Research Article

Related GMR Articles

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
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
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
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
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
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
Genetic improvement; Recurrent selection; Selection index; Zea mays

The popcorn breeding program of Universidade Estadual do Norte Fluminense Darcy Ribeiro aims to provide farmers a cultivar with desirable agronomic traits, particularly with respect to grain yield (GY) and popping expansion (PE). We evaluated full-sib families from the seventh cycle of recurrent selection and estimated the genetic progress with respect to GY and PE. Eight traits were ... more

I.L.J. Freitas; A.Tdo Amaral Júnior; S.P. Freitas; P.D.S. Cabral; R.M. Ribeiro; L.S.A. Gonçalves
Beta-carotene; Fruit firmness; Lycopene; Lycopersicon esculentum; Plant breeding; Ripening mutants

The effects of the fruit ripening mutant gene alcobaça (alc) and color development mutants, old gold-crimson (ogc) and high pigment (hp), on yield and post-harvest quality of tomato fruits were investigated. Five tomato hybrids were obtained by crossing near isogenic lines with Flora-Dade background [Flora-Dade (alc+/alc+ ogc+ ... more

M.Ventura Faria; W.Roberto Maluf; S.Márcio de Azevedo; V.Carvalho Andrade-Júnior; L.Antonio Au Gomes; P. Moretto; V. Licursi
Fruit quality; Fruit shelf life; Plant breeding; Plant genetic resources; Tomato

The effects of wild germplasm on tomato fruit shelf life have not yet been completely evaluated. Three different genotypes of Lycopersicon esculentum (a cultivated variety, a homozygote for nor and a homozygote for rin), LA1385 of L. esculentum var. cerasiforme, LA722 of L. pimpinellifolium, and 10 diallel hybrids were assayed. Mean ... more

G. Pratta; L.A. Picardi; R. Zorzoli
Cassava; India; Plant breeding; Productivity

South America is responsible for about half of the cassava world production. In the 1970’s productivity of the crop on the continent was about 15 ton/ha, and dropped continuously until reaching 12 ton/ha in 2004. India’s productivity of cassava increased from 10 ton/ha in the 1970’s to 28 ton/ha in 2004. Brazil contributed significantly to improving cassava crops through the Instituto ... more

N.M.A. Nassar