scholarly journals Agronomic performance of experimental super sweet corn hybrids

2021 ◽  
Vol 39 (2) ◽  
pp. 199-204
Author(s):  
Emanuel Gava ◽  
Marcos V Faria ◽  
Welton L Zaluski ◽  
Jocimar C Rosa ◽  
Elida AP Paiva ◽  
...  
Keyword(s):  
Sweet Corn ◽  
Starch Content ◽  
Soluble Solids ◽  
Sugar Accumulation ◽  
Agronomic Performance ◽  
Southern Brazil ◽  
Corn Hybrids ◽  
Sowing Season ◽  
Corn Inbred ◽  
Partial Diallel

ABSTRACT Super sweet is classified as a special type of corn, due to the presence of genes which promote sugar accumulation in grains, significantly reducing starch content in the endosperm. This study aimed to evaluate the agronomic performance of experimental super sweet corn hybrids, carrying the gene shrunken-2, in order to identify and select promising genotypes for Southern Brazil. The experiments were carried out in two sowing seasons in 2017/18, in the experimental field of UNICENTRO, Guarapuava-PR, Brazil. Thirty-two experimental hybrids resulting from an 8x4 partial diallel among super sweet corn inbred lines from four distinct populations were evaluated along with two commercial hybrids (BRS Vivi and Tropical Plus) used as checks. Traits of agronomic and commercial interest were evaluated: male flowering (MF), husk covering index (HCI), yield of husked ears (YHE), grain yield (GY), commercial prolificacy (CPR), percentage of commercial ears (PCE), color (COL) and soluble solids (SS) of the grains. We verified significant differences among the experimental hybrids, except for COL. There was no significant effect of sowing season regarding to SS. Genotypes x seasons interaction was significant for YHE, GY, CPR, PCE and COL. There are promising experimental hybrids showing performances superior to commercial super sweet corn hybrids used in Brazil. The experimental hybrids D2-61 x D5-41 and D3-10 x D5-43 were superior to the other experimental genotypes. The experimental hybrid D2-61 x D5-41 shows potential to meet the demands of the current super sweet corn market.

scholarly journals Selecting experimental super sweet corn hybrids based on selection index

2021 ◽  
Vol 39 (3) ◽  
pp. 279-287
Author(s):  
Welton Luiz Zaluski ◽  
Marcos V Faria ◽  
Jocimar C Rosa ◽  
Nathany R Chiquito ◽  
Gabriela S de Oliveira ◽  
...  
Keyword(s):  
High Performance ◽  
Sweet Corn ◽  
Selection Index ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Corn Hybrids ◽  
High Productivity ◽  
Sowing Season ◽  
Solids Content

ABSTRACT Super sweet corn hybrids shall present production and quality traits in order to meet farmer’s, industry and consumer’s expectations. The aim of this study was to select experimental super sweet corn hybrids based on the Z index (I Z ). We evaluated 64 experimental hybrids from crosses between inbred lines of different groups along with two check hybrids. The experiments were carried out in Guarapuava-PR in two sowing seasons in 2016. The evaluated traits were male flowering, ear length, ear diameter, soluble solids content, husked ear yield, unhusked ear yield, and grain yield. The traits which most contributed to the Z index were related to ear and grain yields and soluble solids content. The first sowing season was the most favorable for the expression of yield related traits. The experimental hybrid D3-30 x D5-46 showed high performance in both sowing seasons and the hybrid D2-17 x D5-46 stood out in the second sowing season, being both promising, showing high productivity and quality of ear, considering the Z index.

scholarly journals Selección de líneas para formar híbridos de maíz dulce ricos en lisina: II. Líneas.

2016 ◽  
Vol 9 (2) ◽  
pp. 61
Author(s):  
María Cristina Vega ◽  
Enrique Navarro ◽  
José Espinoza ◽  
José Luis Guerrero ◽  
Gustavo A. Burciaga
Keyword(s):  
Sweet Corn ◽  
Block Design ◽  
Plant Quality ◽  
Similar Response ◽  
Corn Hybrids ◽  
Flag Leaves ◽  
Grain Color ◽  
Partial Diallel

The Maize Mexican Institute "Dr. Mario E. Castro Gil" at Universidad Autónoma Agraria Antonio Narro has developed endogamic lines with a tendency to produce sweet corn hybrids whose germ plasrn ineludes both the sugary-2 and the opaque-2 genes responsible for Iysine and sugar contento Sixty-one single crosses were obtained from a partial diallel among twentytwo S5 lines (twenty of which were included in Experiment I. Testers); such single hybrids were evaluated using a randornized complete block design in two sites in Mexico during 1994. Agronornic performance of the hybrids produced through the partí al diaIlel was superior to the performance obtained from trial hybrids in Experiment I (line x tester), resulting in a greater precociousness, better plant quality, and longer ears. Overdorninance effects among the lines played an important role in the manifestation of such traits. Hybrids and test crosses showed a similar response on traits such as amount of marketabIe ears, ear quality, number of green flag leaves, and grain color. Based on the previously mentioned results, twenty single hybrids were selected which can be used for semicommercial purposes.

scholarly journals Selection of S3 progenies of super sweet corn based on agronomic performance of topcrosses

2021 ◽  
Vol 39 (4) ◽  
pp. 357-361
Author(s):  
Nathany R Chiquito ◽  
Marcos V Faria ◽  
Elida Auxiliadora P Paiva ◽  
Emanuel Gava ◽  
Welton L Zaluski
Keyword(s):  
Sweet Corn ◽  
Total Yield ◽  
Inbred Lines ◽  
Soluble Solids ◽  
Agronomic Performance ◽  
Soluble Solids Content ◽  
Commercial Yield ◽  
Solids Content ◽  
Topcross Hybrids ◽  
Selection Of

ABSTRACT The aim of this study was to select S3 progenies of super sweet corn based on agronomic performance, evaluated in topcrosses with the narrow genetic base tester Honey Sweeter (Seminis®). The experiment was carried out in Guarapuava-PR. We evaluated 22 topcross hybrids and three checks, in two sowing times, in randomized blocks design with three replications. Six traits were evaluated: total yield of husked ears, commercial yield of husked ears, grain yield, grain length, ear diameter and total soluble solids content. Considering the set of evaluated traits, the topcrosses with progenies D2-07, D3-28, D4-53 and D5-24 were superior to the others; therefore, these progenies should continue in the inbreeding process and be evaluated in crosses with elite inbred lines with potential to generate competitive super sweet corn single hybrids.

scholarly journals Agronomic performance of super-sweet corn genotypes in the north of Rio de Janeiro

2014 ◽  
Vol 14 (1) ◽  
pp. 8-14 ◽  
Author(s):  
Pedro Henrique Araújo Diniz Santos ◽  
Messias Gonzaga Pereira ◽  
Roberto dos Santos Trindade ◽  
Keila Silva da Cunha ◽  
Geovana Cremonini Entringer ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Sweet Corn ◽  
Northern Region ◽  
Agronomic Performance ◽  
Corn Hybrids ◽  
Breeding Lines ◽  
The North ◽  
Field Corn ◽  
Genetic Value ◽  
Single Cross Hybrids

We investigated the agronomic performance of super-sweet corn genotypes. Super-sweet corn genotypes were backcrossed with regionally adapted field varieties (CIMMYT 8 and Piranão 8). Eight morphological and yield-related traits were evaluated. A significant effect of interaction was observed between the five groups of genotypes (donor parents; super-sweet backcrossed parents; super-sweet intervarietal hybrids; common intervarietal corn hybrids; and field corn populations). Despite the low yield of genotype SH2Piranão, the hybrids resulting from interbreeding of the backcrossed parents for the improvement of super-sweet corn were promising. The agronomic performance of the super-sweet parents and their hybrids indicates the possibility of breeding lines with high genetic value to obtain single-cross hybrids and cultivars of super-sweet corn adapted to the northern region of the State of Rio de Janeiro.

scholarly journals Molybdenum dosage and application timing in sweet corn

2019 ◽  
Vol 13 (2) ◽  
pp. 219-227
Author(s):  
Arthur Bernardes Cecílio-Filho ◽  
Miguel Angel López-Aguilar ◽  
Sergio Manuel Rugeles-Reyes ◽  
Juan Waldir Mendoza-Cortez
Keyword(s):  
Sweet Corn ◽  
Agronomic Performance ◽  
Corn Hybrids ◽  
Application Timing ◽  
Grain Productivity ◽  
Productive Potential ◽  
Total Productivity ◽  
Foliar Concentration

Nowadays, there is a greater offer of sweet corn hybrids with a high productive potential, shorter cycle and more intense metabolism than common corn, resulting in this crop being very demanding in terms of nutrients. The present study aimed to evaluate the effect of three levels of molybdenum (Mo) (150, 300 and 450 g ha-1), via foliar spraying, with different  application timing (E1: 100% at 15 days after  emergence - DDE; E2: 100% at 30 DDE; E3: 100% at 45 DDE; E4: 50% at 15 and 30 DDE, and E5: 33.3% at 15, 30 and 45 DDE) on the agronomic performance of sweet corn ‘SVN 9298’. There was a significant effect from the interaction of the factors on the foliar concentration of Mo, obtaining the highest value with 450 g ha-1 of Mo, applied at 45 DDE, with an increase of 1.2% in the foliar content from that observed in the plants without a Mo application. Also, the foliar concentration of nitrogen (N) was higher with the highest Mo level. The highest number of commercial ears (49,583), total productivity of ears (20,942 kg ha-1) and productivity of commercial ears (13,211 kg ha-1) were obtained with estimated levels of 316, 450 and 311 g ha-1 of Mo, respectively. Likewise, the dose that maximized grain productivity (5,055 kg ha-1), which is the most important component that defines the agronomic performance of sweet corn, was  the estimated dose of 334 g ha-1 of Mo.

Identification of Field Corn Inbreds Adapted to Europe to Improve Agronomic Performance of Sweet Corn Hybrids

Crop Science ◽  
1997 ◽  
Vol 37 (4) ◽  
pp. 1134-1141 ◽  
Author(s):  
R. A. Malvar ◽  
M. E. Cartea ◽  
P. Revilla ◽  
A. Ordás
Keyword(s):  
Sweet Corn ◽  
Agronomic Performance ◽  
Corn Hybrids ◽  
Field Corn

scholarly journals Inheritance of Cross-sensitivity in Sweet Corn to Herbicides Applied Postemergence

2006 ◽  
Vol 131 (6) ◽  
pp. 744-751 ◽  
Author(s):  
Jerald K. Pataky ◽  
Jonathan N. Nordby ◽  
Martin M. Williams ◽  
Dean E. Riechers
Keyword(s):  
Sweet Corn ◽  
Recessive Gene ◽  
Acetolactate Synthase ◽  
Corn Hybrids ◽  
Cross Sensitivity ◽  
Herbicide Treatments ◽  
Positive Correlations ◽  
Corn Inbred ◽  
Postemergence Herbicides ◽  
Phenotypic Responses

Some sweet corn (Zea mays L.) hybrids and inbreds can be severely injured by applications of postemergence herbicides. An association was observed between the responses of sweet corn hybrids and inbreds to nicosulfuron and mesotrione, and F2 families derived from a cross of a sensitive (Cr1) and a tolerant (Cr2) sweet corn inbred segregated for response to these two herbicides. These observations prompted us to examine the inheritance of sensitivity in sweet corn to multiple postemergence herbicide treatments with different modes of action and to determine if there was a common genetic basis for cross-sensitivity to these herbicides. The sensitive and tolerant inbreds, progeny in the F1, F2, BC1, and BC2 generations, and BC1S1, BC2S1, F2:3 (S1:2) and F3:4 (S2:3) families were screened for responses to eight herbicide treatments. Based on segregation of tolerant and sensitive progeny and segregation of family responses, our data indicate that a single recessive gene in Cr1 conditioned sensitivity to four acetolactate synthase (ALS)-inhibiting herbicides (foramsulfuron, nicosulfuron, primisulfuron, and rimsulfuron), a 4-hydroxyphenylpyruvate dioxygenase (HPPD)-inhibiting herbicide (mesotrione), a growth regulator herbicide combination (dicamba + diflufenzopyr), and a protoporphyrinogen oxidase (PPO)-inhibiting herbicide (carfentrazone). Based on highly significant positive correlations of phenotypic responses among BC1S1, BC2S1, F2:3, and F3:4 families, the same gene (or closely linked genes) appeared to condition responses to each of these herbicide treatments. The dominant allele also conditions tolerance to bentazon [a photosystem II (PSII)-inhibiting herbicide] although another gene(s) also appeared to affect bentazon tolerance.

scholarly journals Partial diallel and potential of super sweet corn inbred lines bt 2 to obtain hybrids

2019 ◽  
Vol 37 (3) ◽  
pp. 278-284
Author(s):  
Larissa Fernanda S Xavier ◽  
Jéssica Kelly Pestana ◽  
Alline Sekiya ◽  
Matheus D Krause ◽  
Rosângela Maria P Moreira ◽  
...  
Keyword(s):  
Combining Ability ◽  
Sweet Corn ◽  
Block Design ◽  
Inbred Lines ◽  
Superior Performance ◽  
Breeding Programs ◽  
Randomized Block Design ◽  
Grain Productivity ◽  
Corn Inbred ◽  
Partial Diallel

ABSTRACT The aims of this study were to determine the potential of S4 super sweet corn inbred lines for hybrid synthesis, identify the predominant types of gene action and correlations among different traits, significant for breeding programs. The 81 hybrids obtained from a partial diallel 9x9 and three checks were evaluated. A complete randomized block design, with three replicates, and two sowing seasons was used. We could notice significant hybrid effects, general combining ability (GCA) of GI and GII groups and specific combining ability (SCA) in relation to evaluated traits, highlighting the existence of hybrids with superior performance and the expression of additive and non-additive effects. The inbred lines: L1, L3, L6 and L9 (GI) and L1’, L7’ and L9’ (GII) showed the best GCA and SCA estimates, being present in the nine selected hybrids with superior and competitive performance in relation to the checks. The estimated correlations indicate that, for a breeding program aiming to increase grain productivity, evaluating, at least, the dehusked ears, prioritizing genotypes with larger ear diameters and longer ear lengths is important.

scholarly journals Physico-chemical aspects of grape juices produced in the region of Campanha Gaucha, RS, Brazil (Southern Brazil)

2019 ◽  
Vol 12 ◽  
pp. 01018
Author(s):  
V.B. Costa ◽  
S.B. de Andrade ◽  
P.L.P.K. Lemos ◽  
A. Bender ◽  
C. Goulart ◽  
...  
Keyword(s):  
Grape Juice ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Southern Brazil ◽  
Color Intensity ◽  
Volatile Acidity ◽  
Physico Chemical ◽  
Increasing Demand ◽  
Solids Content ◽  
Grape Juices

The Campanha Gaucha region, southern Brazil, has received significant investments in Viticulture during the last decades, especially for the production of quality wines. However, implementing the production of American and hybrid grapes in this region constitutes and opportunity to supply the increasing demand of the grape juice market in Brazil. Juices of two varieties, “Bordô” and “Concord”, from two locations, Dom Pedrito and Santana do Livramento, were analysed in terms of the following physico-chemical aspects: total city, volatile acidity, density, pH, soluble solids content, color intensity, and hue. “Bordô” juices presented higher total acidity and did not differ in relation to location. Higher volatile acidity was found in “Concord” juice from Santana do Livramento. Higher pH was found in the variety “Concord” and in the location Dom Pedrito. For this same location, the “Concord” grape juices showed higher soluble solids values. Color intensity was higher in Santana do Livramento. Color hue was higher in Dom Pedrito. Both variety and location impacted significantly on physico-chemical aspects of grape juices, although all the grapes were produced within the Campanha Gaucha region.

scholarly journals Sweet Corn Research around the World 2015–2020

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 534
Author(s):  
Pedro Revilla ◽  
Calli M. Anibas ◽  
William F. Tracy
Keyword(s):  
Sweet Corn ◽  
Starch Content ◽  
Starch Synthesis ◽  
Environmental Care ◽  
Research Activities ◽  
The Us ◽  
The World ◽  
The Usa ◽  
Basic Biology ◽  
Endosperm Starch

Modern sweet corn is distinguished from other vegetable corns by the presence of one or more recessive alleles within the maize endosperm starch synthesis pathway. This results in reduced starch content and increased sugar concentration when consumed fresh. Fresh sweet corn originated in the USA and has since been introduced in countries around the World with increasing popularity as a favored vegetable choice. Several reviews have been published recently on endosperm genetics, breeding, and physiology that focus on the basic biology and uses in the US. However, new questions concerning sustainability, environmental care, and climate change, along with the introduction of sweet corn in other countries have produced a variety of new uses and research activities. This review is a summary of the sweet corn research published during the five years preceding 2021.

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