GENETIC VARIATION AND ASSOCIATIONS BETWEEN SOME AGRONOMIC, CHEMICAL SEED COMPONENTS AND SEEDLING VIGOR CHARACTERS IN SOME COTTON VARIETIES
Abstract: Agronomic and seed chemical characters of cottonseed play a prime role in seedling vigor establishment for cotton plant to obtain the maximum stand and better growth. Nutritional components in the seed play a very important role in early seedling developmental stage to produce healthy plants. The present study was conducted to investigate the genetic variability and relationship among agronomic, chemical components and seedling vigor characters of eight Egyptian cotton varieties (Gossypium barbadense) classified into two categories according to their fiber quality properties (long and extra long staple). The results showed highly significant genotypic variation for all the studied characters, which reflect the genotypic variability between the studied genotypes. Broad sense heritability ranged from moderate to high values for all the studied characters. Genetic divergence (D 2 ) showed highly significant dissimilarity between the two categories of Egyptian cotton varieties, except between the extra-long staple category. There was a highly significant and positive association between protein content and seed volume, lint index and seed index, also between oil content and carbohydrate content (0.583). While, seed oil percentage was not correlated with seed properties except lint percentage and a highly significant and negative correlation between seed protein and oil content. Most of the studied characters showed highly significant dissimilarity coefficients between and within these studied characters, which reflect the genetic variation background of these genotypes. Significant positive correlation and dissimilarity coefficients among and within these studied characters suggest that selection may be useful for the enhancement of the correlated characters.
Publication year 2015
Pages 390-399
Organization Name
Author(s) from ARC
Publication Type Journal
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