Environment Stratification in the Evaluation of Corn Hybrids in Southern Brazil

Nardino, Maicon; Baretta, Diego; Carvalho, Ivan Ricardo; Olivoto, Tiago; Follmann, Diego Nicolau; Pelegrin, Alan Junior de; Szareski, Vinícius Jardel; Lautenchleger, Francine; Rosa, Tiago Corazza da; Barbosa, Mauricio Horbach; Konflanz, Valmor Antônio; Barros, Willian Silva; Souza, Velci Queiróz de

doi:10.5539/jas.v10n10p333

Cited by 7 publications

(8 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Gorgulho and Miranda Filho (2001), the height and the insertion of the ear are highly dependent on the characteristics of the genotypes and growing environments. Plant height is determined genetically Nardino et al, 2018), influenced by plant population (Brachtvogel et al, 2012) and soil nutrient availability (Paterniani, 1997;Cortez et al, 2009;Repke et al, 2013). The EHE varied according to the genotype and growing environment; for Pelotas there was superiority for the PL1, PL2, HP1, HP2 and HP3 genotypes, in contrast, Entre-Ijuís showed higher magnitudes for this character through the PL1, HP3, PL2, HP2 and HC2 genotypes.…”

Section: Resultsmentioning

confidence: 99%

Research Article Productive performance and multivariate interrelations of open-pollinated and hybrid maize in Brazil

Troyjack¹,

Pimentel²,

Carvalho³

et al. 2019

Genet. Mol. Res.

View full text Add to dashboard Cite

Corn is considered one of the most important crops in the world agricultural scenario. In order to improve production, it is crucial to understand and quantify the genetic variation involved in the phenotypic manifestation of this species. We evaluated the agronomic performance of open pollinated genotypes, used by small scale family farmers, compared to commercial hybrid genotypes in various growing environments. The experimental design was a randomized block and the treatments were arranged in four replicates. Eight maize genotypes were used: three open-pollinated varieties and five simple hybrids. The following characters were measured plant height, ear insertion height, stem diameter, ear length, number of seed rows of the ear, number of seeds per row of ear, thousand seed weight and seed yield. The best yields of seeds were obtained in Entre-Ijuís, RS. Seed yield varied according to the genotype and growing environment; in Pelotas, RS the highest yields were obtained with the HC2 and HC1 genotypes (9090 and 9002 kg.ha -1 , respectively). Genotypes with a narrow genetic base express less variation in their responses to the environments, in contrasting ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 18 (3): gmr18180 C. Troyjack et al. 2 environments. Under limiting conditions the open pollinated varieties responded favorably. The use of biometric approaches allows us to reveal patterns in the grouping of genotypes.

show abstract

Section: Resultsmentioning

confidence: 99%

Research Article Productive performance and multivariate interrelations of open-pollinated and hybrid maize in Brazil

Troyjack¹,

Pimentel²,

Carvalho³

et al. 2019

Genet. Mol. Res.

View full text Add to dashboard Cite

show abstract

“…This character is of extreme importance for the crop, since it is determinant for the best balance of the plant (Kappes et al, 2011;Nardino et al, 2016b). Research has shown that this characteristic can be influenced by the intraspecific competition of plants per unit area (Kappes et al, 2011;Nardino et al, 2016c), high levels of nitrogen fertilizers (Santos et al, 2010), potassic fertilizers (Rodrigues et al, 2014), and characteristics of the genotype used (Meira, 2006). Studies have determined that 83% of modern corn genotypes show a height of spike insertion of around 1.3 m (Sawazaki & Paterniani, 2004).…”

Section: Resultsmentioning

confidence: 99%

Interrelations of Characters and Multivariate Analysis in Corn

Szareski¹,

Carvalho²,

Kehl³

et al. 2018

JAS

Self Cite

View full text Add to dashboard Cite

The objective of this work was to evaluate the agronomic performance of corn hybrids, the interrelations of the characters with the grain yield, and to genetically discriminate the corn hybrids by means of the dispersion analysis of the canonical variables. The experiment was conducted in the agricultural crop of 2013/2014, in an area belonging to the Federal University of Santa Maria, Campus of Frederico Westphalen, RS. The experimental design was a randomized block design, with four replications. The treatments were composed of seven maize hybrids with different genetic bases and maturation cycles. The LG 6304 modified simple hybrid has higher grain yield than the others. The characters plant height, spike insertion height and number of grains per row of spike have positive interrelations with grain yield of corn hybrids. Hybrids are not grouped according to the genetic basis and maturation cycle. The canonical variables explain 94.62% of the existing genetic variation, and allows the formation of five groups of maize hybrids.

show abstract

“…Detasseling is done prior to full maturity of anthers, when the tassel has emerged out of the leaf sheath. Detasseling is approached very carefully, it is performed either manually with a skilled labor [3,4], since the base of the tassel is not visible, or mechanically. With more intensive defoliation, there is greater certainty that the entire tassel would be removed.…”

Section: Introductionmentioning

confidence: 99%

Direct and Joint Effects of Genotype, Defoliation and Crop Density on the Yield of Three Inbred Maize Lines

Ranković¹,

Todorović

Tabaković

et al. 2021

Agriculture

View full text Add to dashboard Cite

The aim of this study was to observe direct and joint effects of three factors (genotypes, ecological environmental conditions and the applied crop density) on the level of defoliation intensity and yield. Three inbred lines (G) of maize (G1–L217RfC, G2–L335/99 and G3–L76B004) were used in the study. The trials were performed in two years (Y) (Y1 = 2016 and Y2 = 2017) and in two locations (L) (L1 and L2) under four ecological conditions of the year–location interaction (E1–E4) and in two densities (D1 and D2) (50,000 and 65,000 plants ha−1). Prior to tasselling, the following five treatments of detasseling and defoliation (T) were applied: T1—control, no leaf removal only detasseling, T2–T5—removal of tassels and top leaves (from one to four top leaves). The defoliation treatments had the most pronounced effect on the yield reduction in G1 (T1–Tn+1… T5), p < 0.05. The ecological conditions on yield variability were expressed under poor weather conditions (E3 and E4), while lower densities were less favorable for the application of defoliation treatments. The result of joint effects of factors was the lowest grain yield (896 kg/ha) in G3 in the variant E3D1 for T2 and the highest grain yield (11,389 kg/ha) in G3 in the variant E2D2 for T1. The smallest effect of the defoliation treatment was on the kernel row number (KRN).

show abstract

Environment Stratification in the Evaluation of Corn Hybrids in Southern Brazil

Cited by 7 publications

References 11 publications

Research Article Productive performance and multivariate interrelations of open-pollinated and hybrid maize in Brazil

Research Article Productive performance and multivariate interrelations of open-pollinated and hybrid maize in Brazil

Interrelations of Characters and Multivariate Analysis in Corn

Direct and Joint Effects of Genotype, Defoliation and Crop Density on the Yield of Three Inbred Maize Lines

Contact Info

Product

Resources

About