Vol. 17 No. 2
Multivariate analysis of maize genotypes grown under waterlogging stress
Author(s): G. KUMAWAT, J. P. SHAHI, K. CHANDRA, M. K. CHOUDHARY, A. SINGAMSETTI AND G. K. KOLI
Abstract: The field experiment was conducted to identify the principal component among fifteen morphological traits of CIMMYT maize hybrids under excess moisture condition. Further, the study also aimed to provide an insight into future studies to select diverse genotypes of maize which could be utilized as parents in maize hybridization program. The study was conducted with 53 CIMMYT maize (Zea mays L.) genotypes along with two checks during kharif season, 2017 in an alpha lattice design at experimental field of Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India. Excess soil moisture stress was maintained at the knee-high stage (V6-V7) of maize and on seventh day draining out of excess water. The data of fifteen morphological traits were recorded and analyzed to find out principal component to reveal the diversity among the genotypes under excess soil moisture stress. It was noted that the first five principal components exhibited more than one eigen values and accounted for 71.97 per cent of the total variation that comprised of 30.97 (PC 1), 14.58 (PC 2), 11.72 (PC 3), 8.09 (PC 4) and 6.61 (PC 5). The genotypes ZH17496 along PCA I axis and ZH17504 along PCA II axis identified on extreme positive side on both the axis were considered to be the best genotypes. These genotypes might be exploited in future hybridization programs. PC1 contributed the maximum towards the total variability (30.97). The characters viz., surface roots, brace roots, days to anthesis and plant population explained the maximum variance in PC1.This study helps in characterizing, reducing redundancy in the data set and assessing diversity among genotypes studied under waterlogging conditions.
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