Research Article

Related GMR Articles

diallel analysis; Genetic divergence; Heterosis; Molecular markers; Popcorn; Zea mays

Diallel analysis was used to obtain information on com­bining ability, heterosis, estimates of genetic distances by random amplified polymorphic DNA (RAPD) and on their correlations with heterosis, for the popcorn varieties RS 20, UNB2, CMS 43, CMS 42, Zélia, UEM J1, UEM M2, Beija-Flor, and Viçosa, which were crossed to obtain all possible combinations, without reciprocals. The genitors ... more

R.E.F. Munhoz; A.J. Prioli; A.T.Amaral Júnior; C.A. Scapim; G.A. Simon
Beef cattle; Crossbreeding; Heterosis; performance

The aim of the present study was to evaluate the heterosis effects on weaning weight at 205 days (WW, n = 146,464), yearling weight at 390 days (YW, n = 69,315) and weight gain from weaning to yearling (WG, n = 59,307) in composite beef cattle. The fixed models were: RM, which included contemporary groups, class of age of dam, outcrossing percentages for direct and maternal effects, and ... more

G.B. Mourão; J.B.S. Ferraz; J.P. Eler; R.S. Bueno; J.C.C. Balieiro; E.C. Mattos; L.G.G. Figueiredo
Combining ability; Heterosis; Line x tester analysis; Salinity; Seedlings; Tomato

We attempted to find the suitable parents for the development of tomato hybrids for high salt soils by exploiting combining ability, gene action and heterosis. Six salt-tolerant and three salt-intolerant genotypes, along with their 18 F1 crosses, were evaluated at seedling stage under 10 and 15 dS/m (NaCl) salinity stress, compared to the control level of salinity. The experiment was laid ... more

A. Saeed; M.Q. Shahid; S.A. Anjum; A.A. Khan; A. Shakeel; M.F. Saleem; N. Saeed
Breeding; Chromosome stickiness; Guineagrass; Hybrid; Meiosis; Poaceae

Chromosome stickiness has been studied in several species of higher plants and is characterized by sticky clumps of chromatin resulting in sterility. Chromosome stickiness was recorded in Panicum maximum hybrid plants that were cultivated in the field. In the meiocytes affected, chromosomes clumped into amorphous masses that did not orient themselves on the equatorial plate, and ... more

C. Pessim; M.S. Pagliarini; N. Silva; L. Jank
Genetic diversity; Germplasm conservation; Maize; Random amplified polymorphic DNA

Ten maize accessions (NC-9, A50-2, M-14, B-42, NC-3, T-7, N-48-1, B-34, USSR, and WFTMS) were studied to estimate the genetic distance on molecular level by random amplified polymorphic DNA. These accessions were selected on the basis of their variable responses against different levels of moisture. Twenty-five primers were used to test genetic diversity, of which 14 were observed to be ... more

M. Aslam; F.S. Awan; I.A. Khan; A.I. Khan
Genetic variation; Maize; Quantitative traits; RAPD markers; Zea mays

We compared DNA-based genetic diversity estimates with conventional estimates by investigating agronomically important traits in maize grown in the northwestern region of Pakistan. RAPD markers were used to characterize 10 commonly cultivated maize genotypes. The same material was tested for phenotypic variation of quantitative traits using replicated field trials. The genetic distances ... more

M.M. Shah; S.W. Hassan; K. Maqbool; I. Shahzadi; A. Pervez
High amylase; Maize; marker-assisted selection; Starch branching enzyme

The ae (amylose extender) recessive mutant alleles in maize are an important genetic resource for the development of high-amylose cultivars. On the basis of ae allele sequences (from the National Center for Biotechnology Information), the ae mutant alleles were cloned from high-amylose maize and the allelic Ae gene from common maize luyuan92 inbred ... more

F. Chen; S.W. Zhu; Y. Xiang; H.Y. Jiang; B.J. Cheng
Ear leaf; Maize; Nitrogen regime; QTL; Recombinant inbred line

The ear leaf is one of the most important leaves in maize (Zea mays); it affects plant morphology and yield. To better understand its genetic basis, we examined ear leaf length, ear leaf width, and ear leaf area for quantitative trait locus (QTL) mapping in a recombinant inbred line population under two nitrogen regimes. Nine QTLs, on chromosomes 1 (one), 2 (one), 3 (one), 4 ( ... more

Z.P. Zheng; X.H. Liu
Half-sib; Heritability; Khyber Pakhtunkhwa; Maize; Pahari; Recurrent selection

This research was carried out at the Agriculture Research Farm, Khyber Pakhtunkhwa Agricultural University, Peshawar, and the Cereal Crops Research Institute, Pirsabak, Nowshera, during 2009 and 2010. Half-sib families (HS) derived from the maize variety Pahari in spring crop seasons 2009 and 2010 were developed at the Cereal Crops Research Institute. All HS families were detasseled well ... more

M. Noor; D. Shahwar; H. Rahman; H. Ullah; F. Ali; M. Iqbal; I.A. Shah; I. Ullah
Maize; Nitrogen regime; Plant architecture; QTL

Maize (Zea mays L.) is one of the most important cereal crops worldwide, and increasing the grain yield and biomass has been among the most important goals of maize production. The plant architecture can determine the grain yield and biomass to some extent; however, the genetic basis of the link between the plant architecture and grain yield/biomass is unclear. In this study, an ... more

Z.P. Zheng; X.H. Liu