Research Article

Related GMR Articles

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
Bayesian shrinkage analysis; common bean; Plant breeding; Quantitative trait loci; Sclerotinia sclerotiorum

In this study, we identified simple sequence repeat, ampli­fied fragment length polymorphism, and sequence-related amplified poly­morphism markers linked to quantitative trait loci (QTLs) for resistance to white mold disease in common bean progenies derived from a cross between lines CNFC 9506 and RP-2, evaluated using the oxalic acid test and using Bayesian analysis. DNA was extracted ... more

L.A.C. Lara; J.B. Santos; M. Balestre; I.A. Lima; A.K.A. Pamplona; J.S. Veloso; P.H. Silva
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
ISSR; Plant breeding; Zea mays L.

We examined the effect of incorporation of molecular markers on variability between and within populations in order to maximize heterotic effects and longevity of a maize reciprocal recurrent selection program. Molecular variability was quantified by inter-simple sequence repeat (ISSR) markers between and within the maize populations Cimmyt and Piranão in the 10th cycle of a reciprocal ... more

A.P.C.G. Berilli; M.G. Pereira; L.S.A. Gonçalves; K.S. da Cunha; H.C.C. Ramos; G.A.Souza Filho; A.Tdo Amaral Júnior
Biofuel; Genetic variability; Ipomoea batatas L.; Plant breeding

The sweet potato (Ipomoea batatas L.) is a crop of great importance in developing countries, as a food staple, for animal feed, and potentially for biofuel. Development of cultivars adapted to specific regions within these countries would be useful. To start a breeding program, the first step is the establishment of a germplasm bank. We initiated a sweet potato germplasm bank ... more

L.K.P. Camargo; A.F. Mógor; J.T.V. Resende; P.R. Da-Silva
Field trial; Monte Carlo simulation; Plant breeding; Plot size; Statistics

We aimed to establish standards for tobacco Valor de Cultivo e Uso (VCU) in Brazil. We obtained information regarding the size and design of plots of two varietal groups of tobacco (Virginia and Burley). Ten inbred lines of each varietal group were evaluated in a randomized complete block design with four replications. The plot contained 42 plants with six rows of seven columns each. For ... more

F.H.R.B. Toledo; M.A.P. Ramalho; C.E. Pulcinelli; A.T. Bruzi
DNA methylation; Epigenetic inheritance; Molecular marker; Mutation analysis; Plant breeding

Fig (Ficus carica) breeding programs that use conventional approaches to develop new cultivars are rare, owing to limited genetic variability and the difficulty in obtaining plants via gamete fusion. Cytosine methylation in plants leads to gene repression, thereby affecting transcription without changing the DNA sequence. Previous studies using random amplification of polymorphic ... more

M.G.F. Rodrigues; A.B.G. Martins; B.W. Bertoni; A. Figueira; S. Giuliatti
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
Compound inflorescence; Genetic components; Heritability; Phaseolus vulgaris; Plant breeding

The number of pods per common bean plant is a primary component of grain yield, which depends on the number of flowers produced and on the flower set. Thus, a larger number of flowers per plant would increase yield. Lines with inflorescences that had a large number of flowers compared to common bean plants now under cultivation were identified. We analyzed the genetic control of this ... more

S.R. Guilherme; M.A.P. Ramalho; deF.B. Abreu; L.A. Pereira