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2024, Vol. 22, No. 3

Selle kollektsiooni püsiv URIhttp://hdl.handle.net/10492/9520

Sirvi

Sirvi 2024, Vol. 22, No. 3 Autor "Dikhtiar, I." järgi

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    Kirje
    Phylogenetic diversity and relationships among sorghum genotypes of breeding collection
    (Estonian University of Life Sciences, 2024) Honcharov, Y.; Yalanskyi, O.; Prysiazhniuk, L.; Dikhtiar, I.; Melnyk, S.; Hryniv, S.; Tahantsova, M.; Holichenko, N.
    Sorghum is gaining prominence as a biofuel crop, currently taking the position as the second-largest source of grain-based ethanol after maize. Estimation of genetic diversity to identify groups with similar genotypes is important for conserving, evaluating and utilizing genetic resources. This study aimed to evaluate the genetic diversity and population structure in different genotypes of sorghum collection for breeding purposes to improve cultivars. There were investigated thirty-one sorghum genotypes of different origin. The genetic diversity of sorghum genotypes was assessed by five SSR markers. To evaluate morpho-agronomical traits, days to flowering, plant high, 1,000 seeds weight and yield were studied. As the result of analysis, four cluster groups were formed based on Roger’s & Tanimoto dissimilarity. These cluster groups included from three to sixteen sorghum genotypes, one genotype K2105 formed the separate cluster. The Shannon index calculated based on SSR markers was 1.99. Two principal components explained approximately 63% of the total variance. The greatest effect of year weather conditions was observed on the trait ‘days to flowering’. The plant height was affected by the genotype of grain sorghum. The yield and 1,000 seed weight were affected by weather conditions, but the impact rate was significantly lower than the effect of days to flowering. The correlation between SSR markers and trait ‘days to flowering’ based on distances matrices was weak, but significant (r = 0.1). Thus, obtained results can be utilized for revealing genetic variation and identifying slightly different genotypes in a sorghum breeding program.