Correlation of morphometric features of broom sorghum

Relevance. Sorghum is a unique plant species, both in terms of its biological characteristics and its economic value. The main purpose of broom sorghum (also known as technical sorghum) is to produce brooms and brushes. The grain, when crushed, is a high-quality concentrated feed, while the leaves and stems are used for silage. To improve the efficiency of breeding, it is important to consider the correlations between the various characteristics of the crop. Our research aims to study the vegetative, generative, and structural characteristics of sorghum, as well as to analyze the moderate and strong correlations between these characteristics.

Methods. The objects of the study were 27 samples of broom sorghum, which were grown 
during 2022–2024 on the experimental field of the Russian Research Institute of Sorghum 
and were evaluated in accordance with generally accepted recommendations and methods.

Results. The variability of the main morphological features of broom sorghum was established. A factor analysis was conducted on 8 features and 27 varieties. Strong and medium correlations were identified, as well as the features that contribute the most to the accumulated variance. The first hypothetical factor accounts for 32,26% (the highest value is for the features: the prominence of the panicle stem, the area of the flag leaf, and the largest leaf).

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