Sweet Corn Hybrids Research Articles

Significance of application timing, formulation, and cytochrome P450 genotypic class on sweet corn response to dicamba

AbstractSweet corn (Zea mays L.) tolerance to dicamba and several other herbicides is due to cytochrome P450 (CYP)-mediated metabolism and is conferred by a single gene (Nsf1). Tolerance varies by CYP genotypic class, with hybrids homozygous for functional CYP (Nsf1Nsf1) being the most tolerant and hybrids homozygous for mutant CYP alleles (nsf1nsf1) being the least tolerant. The herbicide safener cyprosulfamide (CSA) increases tolerance to dicamba by stimulating the expression of several CYPs. However, the extent to which CSA improves the tolerance of different sweet corn CYP genotypic classes to dicamba is poorly understood. Additionally, the effect of growth stage on sweet corn sensitivity to dicamba is inadequately described. The objective of this work was to quantify the significance of application timing, formulation, and CYP genotypic class on sweet corn response to dicamba. Hybrids representing each of the three CYP genotypes (Nsf1Nsf1, Nsf1nsf1, nsf1nsf1), were treated with dicamba or dicamba + CSA at one of three growth stages: V3, V6, or V9. Across all timings, the nsf1nsf1 hybrid was the least tolerant to dicamba, displaying 16% higher crop injury levels 2 wk after treatment and 2,130 kg ha−1 lower ear mass yields compared with the Nsf1Nsf1 hybrid. The V9 growth stage was the most susceptible time for dicamba injury regardless of genotypic class, with 1.89 and 1,750 kg ha−1 lower ear mass yields compared with the V3 and V6 application timings, respectively. The addition of CSA to dicamba V9 applications reduced the injury from dicamba for all three genotypic classes; however, it did not eliminate the injury. The use of Nsf1Nsf1 or Nsf1nsf1 sweet corn hybrids along with herbicide safeners will reduce the frequency and severity of injury from dicamba and other CYP-metabolized herbicides.

Assessment of Acacia dealbata as green manure and weed control for maize crop

AbstractAcacia dealbata Link is one of the main invasive species in southwestern Europe and a resource with potential value for agriculture. Our objective was to assess the value of A. dealbata vegetative aerial biomass used as green manure and as a tool for weed control in maize crops through three sequential experiments. In 2017, an experiment was carried out with acacia green manure vs inorganic fertilization of pots sown with a field corn and a sweet corn hybrid with strong and weak nutrient demand, respectively. Nutrients were not released from acacia green manure at an appropriate timing, and maize suffered nutrient deficit. In 2018, a pot experiment was made outdoors incorporating acacia green manure at different times before maize sowing, and we found that a 4-month period was required for maximum nutrient release from acacia green manure. In 2019, an early and a late-field experiments were performed by incorporating acacia green manure 4 months before maize sowing. Physiological and agronomic data were recorded in maize, along with soil data, for all years, and weed data the last year. Altogether, most effects and interactions between genotype or environment and fertilization treatment were not significant, and some deficiencies caused by acacia green manure fertilization depend on genotype and environment. Incorporation of acacia green manure 4 months before maize sowing partially controlled weeds and replaced inorganic fertilization. However, deficiencies should be corrected with additional weed control practices and fertilization treatments, according to the nutrient demand of the crop and the soil environment.

Phule Madhu - A Single Cross Sweet Corn Hybrid for Maharashtra

Phule Madhu (QMHSC-1182), a single cross sweet corn hybrid from public sector in Maharashtra is developed from the cross between QMISC-1407 x QMISC-1408 through hybridization method. It is high yielding, yellow flint grain at green cob stage and orange yellow shrunken at maturity, moderately resistant to Turcicum leaf blight, Maydis leaf blight, Charcoal rot and Fusarium stalk rot and resistant to Stem borer (Chilo partellus Sw.) in field condition. It is sweet in taste having brix reading 14.89 percent. The green cobs in dough stage are ready to harvest within 80-85 days and total maturity of the crop takes about 95-100 days. In various states and varietal trials, the sweet corn hybrid QMHSC-1182 consistently recorded best performance. The sweet corn hybrid QMHSC-1182 recorded 12864 Kg ha-1 green cob yield with husk, which was 42.70 percent higher than checks Madhuri (9015 Kg ha-1), 64.97 percent higher than Priya (7798 Kg ha-1) and 45.01 percent higher than WOSC (8871 Kg ha-1). It is superior for green fodder yield over the check Madhuri and Priya. The sweet corn hybrid is released under the name ‘Phulen Madhu’ for sweet corn growing area of Maharashtra in 2016

Performance evaluation of pre-release sweet corn hybrids under varying plant density and nutrient levels

Field experiment was conducted at the Department of Millets, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu during kharif 2019 to evaluate the performance of pre-release sweet corn hybrids under varying plant density and nutrient levels. The soil was sandy clay loam, low in available N, medium in available P and high in available K. The experiment was laid out in split-split plot design. In the main plot, two plant densities viz 60 cm x 20 cm and 60 cm x 15 cm, in the sub-plot, two nutrient levels viz 100 per cent RDF (120:60:45 NPK kg/ha) and 150 per cent RDF (180:90:68 NPK kg/ha) and in the sub-sub-plot, two pre-release sweet corn hybrids viz Nuzi 260 and Misthi were tried in three replications. Based on the results of experimentation it was found that among the sweet corn hybrids, NUZI 260 was the most promising hybrid under a spacing of 60 cm x 20 cm with application of 150 per cent recommended dose of fertilizer ie 180:90:68 NPK kg/ha.

Studying hybrids of sugar corn under the conditions of the foothill zone of the KBR

This work is devoted to the study of various hybrids of sweet corn of a new selection, recommended for cultivation in the conditions of the South of Russia. The objects of study were the first generation sweet corn hybrids: Spirit, Boston, Royalty, Vega and Overland, with maturation periods from 75 to 85 days. Sowing was carried out at the same time with reference to weather conditions and varied over the years of research. So in 2020, the sowing of all hybrids was carried out on April 25, and in 2021 it was possible to sow only on May 5. The productivity of sweet corn is highly dependent on the choice of grown hybrids, as well as growing conditions. Sweet corn seeds were purchased from trusted suppliers with a certificate of conformity. In all hybrids, under conditions of sufficient humidity, germination was high, which is explained by the simultaneity of seedlings and high germination energy. Later, getting into different growing conditions during the growing season, the shape of plants, the area of leaves, and the yield of cobs changed. The yield of commercial cobs of the studied sweet corn hybrids is closely related to their biometric parameters. The Vega and Overland hybrids showed the highest increments in the yield of commercial cobs and exceeded the control by 3.8 and 4.9 t/ha or by 18 and 23%. Hybrid Spirit, which was the control variant, showed the lowest yield. This is due to the fact that other studied hybrids are more adapted to the soil and climatic conditions of this zone.

УРОЖАЙНІСТЬ ГЕТЕРОЗИСНИХ ГІБРИДІВ КУКУРУДЗИ ЦУКРОВОЇ З ФАО 280–290 В УМОВАХ ПРАВОБЕРЕЖНОГО ЛІСОСТЕПУ

Change in climatic conditions are is reality the reality of our days. She is accompanied by an increase in air temperature and changes in precipitation. However, in such conditions it is necessary to have sweet corn hybrids that will provide high yields. The spread of sweet corn hybrids is due to the use of its freshly cooked products in the summer. However, the demand for products is constantly increasing for both frozen and canned corn. Therefore, the main guarantee of obtaining a future harvest is the correct choice of a hybrid for cultivation, taking into account soil and сlimatiс conditions. The tests were conducted in the experimental field of Uman NUH in the conditions of the Right-Bank Forest-Steppe in 2021. New maize hybrids (obtained from maternal lines with different mutant genes) were used as test material. Number of studied hybrids – 4. Hybrid Spokusa was used as a standard. During the entire growing season, they were examined for the duration of the growing season and a number of morphological characteristics such as plant height and attachment height of the productive ear. The above listed signs are precisely the genetic feature of the hybrids and their response to changes in air temperature and precipitation. Our research made it possible to isolate a hybrid of corn 1290 (subject to the presence of su1se1 genes in the hybrid genotype), which is attributed to the middle-early ripeness group, and is also characterized by an average plant height of 220 cm and an average ear attachment height permissible for mechanized harvesting – 60 cm. seed productivity at the level of 4.9 t/ha and is characterized by high resistance to damage by corn motile.

Uticaj kuvanja na sadržaj karotenoida i tokoferola kod kukuruza šećerca

Taste and nutritional value make sweet corn a valued plant and an important component of the human diet worldwide. Kernel nutritive composition of sweet corn has been reported in various papers, but a description of carotenoid and tocopherols profile, especially after cooking is scarce. Therefore, the present study was carried out to compare the carotenoid and tocopherol content in sweet corn before and after cooking. Contents of b-carotene, lutein+zeaxanthin and tocopherols (d-T, b+g-T, a-T) in the kernels of twelve sweet corn hybrids were determined by High-Performance Liquid Chromatography (HPLC) and were expressed as the mean value of three independent measurements. Both genotype and cooking affected the content of the carotenoids and tocopherols in the kernel. The highest content of total carotenoids before and after cooking was found in hybrid ZP486/1su (27.77/45.28 µg/g) whereas the lowest content was in hybrid ZP 355su (10.27 µg/g) before cooking i.e. in hybrid ZP 347su (24.55 µg/g) after cooking. The cooking resulted in a significant increase in the content of total carotenoids and tocopherols, lutein+zeaxanthin, and b-carotene in all hybrids, except the ZP504su in which the b-carotene content decreased. An increase in a-tocopherol after cooking was observed in hybrids ZP485/1su and ZP484/1su, while a decrease was in hybrids ZP481/1su, ZP486/1su and ZP477/2su. The results showed that increasing micronutrient content is genotype-dependent. This study confirmed that cooking increases the nutritional value of sweet corn and gives it additional value in terms of functional food.

Genetic potential of tropical sweet corn hybrids and combining ability among parental inbred lines

Superiority of sweet corn (Zea mays L. saccharata) hybrid varieties is reflected by their performance per se, heterosis they reveal and combining ability of their inbred parents. This study was conducted to investigate performance, combining ability, heterosis and heritability revealed by 15 F1 tropical sweet corn hybrids from a half-diallel cross involving six diverse inbred lines, at two locations in Malaysia. At each location, the hybrids were evaluated for ear yield and yield components in a randomised complete block design, in comparison with their inbred parents and a commercial hybrid variety Hybrid 530 as control. Hybrids H11, H12 and H15 were found to be the most superior for yield and yield components, hence could be further tested in large-scale trials before release. Inbred lines FTT-1, EE0-2 and HAW-1 showed high positive GCA effects for yield and yield-related traits at both locations. Cross combinations HAV-2 × NTS-2, HSE-4 × NTS-2, NTS-2 × EE0-2 and EE0-2 × HAW-1 revealed high positive SCA effects for fresh ear yield and yield related traits at both location. Crosses among unrelated lines were found to produce superior hybrids. Both additive and non-additive gene effects were found important, although additive effects were predominating. The hybrids revealed substantially high heterosis, the highest being for number of ears per hectare and ear height. Moderate to high broad- and narrow-sense heritabi1ity estimates were displayed by the different traits measured

Historical Trends in Sweet Corn Plant Density Tolerance Using Era Hybrids (1930-2010s).

Over the last six decades, steady improvement in plant density tolerance (PDT) has been one of the largest contributors to genetic yield gain in field corn. While recent research indicates that PDT in modern sweet corn hybrids could be exploited to improve yield, historical changes in PDT in sweet corn are unknown. The objectives of this study were to: (a) quantify the extent to which PDT has changed since introduction of hybrid sweet corn and (b) determine the extent to which changes over time in PDT are associated with plant morpho-physiological and ear traits. An era panel was assembled by recreating 15 sugary1 sweet corn hybrids that were widely used at one time in the United States, representing hybrids since the 1930s. Era hybrids were evaluated in field experiments in a randomized complete block design with a split-plot arrangement of treatments, including hybrid as the main factor and density as the split-plot factor. Plant density treatments included “Low” plant density (9,900 plants/ha) free of crowding stress or “High” plant density (79,000 plants/ha) with crowding stress. On average, per-area marketable ear mass (Mt/ha) increased at a rate of 0.8 Mt/ha/decade at High densities, whereas per-plant yield (i.e., kg/plant) remained unchanged over time regardless of the density level. Crate yield, a fresh market metric, improved for modern hybrids. However, processing sweet corn yield metrics like fresh kernel mass and recovery (amount of kernel mass contributing to the fresh ear mass) showed modest or no improvement over time, respectively. Modern sweet corn hybrids tend to have fewer tillers and lower fresh shoot biomass, potentially allowing the use of higher plant density; however, plant architecture alone does not accurately predict PDT of individual hybrids.

Selecting experimental super sweet corn hybrids based on selection index

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.

Determination of The Effect of Different Plant Densities and Nitrogen Doses on Agronomical Traits of Sweet Corn (Zea mays saccharata Sturt.) In Conditions of The Northern-East Transitional Region Conditions of Turkey

This study was carried out to determine the differences in yield and quality characteristics of different plant density and nitrogen doses in sweet corn (Zea mays L. saccharata Sturt) during 2017 and 2018 years. This research was conducted according to a split-plot design with three replications in the Bingol University Faculty of Agriculture Application and Research Farm. Vega sweet corn hybrid was measured with three intra-row spacing (15, 20, 25 cm) and five pure nitrogen doses (0, 80, 160, 240, 320 N kg ha-1) were grown. In the study, the increasing nitrogen dose showed a significant rise in number of ears per plant , number of kernels per ear, relative chlorophyll content, water-soluble solids content, and fresh ear yield . It was determined that plant density positievly effected fresh ear yield; but the number of kernels per ear, the number of ears per plant, relative chlorophyll content were decreased. The highest fresh ear yield was determined D15 (13106 kg ha-1) in terms of plant density and N3 (15905 kg ha-1) in terms of nitrogen dose according to the combined experiment years analysis. Considering the average of years, 240 N kg ha-1 (N3) and approximately 100000 plants per hectare (S15) for optimum the fresh ear yield fertilizer application are recommended.

The Application of Phytohormones as Biostimulants in Corn Smut Infected Hungarian Sweet and Fodder Corn Hybrids.

The main goal of this research was to investigate the effects of corn smut (Ustilago maydis DC. Corda) infection on the morphological (plant height, and stem diameter), and biochemical parameters of Zea mays L. plants. The biochemical parameters included changes in the relative chlorophyll, malondialdehyde (MDA), and photosynthesis pigments’ contents, as well as the activities of antioxidant enzymes—ascorbate peroxidase (APX), guaiacol peroxidase (POD), and superoxide dismutase (SOD). The second aim of this study was to evaluate the impact of phytohormones (auxin, cytokinin, gibberellin, and ethylene) on corn smut-infected plants. The parameters were measured 7 and 11 days after corn smut infection (DACSI). Two hybrids were grown in a greenhouse, one fodder (Armagnac) and one a sweet corn (Desszert 73). The relative and the absolute amount of photosynthetic pigments were significantly lower in the infected plants in both hybrids 11 DACSI. Activities of the antioxidant enzymes and MDA content were higher in both infected hybrids. Auxin, cytokinin, and gibberellin application diminished the negative effects of the corn smut infection (CSI) in the sweet corn hybrid. Phytohormones i.e., auxin, gibberellin, and cytokinin can be a new method in protection against corn smut.

Economic optimum plant density of sweet corn does not increase root lodging incidence

AbstractExploitation of plant density tolerance in sweet corn (Zea mays L.), including the use of density‐tolerant hybrids at plant densities that optimize economic returns (hereafter called economic optimum plant density), has the potential to improve profitability. Multiple experimental approaches, including artificially created root lodging events in field trials and natural root lodging events in growers’ fields, were used to determine if economic optimum plant densities, compared with current plant densities, increase incidence of root lodging in sweet corn. An artificially created root lodging experiment over multiple years showed the environment in which sweet corn is grown is far more important to the effects of root lodging than plant density. In trials with natural root lodging events, results showed commercial sweet corn hybrids differed greatly in their susceptibility to root lodging, with some cultivars tolerant across all plant densities. Across 16 experimental comparisons of sweet corn response to plant density where natural root lodging was observed, including seven environments and 11 commercial hybrids, there was no difference in root lodging between current and economic optimum plant densities. Factors other than plant density dominate the crop's potential for, and recovery from, root lodging in growers’ fields, namely, the hybrid and the environment in which the crop is grown.

Combined Application of Biochar and Lime Increases Maize Yield and Accelerates Carbon Loss from an Acidic Soil

Biochar, an ecologically friendly soil amendment, is suggested for large-scale field application for its multiple potential benefits, including carbon sequestration, crop yield improvement, and the abatement of greenhouse gas emissions. However, it is unknown how effective it is in changing soil properties and its associated yield improvement when biochar is co-applied with lime in acidic soil. Here, we examined the effects of two different biochars, i.e., rice husk biochar (RHB) and oil palm empty fruit bunches biochar (EFBB), and lime on nutrient availability, the yield of maize, and soil CO2 emission of acid soil. Biochars were applied at two different rates (10 and 15 t ha−1) in combination with two rates of lime (100% and 75%), while the recommended rate of NPK fertilizers, 100% lime, and without any amendments (control) were also included. Hybrid sweet corn was grown in pots with 20 kg soils for 75 days. Plant performance and soil analyses were performed before and after crop maize cultivation while CO2 emission was recorded. Compared to the control, combined RHB biochars with lime significantly buffered soil pH and increased nutrient availability (e.g., P by 137%), while reducing Al and Fe concentration at harvest. These changes in soil properties significantly increased maize yield (by 77.59%) and nutrient uptake compared to the control. Between the two biochars, RHB was relatively more effective in making these changes than EFBB. However, this treatment contributed to a greater carbon loss as CO2 (209% and 145% higher with RHB and EFBB) from soil than the control. We believe that biochar-mediated buffering of soil pH is responsible for this change. Our results suggest that combined biochar application could bring desirable changes in soil properties and increase crop performance, although these effects can be short-lived.

Inbred and hybrid sweet corn genotype performance in diverse organic environments

AbstractThe value of selection in conventional breeding trials of cultivars destined for organic systems depends on the correlation between systems and relative heritability of key traits. Genotype × environment interaction is a common phenomenon in plant breeding trials. Thus, multiple‐environment testing to identify stable genotypes is a high priority for organic systems. In addition, because organic systems have limited inputs to buffer the environment, they may have greater spatial heterogeneity, which may be better accounted for by additional spatial blocking terms beyond traditional randomized complete‐block design. Over 2 yr, we evaluated 100 hybrid and 40 inbred sweet corn (Zea mays L.) genotypes in 11 trials in organic systems across six locations and evaluated the addition of augmented incomplete block and row–column design to estimate the performance of sweet corn genotypes. Hybrids differed in their performance for all tested traits. Inbred parents differed in per se performance and general combining ability for all traits. For the hybrid entries, modeling spatial factors beyond the replicated complete blocks improved the model fit for days to anthesis, plant height, ear height, husk protection, ear width, and ear length. For inbred entries, modeling spatial factors beyond the replicated complete blocks improved ∖ model fit for plant height, ear height, tenderness, and ear width. Wricke's ecovalence (W2i) was a useful measure of stability, correlating reasonably well with two of the three stability statistics considered in this analysis. Based on Wricke's ecovalence, some inbred parents were more stable than others across tested environments in their combining ability for all traits.

Transcriptional analysis of sweet corn hybrids in response to crowding stress.

Crop tolerance to crowding stress, specifically plant population density, is an important target to improve productivity in processing sweet corn. Due to limited knowledge of biological mechanisms involved in crowding stress in sweet corn, a study was conducted to 1) investigate phenotypic and transcriptional response of sweet corn hybrids under different plant densties, 2) compare the crowding stress response mechanisms between hybrids and 3) identify candidate biological mechanisms involved in crowding stress response. Yield per hectare of a tolerant hybrid (DMC21-84) increased with plant density. Yield per hectare of a sensitive hybrid (GSS2259P) declined with plant density. Transcriptional analysis found 694, 537, 359 and 483 crowding stress differentially expressed genes (DEGs) for GSS2259P at the Fruit Farm and Vegetable Farm and for DMC21-84 at the Fruit Farm and Vegetable Farm, respectively. Strong transcriptional change due to hybrid was observed. Functional analyses of DEGs involved in crowding stress also revealed that protein folding and photosynthetic processes were common response mechanisms for both hybrids. However, DEGs related to starch biosynthetic, carbohydrate metabolism, and ABA related processes were significant only for DMC21-84, suggesting the genes have closer relationship to plant productivity under stress than other processes. These results collectively provide initial insight into potential crowding stress response mechanisms in sweet corn.

English

English

Classical and genomic prediction of hybrid sweet corn performance in organic environments

AbstractPlant breeders need efficient systems to identify which inbreds to combine to create new hybrid cultivars. The North Carolina Design II (NC DII) is a useful mating design to evaluate the potential of hybrid varieties and their inbred parents. Genomic best linear unbiased prediction (GBLUP) models, either with or without the inclusion of a dominance term in the model, have been found to be an efficient method for using rich marker sets for prediction. This study used marker data and phenotypic data collected in 11 organic trials across six locations on 40 inbred sweet corn (Zea mays L.) genotypes and 100 hybrid progenies formed from four disconnected NC DII mating blocks to predict performance of untested sweet corn hybrids. In 2017, validation trials of 24 previously untested hybrids were grown in five organic environments to assess the correlation between actual performance and the performance predicted by GBLUP or NC DII general combining abilities (GCAs). Fivefold cross‐validation accuracy ranged from 0.29 to 0.82 for the GBLUP predictions based on additive effects alone (GBLUP‐A) and from 0.70 to 0.91 for GBLUP predictions based on combined additive and dominance effects (GBLUP‐AD). For all traits except flavor, addition of dominance effects to the model increased the cross‐validation accuracy. Correlations between values measured in the 2017 validation trials and values predicted from the 2015 and 2016 training trials ranged from 0.36 to 0.92 for GCA‐based predictions, from 0.34 to 0.94 for the additive GBLUP model, and from 0.38 to 0.92 for the additive plus dominance GBLUP model.

Development of multinutrient-rich biofortified sweet corn hybrids through genomics-assisted selection of shrunken2, opaque2, lcyE and crtRB1 genes.

Sweet corn has gained worldwide popularity. Traditional sweet corn possesses low concentration of essential nutrients such as lysine (0.15-0.25%), tryptophan (0.03-0.04%) and provitamin-A (proA 3-4 ppm), and deficiency leads to serious health problems in humans. Here, stacking of shrunken2 (sh2), opaque2 (o2), lycopene epsilon cyclase(lcyE) and β-carotene hydroxylase(crtRB1) genes were undertaken in the parents of four hybrids viz., APQH1, APHQ4, APHQ5 and APHQ7 using marker-assisted backcross breeding (MABB). Gene-linked markers (umc2276 and umc1320) for sh2, while gene-based markers for o2 (umc1066 and phi057), lcyE (5'TE-InDel) and crtRB1 (3'TE-InDel), were used for genotyping in BC1F1, BC2F1 and BC2F2. Selected backcross progenies showed high recovery of recurrent parent genome (92.4-97.7%). The reconstituted sweet corn hybrids possessed significantly high lysine (0.390%), tryptophan (0.082%) and proA (21.14 ppm), coupled with high kernel sweetness (brix 18.96%). The improved sweet corn hybrids had high cob yield (12.22-15.33 t/ha) across three environments. These newly developed biofortified sweet corn hybrids possess great significance in providing balanced nutrition. This is the first report of combining sh2, o2, lcyE and crtRB1 genes for enrichment of sweet corn hybrids with multiple essential nutrients.

Agronomic performance of experimental super sweet corn hybrids

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.