scholarly journals Evaluation of some Sweet Corn Hybrids for Agronomic Traits and Technological Parameters under different Planting Dates

2019 ◽  
Vol 6 (1) ◽  
pp. 49-63
Author(s):  
Ibrahim, A. I. A. Ghada, A. Alfauomy
Keyword(s):  
Sweet Corn ◽  
Agronomic Traits ◽  
Technological Parameters ◽  
Planting Dates ◽  
Corn Hybrids

scholarly journals Reciprocal Differences in Sugary × Sugary Enhancer Sweet Corn Hybrids

2008 ◽  
Vol 133 (6) ◽  
pp. 777-782 ◽  
Author(s):  
Bernardo Ordás ◽  
Rosa A. Malvar ◽  
Amando Ordás ◽  
Pedro Revilla
Keyword(s):  
Sweet Corn ◽  
Agronomic Traits ◽  
Sugar Content ◽  
Favorable Effect ◽  
Reciprocal Effects ◽  
Quality Traits ◽  
Seed Parent ◽  
Corn Hybrids ◽  
Reciprocal Differences ◽  
The Difference

Reciprocal effects in sugary × sugary enhancer hybrids of sweet corn (Zea mays L.) have been only reported for sugar content and in a very limited number of hybrids and have not been determined for agronomic traits. By evaluating 34 sugary × sugary enhancer hybrids with reciprocals in three environments, the main objectives of this work were, for agronomic and quality traits, to determine the presence or absence of reciprocal differences in the sugary × sugary enhancer hybrids, to study the interest of using sugary inbreds as seed parents of the sugary × sugary enhancer hybrids, and to determine if reciprocal differences are interacting with different genetic backgrounds and different environments. For agronomic traits as emergence, early vigor, and silking date, significant (P ≤ 0.05) reciprocal differences were found in many of the sugary × sugary enhancer hybrids, but for quality traits, significant (P ≤ 0.05) reciprocal differences were only found in a few hybrids. The sugary lines as seed parents of the crosses tended to have on average a favorable effect on agronomic traits, but this was only considerable in some environmental conditions. The difference between the sugary and sugary enhancer lines as seed parent of the crosses was strongly influenced by the genetic background.

scholarly journals Reaction of Sweet Corn to Inoculation with Barley Yellow Dwarf Virus RMV-IL

Plant Disease ◽  
1999 ◽  
Vol 83 (6) ◽  
pp. 566-568 ◽  
Author(s):  
Ronald L. C. Itnyre ◽  
Cleora J. D'Arcy ◽  
W. L. Pedersen ◽  
Laura E. Sweets
Keyword(s):  
Sweet Corn ◽  
Barley Yellow Dwarf Virus ◽  
Planting Date ◽  
Yellow Dwarf ◽  
Planting Dates ◽  
Corn Hybrids ◽  
Barley Yellow Dwarf ◽  
Virus Incidence ◽  
The Mean ◽  
Yellow Dwarf Virus

The reaction of five sweet corn hybrids to barley yellow dwarf virus (BYDV-RMV-IL) was determined in 1992 and 1993. In 1992, symptoms were observed in three of the five hybrids planted 20 May and four of the five hybrids planted 20 June. No symptoms were observed in hybrids planted June or July 1993. The mean virus incidences of RMV-IL determined by enzyme-linked immunosorbent assay (ELISA) in all plots for the May and June 1992 planting dates were 3.5 and 21%, respectively. The mean virus incidence for the inoculated plots for the June 1992 planting date was significantly higher than incidence for the control plots (29 versus 13%). Ear weights were significantly lower for inoculated plots than for the control plots (1.2 kg versus 1.4 k/10 ears). The mean virus incidences of RMV-IL in all plots for the June and July 1993 planting dates were 31 and 23%, respectively. The mean virus incidence for the inoculated plots for the June 1993 planting date was significantly higher than incidence for the control plots (49 versus 14%). Plots inoculated in June 1993 also had a significantly lower ear weight than the control plots (1.8 kg versus 2.0 kg/10 ears). A range of symptoms, infection levels, and yield responses of sweet corn hybrids to BYD-RMV-IL was demonstrated in this study. Hybrid susceptibility to this strain of BYDV should be considered when planting sweet corn from middle to late June in order to limit potential yield losses.

scholarly journals Insect Damage to Sweet Corn Hybrids in the South Atlantic European Coast

2002 ◽  
Vol 127 (4) ◽  
pp. 693-696 ◽  
Author(s):  
R.A. Malvar ◽  
P. Revilla ◽  
P. Velasco ◽  
M.E. Cartea ◽  
A. Ordás
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Insect Pests ◽  
Stem Borer ◽  
Sesamia Nonagrioides ◽  
Planting Dates ◽  
Corn Hybrids ◽  
Corn Borer ◽  
Mediterranean Countries ◽  
Over Time

The pink stem borer (PSB) (Sesamia nonagrioides Lefebvre) and the European corn borer (ECB) (Ostrinia nubilalis Hübner) are the major insect pests of corn (Zea mays L.) in Mediterranean countries, although larvae of other insects can also cause damage. The objective of this research was to evaluate the effect of sweet corn hybrids, planting time, and environment on damage by various insects. Data were recorded on the number of larvae of each of the aforementioned pests and damage produced in the ear 20 days after pollination and in the ear and stem when plants were dry. PSB was the most abundant pest, followed by ECB. Other insects, such as Mythimna unipuncta (Haworth) and Helicoverpa armigera (Hübner) were rarely found in sweet corn plants. ECB was constant over time, PSB had larger seasonal variation, and M. unipuncta and H. armigera were highly variable over time. There were significant differences among planting dates and growing cycles for damage traits in each environment. Interactions among hybrids, planting dates, and environments were significant. Dry ears were damaged more than fresh ears and stems had more larvae than ears. The economic value of the crop was seriously affected because most fresh ears had some damage, and seed production would be severely affected by PSB.

scholarly journals Agronomic traits and chemical composition of single hybrids of sweet corn

2011 ◽  
Vol 29 (4) ◽  
pp. 531-536 ◽  
Author(s):  
Angela Kwiatkowski ◽  
Edmar Clemente ◽  
Carlos Alberto Scapim
Keyword(s):  
Chemical Composition ◽  
Crop Yield ◽  
Combining Ability ◽  
Grain Quality ◽  
Sweet Corn ◽  
Agronomic Traits ◽  
Block Design ◽  
Research Station ◽  
Randomized Block Design ◽  
Fixed Model

In Brazil, the greengrocery market of sweet corn has been expanding along the country. In contrast, there have been few agri-industries canning sweet corn (Zea mays) because of the lack of cultivars with agronomic characteristics proper to industrial purposes. The purpose of this study was to evaluate the general combining ability (GCA) of seven inbred lines of sweet corn, and the specific combining ability (SCA) of their hybrid combinations based on their agronomic traits, and the chemical composition of the grain. In the growing season 2006/2007, twenty-one single hybrids were evaluated in the Iguatemi Research Station, Maringá County, Northwestern Paraná, in Brazil using a complete randomized block design with four replications. Data were subjected to the analysis of variance and the genotypes were clustered by the Scott-Knott test. We estimated the GCA and SCA effects using the Griffing's method IV with the fixed model for plant height (PH), height of ear (EH), dehusked ears yield (DEY), reducing (RS) and total sugars (TS), starch (ST), proteins (PTN), ether extract (EE) and fibers (FB). The inbred line L4, which was originated from the 'Doce de Cuba', had the best GCA for crop yield and grain quality and therefore should be used in the next hybrid combinations. The hybrids L4xL5 and L3xL7 were the most promising with regard to crop yield and grain quality.

scholarly journals Selección de líneas para formar híbridos de maíz dulce ricos en Lisina l. Probadores.

2016 ◽  
Vol 9 (2) ◽  
pp. 57
Author(s):  
María Cristina Vega ◽  
Enrique Navarro ◽  
José Espinoza ◽  
José Luis Guerrero ◽  
Gustavo A. Burciaga
Keyword(s):  
Inbred Line ◽  
Sweet Corn ◽  
Agronomic Traits ◽  
Average Response ◽  
Performance Factors ◽  
Grain Color ◽  
Color Uniformity ◽  
Ear Height ◽  
And Performance ◽  
Selection Of

Twenty S5 sweet corn lines containing the opaque-2 gene that increases Iysine  contents as well as the sugary-2 gene were evaluated. The lines were crossed with three testers: one unrelated inbred line, and two related synthetic varieties. Six commercial and three experimental hybrids were used during the trials. Test crosses were evaluated in two locations of Mexico during 1994 using a randomized complete block designo The experiment's goal was to compare lines' performance in combination with three testers, taking into account yield, soundness, uniformity, and corn quality. The average response of lines combined with testers was superior than that of commercial hybrids for traits such as flowering time and plant and ear height. Performance factors analyzed (ear length, grain color, uniformity, soundness, and number of marketable ears) in trial crosses were superior or equal in average to those in experimental hybrids, but this was not the case with sugar percentage. The best results were observed with the unrelated LD tester inbred line for agronomic traits and performance factors. This study made possible the selection of lines for future breeding based on the above mentioned traits, as well as the general combining ability for ear length and number of green flag leaves.

scholarly journals Yield and technological performance of sugarcane cultivars grown under Af climate conditions

2020 ◽  
Vol 41 (1) ◽  
pp. 73
Author(s):  
Augusto Sousa Miranda ◽  
Felipe Nogueira Domingues ◽  
Bruno Spacek Godoy ◽  
Aníbal Coutinho do Rêgo ◽  
Cristian Faturi ◽  
...  
Keyword(s):  
Reducing Sugars ◽  
Agronomic Traits ◽  
Block Design ◽  
High Yield ◽  
Technological Parameters ◽  
Climate Conditions ◽  
Sugarcane Crop ◽  
Randomized Block Design ◽  
Four Blocks ◽  
Almost All

Sugarcane crops are grown in almost all regions of Brazil, in various types of soil and under the influence of different climate conditions, which results in diverse production environments as climate factors directly influence the yield and technological quality of a sugarcane crop. The present study evaluated the agronomic and technological characteristics of sugarcane cultivars grown in Af climate conditions. The agronomic traits (natural matter production and the number, length, and diameter of stalks) and technological attributes (Brix, purity, Pol, reducing sugars, total reducing sugars, moisture, and fiber content) of three sugarcane cultivars, IACSP93-6006, RB83-5486, and SP79-1011, were determined in a three-year experiment with a randomized block design using four blocks and two repetitions per block. The cultivars IACSP93-6006 and SP79-1011 exhibited superior agronomic traits compared to RB83-5486, showing better adaptation to the soil and climate conditions of the study area. However, the technological attributes, which were below the minimum standard levels required by the sugar and ethanol industry, were not statistically different among the studied cultivars. The abundant rainfall and high temperatures, characteristics of an Af climate, were not favorable for sucrose accumulation in the IACSP93-6006, RB83-5486, and SP79-1011 cultivars. Therefore, despite the high yield, sugarcane intended for industrial purposes should not be grown under Af climate conditions, owing to the insufficient technological parameters.

scholarly journals Evaluation of Efficacy of Selected Conventional and Experimental Insecticides and Bt Hybrids for Control of Corn Earworm and European Corn Borer on Sweet Corn, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 99-100
Author(s):  
J. T. Shaw ◽  
R. Weinzierl ◽  
J. W. Finger
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Corn Earworm ◽  
Compressed Air ◽  
Hollow Cone ◽  
Corn Hybrids ◽  
Corn Borer ◽  
Chemical Treatments ◽  
Untreated Check ◽  
High Clearance

Abstract The tests were arranged in a RCB design with four replications. Each plot consisted of four rows, each being 30 inches wide and 50 ft long. Thirty-foot-wide alleys were established between the four replications. Insecticides were applied to the middle two rows of each plot, leaving two untreated rows between adjoining plots. Twelve insecticide treatments were compared with two Br-sweet corn hybrids (Heritage Bt and Bonus Bt) and their non-Bt isolines to two untreated controls. The 12 chemical treatments and the two untreated checks were planted with the Silver King variety sweet corn. Two untreated check plots were included in each replication and were averaged for the ANOVA. Treatments were applied very four to five days beginning on 8 Aug at 8% silk. All insecticide treatments were applied with a modified John Deere 6000 high-clearance vehicle (HCV) with a rear-mounted boom. Six Conejet (TX VS-8) hollow-cone nozzles (three per row) were calibrated to deliver 30.1 gpa at 40 psi and a speed of 2.5 mph, utilizing a compressed air system. Four nozzles (two per row) were attached to drops and directed the spray towards the ear zone area, a third nozzle (one per row) was mounted directly over the row with the spray being directed into the whorl (tassel) area.

scholarly journals Stability and Adaptability of Yield among Earliness Sweet Corn Hybrids in West Java, Indonesia

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Dedi Ruswandi ◽  
Yuyun Yuwariah ◽  
Mira Ariyanti ◽  
Muh Syafii ◽  
Anne Nuraini
Keyword(s):  
Sweet Corn ◽  
Smallholder Farmers ◽  
West Java ◽  
Corn Hybrids ◽  
Stability Parameters ◽  
The Stability ◽  
On Farm ◽  
Main Effects ◽  
Gge Biplots ◽  
Corn Hybrid

Multienvironment testing is an important phase to study the interaction of G × E and to select stable hybrids for a broad environment or for a specific environment. To study the interaction of G × E and the stability of earliness and yield of Indonesian new sweet corn hybrids under different locations and seasons in West Java, Indonesia, eighteen hybrids were evaluated in six environments in West Java, Indonesia, and were analysed using parametric and nonparametric stability models, additive main effects and multiplicative interaction (AMMI), and GGE biplots. Results showed that the most promising sweet corn hybrids including hybrids G5 (SR 24 x SR 17) and G11 (SR 31 x SR 17) were identified. The parametric and nonparametric stability parameters and ASV were complement to the AMMI and GGE biplots in selecting stable and adaptable hybrids in terms of earliness and yield. G5 was selected as a high-response hybrid for grain yield to Jatinangor (E1, E2), Lembang (E3, E4), and Wanayasa (E5, E6), as well as earliness to Jatinangor (E2), Lembang (E3, E4), and Wanayasa (E5, E6). G5 sweet corn hybrid, therefore, is suggested to be extensively evaluated on farm and produced for smallholder farmers in West Java, Indonesia.

EFFECTS OF PLANT DENSITY AND PLANTING DATE ON LEAF NUMBER AND SOME DEVELOPMENTAL EVENTS IN CORN

1976 ◽  
Vol 56 (3) ◽  
pp. 691-698 ◽  
Author(s):  
E. E. N. A. BONAPARTE ◽  
R. I. BRAWN
Keyword(s):  
Plant Density ◽  
Planting Date ◽  
Leaf Number ◽  
Planting Dates ◽  
Corn Hybrids ◽  
Grain Moisture ◽  
Linear Correlations

The effects of plant density on leaf number and some developmental events in four corn hybrids were studied in 1969 and 1970. Increase in plant density was accompanied by a decrease in leaf number, an increase in the periods from planting to tassel emergence and mid-silk, and an increase in grain moisture at harvest. High linear correlations between leaf number and these developmental events were obtained within the spacing environments. The effects of eight planting dates on leaf number and some developmental events were studied in 1970. Delayed planting was accompanied by changes in leaf number, with a significant increase in leaf number at the middle planting dates, a decrease in the periods from planting to tassel emergence and mid-silk, and an increase in grain moisture at harvest. Leaf number was highly significantly correlated with these developmental events within the planting date environments.

Sign in / Sign up

Export Citation Format

Share Document