Quantitative and qualitative yield in sweet maize hybrids.

Area of Science:

• Agricultural Science
• Plant Breeding
• Nutritional Biochemistry

Background:

• Sweet corn is a valuable vegetable crop, prized for its high sugar and low starch content.
• Understanding genetic variation in sweet corn hybrids is crucial for optimizing yield and nutritional quality.
• Key nutritional components like sugars, minerals, and carotenoids influence overall quality and health benefits.

Purpose of the Study:

• To analyze yield variations among different sweet corn hybrids.
• To investigate the relationship between nutritional factors (sugars, minerals, carotenoids) and yield indices.
• To identify specific hybrids excelling in particular yield or nutritional traits.

Main Methods:

• Cluster analysis and variance analysis were employed to assess yield index variations.
• Factor analysis and biplot analysis were used to explore correlations between nutritional components and yield.
• Performance of various hybrids (GB, DE, GS, SE, ME, NO, DB) was evaluated based on multiple parameters.

Main Results:

• Hybrids exhibited significant variations in yield indices, with some showing similar performance (GB, DE, GS).
• Sweet corn hybrids demonstrated stability in fructose, glucose, sucrose, and potassium content.
• Positive correlations were observed between yield indices and various minerals (calcium, iron, zinc, magnesium, phosphorus) and carotenoids (α-Carotene, 9Z-β-Carotene, β-carotene).
• Sugar content (fructose, glucose, sucrose) and potassium positively correlated with lutein, zeaxanthin, and β-Cryptoxanthin.
• Specific hybrids showed maximum performance for certain traits: ME for the first yield factor, NO for the second yield factor, SE for zeaxanthin, and GS for zinc, phosphorus, and iron. DB hybrid showed stability in dry matter.

Conclusions:

• Nutritional factors, particularly sugar content and potassium, are integral to sweet corn yield and the accumulation of health-beneficial compounds like zeaxanthin.
• Specific sweet corn hybrids possess unique profiles for yield potential and nutritional value, offering opportunities for targeted breeding.
• The study highlights the interconnectedness of various components, emphasizing a holistic approach to sweet corn quality assessment and improvement.