Correlation and path analysis studies in Gladiolus (Gladiolus hybrids Hort.)

Abstract

Correlation and path analysis were carried out in 12 varieties of gladiolus for different yield attributing traits at the Horticultural Research Station, Tamil Nadu Agricultural University, Yercaud. The results indicated that the Rachis length was positive and significantly correlated with mother corm weight (g), plant height at 60 th days after planting (DAP) (cm), number of leaves per plant at 60 th (DAP), length of spike (cm), weight of daughter corm (g) and vase life (days). But, it is negative and significantly correlated with number of days taken for first floret opening (rg: -0.714 & rp: -0.664), number of daughter corms per plant (rg: -0.826 & rp: -0.724) and marketable spikes per plant (rg: -0.561 & rp: -0.418) at both genotypic and phenotypic levels. For path analysis the residual effect was 0.174 and it was evident that the highest direct effect on length of rachis was observed in case of mother corm size (0.951) and weight of the daughter corm (0.

Genetic Variability and Correlation Studies in Gladiolus Hybridus Hort. Under Bundelkhand Conditions

“…Plant height exhibited highly significant and positive correlation with spike length and rachis length; significant and positive association with vase life. The results obtained are in agreement with the findings of Kumar (2010), Pattanaik et al (2015) and Vetrivel et al (2018) in gladiolus. Spike length exhibited highly significant and positive correlation with rachis length.…”

“…Spike length exhibited highly significant and positive correlation with rachis length. Results are in line with the findings of Vetrivel et al (2018) in gladiolus. Rachis length exhibited highly significant and positive correlation with vase life.…”

“…Number of florets per spike exhibited highly significant and positive correlation with vase life; significant and positive correlation with plant height, spike length and rachis length. Kumar et al (2015), Pattanaik et al (2015 and Vetrivel et al (2018) also reported similar results. Vase life showed positive correlation with water uptake and number of corms per plant, corm diameter and weight.…”

“…Days taken to opening of first floret showed highly significant and positive correlation with number of leaves per plant. Vetrivel et al (2018) also reported significant and positive correlation of number of days taken for first floret opening with number of daughter corms per plant. Similar results were also reported by Vetrivel et al (2018) in gladiolus.…”

“…Vetrivel et al (2018) also reported significant and positive correlation of number of days taken for first floret opening with number of daughter corms per plant. Similar results were also reported by Vetrivel et al (2018) in gladiolus. So, more number of leaves means more plant height and length of spike, because of the increased photosynthesis leading to the availability of more photosynthates.…”