Research Article

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Breeding; Hybrids; Meiosis; Silage corn

In breeding programs, commercial hybrids are frequently used as a source of inbred lines to obtain new hybrids. Considering that maize production is dependent on viable gametes, the selection of populations to obtain inbred lines with high meiotic stability could contribute to the formation of new silage corn hybrids adapted to specific region. We evaluated the meiotic stability of five ... more

V.F. Souza; M.S. Pagliarini; C.A. Scapim; M. Rodovalho; M.V. Faria
Chickpea; DNA fingerprinting; Genetic diversity; Hybrids; RAPD markers

The intensity of genetic diversity amongst chickpea genotypes and their crosses is unknown. The current study investigated the genetic diversity of chickpea genotypes and their F1 crosses by using random amplified polymorphic DNA (RAPD) markers. We assessed the variation among six chickpea genotypes and 15 F1 crosses with the RAPD markers. The six parents and their ... more

K. Mahmood; W. Nazeer; M. Naeem; S. Freed; M.A. Khan; G. Abbas; M. Iqbal; A.R. Kulachi; S.A. Sajid; M.A. Sadiq; M. Saleem
Aegilops juvenalis; Genetic similarity; Hybrids; ISSR; Triticale

Wide hybridization expands the gene pool of cultivated species and can produce genotypes with practical value, often resistant to diseases. In plants, ISSRs are often used for hybrid identification as well as for diversity evaluation. We estimated genetic similarity among advanced genetic stocks of triticale hybrids and identified Aegilops juvenalis introgressions into triticale ... more

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Additive effect; Biomass; Diallel; Hybrids; Quality traits

Elephant grass is a tropical forage plant widely distributed throughout Brazil. It was first exclusively used in the livestock sector as cattle feed. The grass is characterized by its high productivity and photosynthetic capacity and is considered as an alternative source of renewable energy. Here, we estimated the general combining ability of the parents and specific combining ability of ... more

R.F. Daher; L.B. Souza; G.A. Gravina; J.C. Machado; H.C.C. Ramos; V.Q.R. Silva; B.R.S. Menezes; L.S.A. Schneider; M.L.F. Oliveira; R.D. Gottardo
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Corn grits are used for various purposes such as flakes, snacks, livestock feed, hominy, extruded products, beer, etc. The grit size proportion varies according to the hybrid, and thus, once the use of the grits is linked to the particle size, determining the genetic effects is essential to develop hybrids for any specific use. For this purpose a complete diallel series of crosses, ... more

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Early selection; Genetic effects; Grain yield; Hybrids; Seed quality tests; Zea mays L.

Studies of genetic effects of early selection of maize based on seed quality traits are rare, especially those that use materials from different heterotic groups. These studies are also useful in tropical environments and for the advancement of sustainable agriculture with cropping during seasons not commonly used for cultivation. We estimated, through diallel crosses, the predominant ... more

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Hybrids; Plant breeding; SSR; Umbu tree

The umbu tree (Spondias tuberosa) is endemic to the Brazilian semiarid region. This species is not cultivated and commercialized fruits are a result of extrativism; consequently little has been done to develop new and more productive cultivars. Hybrids of different accessions are a result of natural open pollination, so identifying putative male parents ... more

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Morphological characters; Pathogenicity; TEF-1α; Unweighted pair group method with arithmetic mean

The occurrence of Fusarium spp associated with pecan tree (Carya illinoinensis) diseases in Brazil has been observed in recent laboratory analyses in Rio Grande do Sul State. Thus, in this study, we i) obtained Fusarium isolates from plants with disease symptoms; ii) tested the pathogenicity of these Fusarium isolates to pecan; iii) characterized and ... more

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Dactylis glomerata; Genetic diversity; Start codon-targeted markers

Orchardgrass, or cocksfoot, is an important perennial forage grass worldwide. The comprehensive understanding of orchardgrass accessions will benefit germplasm collection and breeding progress, and it will enhance efforts to improve forage yield and quality. Therefore, 24 novel, simple, polymorphic, and reliable start codon-targeted (SCoT) markers were used to analyze the diversity and ... more

L.F. Jiang; X. Qi; X.Q. Zhang; L.K. Huang; X. Ma; W.G. Xie
Dialell; Heterotic groups; Molecular markers; SSR

The objective of the present study was to correlate the genetic distances (GD) of single cross hybrids with yield, heterosis and specific combining ability (SCA) in the double cross hybrid synthesis. For this, 10 single cross commercial hybrids were used from different companies, and all the possible double hybrids were synthesized by a complete dialell. The hybrids were assessed in 15 ... more

M. Balestre; J.C. Machado; J.L. Lima; J.C. Souza; N. Filho