Progrès dans la science et la technologie des cultures

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Estimation of Genetic Variability among Potato (Solanum tuberosum L.) genotypes at Bekoji, Southeastern Ethiopia

Nimona Fufa Hunde, Dasta Tsagaye Galalcha, Demis Fikre Limeneh

The experiment was conducted at Kulumsa Agricultural Research Center, Bekoji site during 2020-21. The experiment consisting of a total thirteen potato genotypes following randomized complete block design with three replications for analysis of variance, mean performance were computed. The analysis of genetic variance revealed that the sufficient variability were present in experimental material. The analysis of variance exhibited that most of the genotypes performed significantly (P≤0.05) variable for stem height, days to flowering, days to maturity, stem number, marketable tuber yield, and total tuber yield registering the significant genetic variability among the genotypes evaluated. Genotypic and phenotypic coefficient of variations ranged from 2.59 to 63.58 and 4.49 to 75.14% respectively in first season while, in second season also range from 3.01 to 48.03 and 4.26 to 51.57% respectively. The phenotypic coefficient of variance (PCV) was slightly higher in magnitude than genetic coefficient of variance (GCV) for most of the parameters revealing that influence of seasons in expression of the traits. The heritability estimates recorded to be high for the characters viz. stem number per plant, stem height, emergence day, maturity day, marketable tuber yield and total tuber yield ha-1,while moderate to high heritability values as stem number per plant, total yield and tuber dry matter contents. The highest to moderate genetic advance was recorded for the characters as marketable tuber yield, stem number, total tuber yield, stem height and tuber dry matter content revealed that both the season and genetic variance are operating in these traits. Promising genotypes with desirable traits could be recommended to produce new variety or use as parental lines for future breeding program.