Zea Mays
Genetic Evaluation for Effects of Salt and Drought Stress on Growth Traits of Zea mays Seedlings
Authors: M. Khalil, M.S. Rashid, Q. Ali and A. Malik
Maize is an important grain cash crop grown throughout the world for its grain and fodder. It is highly sensitive for abiotic stress conditions; like drought, chilling, alkalinity, heat, salt and cold conditions. Present study was carried out to find out the effects of salt or NaCl and drought stress on three selected maize genotypes viz., P6103, L5971 an.. Read More»
- Genet. Mol. Res. 19(3):
Genetic damage in Mexican and South American sweet corn varieties due to the use of herbicides (Nicosulfuron and Topramezone)
Authors: M.S. Reynoso, C.M. Alvarez, L.L. De la Cruz, J.F.G. Landeros, J.J.G. S�¡nchez, A.R.A. Villalobos
In order to encourage corn production, several herbicides such as nicosulfuron and topramezone are used. Though they offer great advantages, they may affect crop productivity and may even induce DNA damage. This study evaluated genotoxic activity at two nicosulfuron concentrations (40,000 and 80, 000 ppm) and at four topramezone concentrations (1480, 148,.. Read More»
- Genet. Mol. Res. 17(4):
- http://dx.doi.org/gmr16039921
- DOI:
- http://dx.doi.org/10.4238/gmr16039921
Heterosis and genetics parameters for yield and nutritional components in half-sibling maize progenies
Authors: Ivan Ricardo Carvalho, Alan Junior de Pelegrin, MaurÃ?Âcio Ferrari, VinÃ?Âcius Jardel Szareski, , Antonio Costa de Oliveira, Luciano Carlos da Maia, Tiago Corazza da Rosa, Victoria Freitas de Oliveira, Jessica Fernanda Hoffmann, Maicon Nardino, FÃ?¡bio Clasen Chaves, Velci QueirÃ?³z de Souza
The growing demand for maize creates a challenge to breeders, requiring the development of higher yielding and higher quality genotypes. The objective of this work was to estimate the most relevant heterosis, variance components and genetic parameters, and to use a multivariate approach to define narrow sense heritability prof.. Read More»
- Genet. Mol. Res. 17(1):
- gmr16039894
- DOI:
- 10.4238/gmr16039894
Genetic control and combining ability of agronomic attributes and northern leaf blight-related attributes in popcorn
Authors: J.S. Santos, A.T. Amaral J�ºnior, M. Vivas, G.S. Mafra, G.F. Pena,F.H.L. Silva and A.G. Guimar�£es
The present study was conducted to investigate the genetic control and to estimate the general and specific combining abilities of popcorn for agronomic attributes and attributes related to resistance to northern leaf blight (NLB). The 56 hybrids (F1 and reciprocals), together with the eight parent lines and six controls, were.. Read More»
- Genet. Mol. Res. 16(3):
- gmr16039772
- DOI:
- 10.4238/gmr16039772
Indices estimated using REML/BLUP and introduction of a super-trait for the selection of progenies in popcorn
Authors: C. Vittorazzi, A.T. Amaral Junior, A.G. Guimar�£es, A.P. Viana, F.H.L. Silva, G.F. Pena, R.F. Daher, I.F.S Gerhardt, G.H.F. Oliveira and M.G. Pereira
Selection indices commonly utilize economic weights, which become arbitrary genetic gains. In popcorn, this is even more evident due to the negative correlation between the main characteristics of economic importance - grain yield and popping expansion. As an option in the use of classical biometrics as a selection index, the .. Read More»
- Genet. Mol. Res. 16(3):
- gmr16039769
- DOI:
- 10.4238/gmr16039769
Intraspecific variability of popcorn S7 lines for phosphorus efficiency in the soil
Authors: I.F.S. Gerhardt, A.T. Amaral J�ºnior, L.J.M. Guimar�£es, I.A. Schwantes, A. Santos, S.H. Kamphorst, V.J. Lima, F.M. Poblete and G.O. Myers
The expansion of agriculture, coupled with the need for sustainable cropping, is one of the greatest challenges of the scientific community working on the generation of new cultivars adapted to abiotic stress conditions. The aim of this study was to evaluate the variability of popcorn lines as to responsiveness and efficiency .. Read More»
- Genet. Mol. Res. 16(3):
Diallel and prediction (REML/BLUP) for yield components in intervarietal maize hybrids
Authors: I.R. Carvalho, A.J. de Pelegrin, V.J. Szareski, M. Ferrari, T.C. da Rosa, T.S. Martins, N.L. dos Santos, M. Nardino, V.Q. de Souza, A.C. de Oliveira and L.C. da Maia
Genetic improvement is essential to achieve increments in maize (Zea mays L.) grain yield components. It may be obtained through crosses, which enable to exploit the effects of intervarietal heterosis, allelic complementarity, as well as gene actions and effects. This study estimated the components of variance and genetic para.. Read More»
- Genet. Mol. Res. 16(3):
- gmr16039734
- DOI:
- 10.4238/gmr16039734
Efficiency of selection per se and in single-cross hybrids for disease resistance in maize
Authors: R.B. Camargos, R.G. Von Pinho, M. Balestre, R.A.D.C. Ferreira, K.O.G. Dias, L.P.M. Pires and V.F. Souza
Plant breeding strategies are constantly refined to increase efficiency during the selection process. Consequently, the aims of this study were to examine genetic control and efficiency of selection based on the per se performance of maize lines and based on hybrid performance in reaction to white spot, common rust, and ear ro.. Read More»
- Genet. Mol. Res. 16(3):
- gmr16039716
- DOI:
- 10.4238/gmr16039716
Genetic variability among elite popcorn lines based on molecular and morphoagronomic characteristics
Authors: J.F. dos Santos, C.A. Mangolin, M.F.P.S. Machado, C.A. Scapim, W. Giordani and L.S.A. Gon�§alves
Knowledge of genetic diversity among genotypes and relationships among elite lines is of great importance for the development of breeding programs. Therefore, the objective of this study was to evaluate genetic variability based on the morphoagronomic and molecular characterization of 18 elite popcorn (Zea mays var. everta) li.. Read More»
- Genet. Mol. Res. 16(2):
- gmr16029243
- DOI:
- 10.4238/gmr16029243
Maize hybrid stability in environments under water restriction using mixed models and factor analysis
Authors: A.O. Santos, J.J. Nuvunga, C.P. Silva, L.P.M. Pires, R.G. Von Pinho, L.J.M. Guimar�£es and M. Balestre
In several crops, the water deficit is perhaps the main limiting factor in the search for high yields. The objective of this study was to evaluate the phenotypic stability of maize hybrids in environments with and without water restriction using the analytical factor (AF) approach. We evaluated 171 maize hybrids in 14 environm.. Read More»
- Genet. Mol. Res. 16(2):
- gmr16029672
- DOI:
- 10.4238/gmr16029672