Research Article

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The growing demand for maize creates a challenge for breeders; they need to constantly develop higher yielding and higher quality genotypes. We estimated the most relevant genetic parameters, along with heterosis and variance components. A multivariate approach was used in order to define profiles of narrow sense heritability for yield and nutritional components in ... more

I.R. Carvalho; A.J. de Pelegrin; M. Ferrari; V.J. Szareski; T.C. da Rosa; V.F. de Oliveira; J.F. Hoffmann; M. Nardino; G.G. Conte; F.C. Chaves; V.Q. de Souza; A.C. de Oliveira; L.C. da Maia
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The soybean crop is undoubtedly important to not only Brazil but also for most parts of the globe, as economic and social dependency upon this crop becomes evident. However, the scenario of the soybean crop production has faced challenges with environmental changes, which have escalated the incidence of pests. Due to the abundance of stink bugs, especially ... more

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Augmented blocks; Breeding; strawberry

Strawberry (Fragaria x ananassa) stands out among small fruits as the most planted in Brazil, generating considerable income and employment. However, producers are dependent on cultivars originating from international breeding programs and imported seedlings. This entails high costs and plants poorly adapted to the edaphoclimatic conditions of Brazil. In ... more

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Cross-pollination and gametophytic self-incompatibility reduce the stability of Coffea canephora genotypes. This is an important crop for Brazil, the largest producer of this type of coffee and also a major exporter. The study of biometric characteristics is essential to assist in the selection of promising plant materials. We examined the diversity of ... more

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Breeding; Germplasm bank; Molecular marker; Morphological descriptors; Variability

Ornamental peppers have been attracting great commercial interest in recent years. However, despite the demand, the availability of ornamental pepper cultivars to growers and consumers is still reduced, which should stimulate breeding programs for improved varieties. In this context, the identification and characterization of accessions in ornamental pepper ... more

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broiler; Genetic correlation; Gibbs sampling; Heritability; Liver fat trait; Restricted maximum likelihood

Intensive selection of broilers for improved growth rate is known to exert a negative effect on broiler health, such as an increase in body fat (and its related diseases). Excessive fat deposition in the liver can cause fatty liver hemorrhagic syndrome (FLHS); in addition, traits associated with liver fat have also been associated with FLHS. This study explored the genetic relationships ... more

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Dairy cattle; Genetic correlation; Heritability; Random regression; Somatic cell count

Selection for lower somatic cell count has been included in the breeding objectives of several countries in order to increase resistance to mastitis. Genetic parameters of somatic cell scores (SCS) were estimated from the first lactation test day records of Brazilian Holstein cows using random-regression models with Legendre polynomials (LP) of the order 3-5. Data consisted of 87,711 TD ... more

C.N. Costa; G.G. Santos; J.A. Cobuci; G. Thompson; J.G.V. Carvalheira
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Selection among broilers for performance traits is resulting in locomotion problems and bone disorders, once skeletal structure is not strong enough to support body weight in broilers with high growth rates. In this study, genetic parameters were estimated for body weight at 42 days of age (BW42), and tibia traits (length, width, and weight) in a population of broiler chickens. ... more

B.N.N. Ragognetti; N.B. Stafuzza; T.C.S. Chud; N.V. Grupioni; V.A.R. Cruz; J.O. Peixoto; K. Nones; M.C. Ledur; D.P. Munari; T.B.R. Silva
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S. Ahmad; H.A. Sadaqat; M.H.N. Tahir; F.S. Awan

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