Genetic variability, analysis of genetic parameters, character associations and contribution for agronomical traits in turmeric (Curcuma longa L.)

•This is the unique study for genetic associations and character’s contribution in turmeric crop.•Genetic variation agro-morphological traits in sixty five germplasm are very high.•Genetic parameters indicated wide scope of selection for the improvement of these characters.•Dry weight of rhizome and...

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Bibliographic Details
Published in:Industrial crops and products 2015-12, Vol.76, p.204-208
Main Authors: Mishra, Ritu, Gupta, Anil Kumar, Lal, Raj Kishori, Jhang, Tripta, Banerjee, Nisha
Format: Article
Language:English
Subjects:
Correlations
Direct effects
Genetic advance
Path coefficient
Yield components
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Summary:•This is the unique study for genetic associations and character’s contribution in turmeric crop.•Genetic variation agro-morphological traits in sixty five germplasm are very high.•Genetic parameters indicated wide scope of selection for the improvement of these characters.•Dry weight of rhizome and its components were highly heritable with moderate to high level of genetic advance.•Contribution of characters (%) toward both primary axis and secondary axis was maximum for plants height and leaves length. Sixty-five germplasms of Curcuma longa L. were screened for high rhizome yield. The considerable amount of natural and genetic variability in thirteen agro-morphological traits was recorded. The estimate of broad sense heritability (^h2BS%) was high for plant height (99.05) and genetic advance (GA) for fresh weight of rhizome (201.02). Genotypic (G) and phenotypic (P) correlation coefficient among traits revealed that leaves width were highly significant and positively correlated with length of stipulated tuber (0.62**G, 0.48**P); dry weight of rhizome with thickness of stipulated tuber (0.98**G, 0.96**P) and fresh weight of rhizome with days to germination (0.97**G, 0.94**P). Fresh weight of rhizome exhibited highest PCV (38.18%) and GCV (33.16%). The path coefficient analysis revealed that the highest direct contribution to rhizome thickness was made by dry weight of rhizome (1.10). The direct contribution toward total rhizome yield was highest for dry weight of rhizome followed by length of stipulated tuber, respectively.
ISSN:0926-6690
1872-633X
DOI:10.1016/j.indcrop.2015.06.049