Agro-morphological characterization of Pakistani maize accessions using qualitative and quantitative traits

Area of Science:

• Agricultural Science
• Genetics
• Plant Breeding

Background:

• Agro-morphological characterization is crucial for germplasm evaluation in breeding programs.
• Understanding genetic variability within maize accessions is essential for developing improved cultivars.

Purpose of the Study:

• To assess genetic variability within 99 maize accessions and 5 check varieties using agro-morphological traits.
• To identify key traits contributing to genetic diversity in maize.

Main Methods:

• Field trials were conducted to evaluate 28 agro-morphological traits in maize accessions.
• Hierarchical cluster analysis and principal component analysis (PCA) were employed to analyze genetic diversity.

Main Results:

• Maximum variation was observed in grain weight per cob, number of kernels per row, and flag leaf area.
• Cluster analysis grouped accessions into 7 clusters, with Cluster II showing highest grain yield per cob.
• PCA indicated that grain weight per cob, kernel number per row, and 1000-grain weight were significant contributors to morphological variability.

Conclusions:

• Significant genetic diversity exists within the studied maize germplasm.
• Findings have implications for maize germplasm characterization, conservation, and breeding efforts.
• This study provides a basis for developing improved maize cultivars through targeted breeding strategies.