Genetic variability and character associations in vetiver (Vetiveria zizanioides L. Nash)
2013
Lal, R.K. | Gupta, P. | Gupta, V. | Sarkar, Shondeep L. | Singh, S.
Forty genetic stocks of vetiver (Vetiveria zizanioides L. Nash) were screened for high oil yield. The considerable amount of natural and genetic variability in morpho-metric traits was recorded. The estimate of heritability (^h2BS %) and corresponding genetic advance (GA), both were high for plant height (^h2BS %=98.48 and GA=64.83). Genetic (G) and phenotypic (P) associations coefficients among the seven traits indicated that plant height was highly and significantly correlated with tillers/plant (0.399**G, 0.389**P); fresh root with dry root yield (0.905**G, 0.769**P) and oil content with oil yield (0.397**G, 0.390**P) at both genotypic and phenotypic level. The plant height with root length was also positively correlated with each other at both genetic (G) and phenotypic (P) levels (0.282*G, 0.278*P). The path coefficient under study revealed that the highest direct contribution to total oil yield was made by fresh root yield (0.514) followed by oil content (0.386), tillers/plant (0.149) and root length (0.086) in percent.
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