Research Article

Related GMR Articles

03/29/2007
CEIP; Frame scores; Genetic and phenotypic correlation; Genetic improvement; Nellore; Weight

The present study was carried out to estimate both (co)variance components and genetic parameters for frame scores obtained using two methods (FRAME_GMA and FRAME_BIF) as well as phenotypic and genetic correlations with traits such as weaning weight, weight gain from weaning to yearling, scrotal circumference, muscle score, and an empiric index for animal classification for the Special ... more

A.R.V.R. Horimoto; J.B.S. Ferraz; J.C.C. Balieiro; J.P. Eler
12/12/2006
Body structure; Frame scores; Genetic improvement; Genetic parameters; Nellore

Models for estimation of frame scores in Nellore beef cattle (FRAME_GMA) were developed, comparing them with frame scores estimated using equations proposed by the Beef Improvement Federation (FRAME_BIF, USA). Correlation among frame scores obtained by these two methodologies, along with the independent variables considered in the estimation models, were also studied. A data set with 12,728 ... more

A.R.V.R. Horimoto; J.B.S. Ferraz; J.C.C. Balieiro; J.P. Eler
08/11/2009
Allelic interactions; diallel analysis; Epistasis; Genetic improvement; Heterozygosity; Over-dominance

Isabgol is a medicinal plant known for its high-quality dietary fiber. The genetics and inheritance of economic characters, such as number of panicles, panicle length, seed yield, and swelling factor, were measured by diallel analysis of F1 progenies from seven parents. The additive component of genetic variance was significant for days to flowering, plant height, branches/plant, peduncle ... more

N. Singh; R.K. Lal
09/06/2011
Artificial insemination; Dairy cows; Genetic improvement; Progeny testing; semen

Artificial insemination has been used to improve production in Brazilian dairy cattle; however, this can lead to problems due to increased inbreeding. To evaluate the effect of the magnitude of inbreeding coefficients on predicted transmitting abilities (PTAs) for milk traits of Holstein and Jersey breeds, data on 392 Holstein and 92 Jersey sires used in Brazil were tabulated. The second- ... more

M.P. Soares; L.G. Gaya; L.H. Lorentz; F. Batistel; G.A. Rovadoscki; E. Ticiani; V. Zabot; Q. Di Domenico; A.P. Madureira; S.F.N. Pértile
10/17/2013
Citrus latifolia; Genetic diversity; Genetic improvement

'Persian' acid lime (PAL) is the most important triploid commercial citrus crop planted in the world. Little is known about the genetic variability of the selections used in Brazil. Therefore, 25 genotypes originating from the PAL, and three control species, Citrus sunki, C. limon, and C. aurantiifolia, were assessed using inter-simple sequence repeat (ISSR) and ... more

M.G. Santos; O.S. Passos; W.S.Soares Filho; E.A. Girardi; A.S. Gesteira; C.F. Ferreira
10/04/2012
Forage; Genetic improvement; Plant resistance

An understanding of the interaction between spittlebugs and forage grasses is essential for establishing factors that favor productive pastures. In the present study, we evaluated the protein profiles of the spittle of Mahanarva spectabilis (Distant, 1909) (Hemiptera: Cercopidae) fed various elephant grass genotypes. Each plant was infested with a single fifth-instar M. ... more

A.M. Auad; M.F. Martins; I. Fonseca; S.V. Paula-Moraes; M.M. Kopp; M.C. Cordeiro
08/31/2012
Genetic improvement; Popping expansion; Productivity; Zea mays

This study aimed to obtain estimates of stability and adaptability of phase launched materials and materials recommended in the country, for the northern and northwestern regions of Rio de Janeiro State, Brazil, and made a comparative analysis of different methods to evaluate stability and adaptability of grain yield and popping expansion. To this end, 10 genotypes were evaluated (UNB2U- ... more

G.F. Pena; A.Tdo Amaral Júnior; L.S.A. Gonçalves; L.S. Candido; C. Vittorazzi; R.M. Ribeiro; S.P.Freitas Júnior
04/10/2012
Genetic improvement; Plant breeding; Selection efficiency

The objective of this study was to compare the BLUP selection method with different selection strategies in F2:4 and assess the efficiency of this method on the early choice of the best common bean (Phaseolus vulgaris) lines. Fifty-one F2:4 progenies were produced from a cross between the CVIII8511 x RP-26 lines. A randomized block design was used with 20 ... more

M.P. Mendes; M.A.P. Ramalho; A.F.B. Abreu
08/28/2014
Genetic improvement; Honeybee queen selection; Major royal jelly proteins; mrjp3; Polymorphism

It is important to select the best honeybees that produce royal jelly to identify important molecular markers, such as major royal jelly proteins (MRJPs), and hence contribute to the development of new breeding strategies to improve the production of this substance. Therefore, this study focused on evaluating the genetic variability of mrjp3, mrjp5, and mrjp8 ... more

R.S. Parpinelli; M.C.C. Ruvolo-Takasusuki; V.A.A. Toledo
03/12/2014
Genetic improvement; Multi-diverse analysis; Saccharum

This study evaluated different strategies to select sugar cane families and obtain clones adapted to the conditions of the Brazilian savannah. Specifically, 7 experiments were conducted, with 10 full sib families, and 2 witnesses in common to all experiments, in each experiment. The plants were grown in random blocks, with witnesses in common (incomplete blocks), and 6 repetitions of each ... more

M.H.P. Barbosa; A. Ferreira; L.A. Peixoto; M.D.V. Resende; M. Nascimento; F.F. Silva

Pages