volume is a vital problem. Therefore, the present study aimed to evaluate the genetic divergence among elite popcorn lines using amplified fragment length polymorphism (AFLP) markers to estimate the general and specific combining ab...
Identification of haploids and diploids in maize using seedling traits and flow...
Baleroni,Alessandra Guedes; Ré,Fabrícia; Pelozo,Andressa; Kamphorst,Samuel Henrique; Carneiro,José Walter Pedroza; Rossi,Robson MarceloAbstract: The seedling traits is a simple and non-destructive methodology used to identify haploids/diploids in maize. This study aimed at establishing an optimal germination temperature to evaluate this methodology and verify its effectiveness. Haploid and diploid seeds, obtained from crosses with the haploidy inducer TAIL9, were classified using the R1-Navajo marker and placed to germinated in growth chambers...
Combining abilities analysis for ear rot resistance in popcorn hybrids development
Almeida,Rafael Nunes de; Vivas,Marcelo; Santos Junior,Divino Rosa dos; Saluci,Júlio Cesar Gradice; Carlos,Mayara Cazadini; Santos,Juliana SaltiresABSTRACT Ear rot caused by fungi of genus Fusarium (FER) is one of the potentially harmful diseases to grain quality in maize. Given the capacity to produce mycotoxins, FER presents a risk to food safety. This study sought to identify parents and indicate hybrids of popcorn with a higher level of resistance to the incidence and severity of FER. Hybrids were produced from the crossing of 15 lines in S7 generatio...
Testers in supersweet corn lines
Nihei,Thiago Hideyo; Bertagna,Filipe Augusto Bengosi; Kuki,Maurício Carlos; Scapim,Carlos Alberto; Pinto,Ronald José BarthABSTRACT: The purpose of this study was to evaluate the discriminatory capacity of tester lines for tropical corn lines converted to supersweet shrunken (sh2) gene, for the development of hybrids adapted to tropical conditions. Lines were used as female parents in crosses with three testers: open-pollinated mixed variety; supersweet line L4; supersweet commercial hybrid Tropical Plus. Four trials were carried o...
Corn genotypes and crop seasons on the rate of putative haploids with the expre...
Silva,Hingrid Ariane da; Scapim,Carlos Alberto; Vivas,Marcelo; Amaral Júnior,Antonio Teixeira; Pinto,Ronald José Barth; Vivas,Janieli Maganha SilvaAbstract: The objective of this work was to evaluate the influences of the factors corn (Zea mays) genotypes, crop seasons, endosperm texture, genetic background, and genetic basis on putative haploid rates (PHRs) according to the expression of gene R1-navajo (R1-nj). Forty-one corn genotypes were evaluated as pollen receptors, in crosses with the Krasnodar haploid inducer, in two crops (summer and winter), in ...
Diallel analysis of popcorn populations for yield, popping expansion and resist...
Peterlini,Edicarlos; Pinto,Ronald José Barth; Scapim,Carlos Alberto; Rizzardi,Diego Ary; Bertagna,Filipe Augusto BengosiABSTRACT The objective of this study was to estimate the varietal and heterotic effects related to grain yield, popping expansion and resistance of popcorn against fall armyworm. Twelve open-pollinated varieties were intercrossed in a complete diallel mating scheme. The 66 experimental hybrids, together with their parents and controls Zapalote Chico, BRS 1030 and IAC 125, resulted in a total of 81 treatments, e...
Agronomic performance and sweet corn quality as a function of inoculant doses (...
Numoto,Alberto Yuji; Vidigal Filho,Pedro Soares; Scapim,Carlos Alberto; Franco,Antônio Augusto Nogueira; Ortiz,Alex Henrique Tiene; Marques,Odair JoséABSTRACT The inoculation of sweet corn seeds with Azospirillum brasilense in association to nitrogen fertilizer may be an agronomic alternative for increasing the crop yield and net income of plant growers. Therefore, the aim of this study was to investigate the effect of the different doses of inoculant (Azospirillum brasilense) associated to the nitrogen fertilization management on the phenotypic traits of on...
Multivariate analysis reveals key traits of fall armyworm resistance in tropica...
Sanches,Rafael Egea; Suzukawa,Andréia Kazumi; Contreras-Soto,Rodrigo Iván; Rizzardi,Diego Ary; Kuki,Mauricio Carlos; Zeffa,Douglas MarianiABSTRACT In the present study it is hypothesized that the germplasm of popcorn of tropical regions shows resistance to FAW, and the multivariate analysis can characterize the main traits of this resistance. Thus, the aim of this study was to identify key traits used to select fall armyworm resistance in popcorn by using factor and cluster analyses. Sixteen biological traits were evaluated at larval and pupae st...
Genetic diversity, population structure and AFLP markers associated with maize ...
Giordani,Willian; Scapim,Carlos Alberto; Ruas,Paulo Maurício; Ruas,Claudete de Fátima; Contreras-Soto,Rodrigo; Coan,MarlonABSTRACT Maize is one of the species with greater genetic diversity among cereals and possibly the most diverse crop species known. Accessing this variability is essential for maize breeding, allowing breeders to achieve progress of yield increasing, overcome environmental challenges or deal with pests and diseases. Among the maize diseases, southern rust is one of the most important, causing significant losses...