C.A. Scapim
Genetic variability among elite popcorn lines based on molecular and morphoagronomic characteristics
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) lines to be used by Universidade Estadual .. Read More»
Genet. Mol. Res. 16(2): gmr16029243
DOI: 10.4238/gmr16029243
Genetic diversity of popcorn genotypes using molecular analysis
In this study, we analyzed dominant molecular markers to estimate the genetic divergence of 26 popcorn genotypes and evaluate whether using various dissimilarity coefficients with these dominant markers influences the results of cluster analysis. Fifteen random amplification of polymorphic DNA primers produced 157 amplified fragments, of which 65 were monomorphic and 92 were polymorphic. To cal.. Read More»
Genet. Mol. Res. 14(3): 2015.August.19.16
DOI: 10.4238/2015.August.19.16
Genetic distances between popcorn populations based on molecular markers and correlations with heterosis estimates made by diallel analysis of hybrids
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. Th.. Read More»
Genet. Mol. Res. 8(3): vol8-3gmr592
DOI: 10.4238/vol8-3gmr592
Selection index based on the relative importance of traits and possibilities in breeding popcorn
One of the major difficulties faced by popcorn breeders is the negative correlation between popping expansion (PE) and grain yield (GY). It is necessary to overcome this difficulty to obtain promising genotypes. One helpful tool in this process is a selection index because it allows multiple features of interest to be selected. Thus, the present study proposes a new.. Read More»
Genet. Mol. Res. 15(2): gmr.15027719
DOI: 10.4238/gmr.15027719
Heterotic groups in tropical maize germplasm by test crosses and simple sequence repeat markers
The objectives of the present study were to determine heterotic groups of germplasm lines of tropical maize by test crosses and by simple sequence repeat (SSR) markers and to compare five grouping methods of heterogeneous maize. Sixteen lines of nine populations in the S5 generation were evaluated in test crosses with three testers. The results of four experimental trials over two years were us.. Read More»
Genet. Mol. Res. 7(4): vol7-4gmr495
DOI: 10.4238/vol7-4gmr495
Meiotic behavior as a selection tool in silage corn breeding
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 meio.. Read More»
Genet. Mol. Res. 9(4): vol9-4gmr924
DOI: 10.4238/vol9-4gmr924
Combining ability of tropical and temperate inbred lines of popcorn
In Brazil, using combining ability of popcorn genotypes to achieve superior hybrids has been unsuccessful because the local genotypes are all members of the same heterotic group. To overcome this constraint, 10 lines (P1 to P10) with different adaptations to tropical or temperate edaphoclimatic environments were used to obtain 45 F1 hybrids in a complete diallel. Th.. Read More»
Genet. Mol. Res. 9(3): vol9-3gmr900
DOI: 10.4238/vol9-3gmr900
Genetic diversity of Capsicum chinensis (Solanaceae) accessions based on molecular markers and morphological and agronomic traits
We estimated the genetic diversity of 49 accessions of the hot pepper species Capsicum chinensis through analyses of 12 physicochemical traits of the fruit, eight multi-categorical variables, and with 32 RAPD primers. Data from the physicochemical traits were submitted to analysis of variance to estimate the genetic parameters, and their means were clustered by the .. Read More»
Genet. Mol. Res. 9(3): vol9-3gmr891
DOI: 10.4238/vol9-3gmr891
Genetic divergence among sweet corn lines estimated by microsatellite markers
The purpose of this study was to analyze the genetic diversity of 15 sugary-1 sweet corn lines by microsatellite markers. One hundred pairs of simple sequence repeat primers that were mapped for field corn were tested. Of these primers, 15% were polymorphic, and all were selected for the evaluation. These primers identified a total of 39 alleles among the 15 loci that were evaluated... Read More»
Genet. Mol. Res. 13(4): 2014.December.12.3
DOI: 10.4238/2014.December.12.3
ms17: a meiotic mutation causing partial male sterility in a corn silage hybrid
Cytological analysis under light microscopy of the single hybrid P30R50 of silage corn revealed an abnormal pattern of microsporogenesis that affected the meiotic products. Meiosis progressed normally until diakinesis, but before migration to the metaphase plate, bivalents underwent total desynapsis and 20 univalent chromosomes were scattered in the cytoplasm. At th.. Read More»
Genet. Mol. Res. 10(3): vol10-3gmr1037
DOI: 10.4238/vol10-3gmr1037
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