Correlation and path analysis studies in onion (Allium cepa) genotypes

YOGITA; RAMESH KUMAR; DAVINDER SINGH; KALPANA YADAV; SRISHTI; ANIL KUMAR ROHILA; AJAY KUMAR; NIDHI TYAGI; AMIT KUMAR

doi:10.56093/ijas.v93i3.132162

Authors

YOGITA Maharana Pratap Horticultural Universitiy, Karnal, Haryana
RAMESH KUMAR Dr. Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh
DAVINDER SINGH Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana
KALPANA YADAV Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana
SRISHTI Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya, Palampur, Himachal Pradesh
ANIL KUMAR ROHILA Chaudhary Charan Singh Haryana Agricultural University, Extension Education Institute, Karnal, Haryana
AJAY KUMAR Chaudhary Charan Singh Haryana Agricultural University, Krishi Vigyan Kendra, Jhajjar, Haryana
NIDHI TYAGI Dr. Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh 173 230, India
AMIT KUMAR Shree Guru Gobind Singh Tricentenary University, Chandu-Budhera, Gurugram, Haryana.

https://doi.org/10.56093/ijas.v93i3.132162

Keywords:

Correlation, Genetic variability, Path analysis, Yield

Abstract

The present study was carried out at the experimental farm of the Department of Vegetable Sciences, Dr. Yashwant
Singh Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh during the winter (rabi) season of 2019–20 and 2020–21 to study the genetic variability, correlation and path studies in 30 different genotypes of the onion (Allium cepa L.) crop. All genotypes reflected a wide and significant spectrum of variability for all the traits under study. Genotypes UHF-ONI-13, UHF-ONI-15 and UHF-ONI-16 outperformed other genotypes in terms of yield and other critical horticultural characteristics. The magnitude of phenotypic coefficient of variation was higher than the genotypic coefficient of variation for all the characters. The phenotypic and genotypic coefficients of variability were high for doubles/deformed bulbs, moderate for leaf length, plant height, average bulb weight, bulb yield per plot and per hectare. High heritability along with high to moderate genetic gain was observed for doubles/deformed bulbs, leaf length, plant height, average bulb weight, bulb yield per plot and bulb yield per hectare, which suggested that improvement can be achieved through simple selection. Bulb yield had significant and positive correlation with average bulb weight, equatorial diameter, plant height, polar diameter, days to harvest and days to 50% neck fall. Path analysis showed that bulb weight, equatorial diameter, bulb shape index, neck thickness, total soluble solids, plant height and leaf length had a positive direct effect on bulb yield.

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