Factor analysis for yield contributing traits in maize (Zea mays L.)

  • B. Bharathiveeramani and M. Prakash
Keywords: Maize, Factor analysis, Principal components and varimax rotation


Data collected on 17 traits from 144 inbred lines derived using 4 different base populations of unknown pedigree were
subjected to factor analysis. Sixteen factors were extracted using principal component analysis as extraction method. Out of
16, only 5 factors had eigen value greater than one and these factors alone accounted for 78.3% of total variance. The
loadings of each variable onto each factor was analysed from the rotated factor matrix obtained through varimax rotation.
First factor accounted for 22.93% of the total variation and showed significant associations of traits related to duration
namely days to 50% tasseling, days to 50% silking, anthesis silking interval and days to maturity. Second factor with
19.22% of total variation had higher loadings of plant height and ear height which are the important growth traits in maize.
Factor 3 with a contribution of 17.91% to total variation was found to be significantly associated with the important yield
traits viz. cob yield/plant, grain yield/plant and ear girth. Factor 4 (9.99% variance) and factor 5 (8.33% variance) were
loaded mainly with hundred seed weight and grain setting length respectively.
How to Cite
M. Prakash, B. B. and. (2012). Factor analysis for yield contributing traits in maize (Zea mays L.). Electronic Journal of Plant Breeding, 3(4), 998 - 1001. Retrieved from http://ejplantbreeding.org/index.php/EJPB/article/view/430
Research Note