Research Article

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09/27/2017
Brazil; Ecosystem; Evolution, Molecular; Gene Pool; Genotype; Gossypium; Polymorphism, Genetic; Quantitative Trait, Heritable; seeds; Selective breeding

Mocó cotton belong to the same species as the cultivated species, Gossypium hirsutum, and cultivated forms were mainly landraces but also developed as cultivars, bearing good fiber quality and drought tolerant when cropped as a perennial species. The northeast Brazil crop system based on this cotton type is finished, with a few small area planted in the three main States, where it was ... more

I.P.P. de Menezes; L.V. Hoffmann; T.H. de Lima; A.R. da Silva; V.S. Lucena; P.A.V. Barroso
09/21/2017
Brazil; Chromosomes, Plant; Flowers; Hybridization, Genetic; Orchidaceae; Pigmentation; Ploidies; Polymorphism, Genetic

Studies addressing chromosome variations have elucidated many points regarding the taxonomy of the Orchidaceae. Epidendrum L. besides being one the largest orchid genera, present remarkable morphological, and inter- and intraspecific chromosome variations. Thus, based on a previous report on flower color variation in individuals of E. ibaguense (magenta, pink, white, and red), our aim was to ... more

S.R. Nóbrega; A.L.F. Coelho; C.F. Verola; I.R. Costa; R. Vilaça; F.J.F. Luz; W.F. Araújo
09/21/2017
Brazil; Coffea; Genotype; Multivariate analysis; Polymorphism, Genetic

For the selection of coffee plants that have favorable characteristics, it is necessary to evaluate variables related to production. Knowledge of the genetic divergence of arabica coffee is of extreme importance, as this knowledge can be associated with plant breeding programs in order to combine genetic divergence with good productive performance. The objective of this study was to evaluate ... more

C.M.S. Machado; N.S. Pimentel; A. Golynsk; A. Ferreira; H.D. Vieira; F.L. Partelli
12/02/2016
DNA, Plant; Edible Grain; Genetic variation; Hordeum; Minerals; Plant breeding; Quantitative trait loci; Selection, Genetic

Mineral elements in barley (Hordeum vulgare) play an important physiological role in global human health. In this study, quantitative trait loci (QTLs) for concentration of nine mineral elements in barley grain and grass powder were detected in a population of 193 recombinant inbred lines of the barley cross Ziguangmangluoerling x Schooner and the parents. We observed large genetic variation ... more

Y.W. Zeng; J. Du; X.M. Yang; X.Y. Pu; L.X. Wang; J.Z. Yang; L.J. Du; T. Yang; S.M. Yang; Z.H. Sun
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cluster analysis; Conservation of Natural Resources; DNA, Plant; Genetic markers; Genetic variation; Genetics, Population; Microsatellite Repeats; Myrtaceae; Phylogeny; Plant breeding

Myrcia lundiana Kiaersk. is a tree of the family Myrtaceae found in tropical and subtropical areas of the southern hemisphere that produces essential oil. The aim of this study was to characterize the genetic diversity of M. lundiana plants from a native population of Parque Nacional de Itabaiana, using inter-simple sequence repeat molecular markers. Thirty-five primers were tested, 20 of ... more

M.F. Alves; D.A.C. Nizio; F.A. Brito; T.S. Sampaio; A.V.C. Silva; M.F. Arrigoni-Blank; S.V.A. Carvalho; A.F. Blank
12/19/2016
Plant breeding; Quantitative trait loci; Quantitative Trait, Heritable; Selection, Genetic; Zea mays

A challenge faced by popcorn breeding programs is the existence of a negative correlation between the two main traits, popping expansion and yield, which hinders simultaneous gains. The objective of this study was to investigate the use of a new variable or super trait, which favors the reliable selection of superior progenies. The super trait 'expanded popcorn volume per hectare' was ... more

A.T. do Amara Junior; D. Santos; I.F.S. Gerhardt; R.N.F. Kurosawa; N.F. Moreira; M.G. Pereira; deA. Gravina; F.H. de L. Silva
2/23/2017
Analysis of variance; Anthocyanins; China; Chromatography, High Pressure Liquid; cluster analysis; Color; Conservation of Natural Resources; Endangered species; Flowers; Genetic markers; Genetic variation; Magnolia; Microsatellite Repeats; Phenotype; Phylogeny; Pigmentation; Plant breeding; Species Specificity

A combination of phenotypic characterization and molecular markers may provide reliable information on new plant varieties and elucidate the conservation status of rare species. Five newly developed Magnolia wufengensis cultivars, an endangered plant species endemic to Hubei Province, China, possess more distinctive phenotypes than common Magnolia cultivars. With reference to a wild species ... more

L. Wang; A.H. Xiao; L.Y. Ma; F.J. Chen; Z.Y. Sang; J. Duan
3/15/2017
Genes, Plant; Genetic variation; Phenotype; Plant breeding; Saccharum; Selection, Genetic; Sucrose

Sugarcane breeding programs have been adapting to a new market demand: aside from high sucrose yield per hectare, the sector needs new cultivars with higher fiber percentages. The selection of sugarcane clones based on phenotype alone is a complex task. The selected clones should display high performance in a series of yield- and quality-related traits. Selection indices can provide ... more

A.A.C. de Azeredo; L.L. Bhering; B.P. Brasileiro; C.D. Cruz; L.C.I. Silveira; R.A. Oliveira; J.C.Bespalho Filho; E. Daros
3/30/2017
Crop Production; Edible Grain; Plant breeding; Zea mays

The objective of this study was to estimate the direct effects of explanatory variables on the grain yield of corn in the combinations formed by three types of hybrids x two harvests x nine scenarios of explanatory variables x two types of path analyses. Eleven explanatory variables were measured in 361, 373, and 416 single-, triple-, and double-cross hybrid plants from the 2008/2009 harvest, ... more

M. Toebe; C. Filho; L. Storck; A.D. Lúcio
4/13/2017
Models, Genetic; Plant breeding; Quantitative Trait, Heritable; Sample Size; Zea mays

The objective of this study was to assess the sample size required for estimating the direct effects of explanatory variables on the grain yield of corn in the combinations formed by three types of hybrids x two harvests x nine scenarios of explanatory variables x two types of path analyses x four levels of accuracy. A total of 6340 plants were evaluated (361, 373, and 416 plants from single ... more

M. Toebe; C. Filho; L. Storck; A.D. Lúcio

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