Abstract
Petunia is an important and beautiful ornamental flowering plant, grown throughout the world for its beauty and attraction. Different <em>Petunia</em> hybrids have been developed by petunia growing countries of the world. The prescribed study was conducted to investigate the association of abscisic acid with seed yield and its contributing traits of petunia line. Data for different physiological, morphological and petunia seed yield traits was recorded, analyzed and interpreted for final inferences. From results it was showed that the petunia lines IAGS-P8, IAGS-P9 and IAGS-P11 performed well for most of the studied traits. It was shown from multivariate analysis techniques that stomata conductance, chlorophyll b contents, seed area, chlorophyll a contents, flower fresh mass, flowers per plant, seed mass and abscisic acid contributed higher to seed yield per plant in petunia. The abscisic acid contents showed positive and significant association and contribution towards seed yield of petunia genotypes. It was suggested that selection on the basis of abscisic acid may be useful to develop good seed yield per plant and large number of flowers per plant in petunia under stressful environmental conditions.
Highlights
The genus Petunia is an important ornamental plant of high economic imperativeness on the whole agriculture
The genetic advantage was found higher for all studied traits except sub-stomata CO2 concentration, flowers per plant, seeds per fruit, seed mass while moderate for abscisic acid content and leaves per plant
The higher broad sense heritability referred the dominance type of gene action and suggested that the selection for such traits may be helpful to develop petunia hybrids with much of vigor and ability to tolerate harsh environmental conditions as higher value of h2bs was recorded for abscisic acid content
Summary
The genus Petunia is an important ornamental plant of high economic imperativeness on the whole agriculture. The history of Petunia development as a crop is accent with implications for an advanced array of added ornamental crops (Cantor et al, 2015; Gerats and Vandenbussche, 2005). This generally developed genus of flowering plants fits in with Solanaceae gang. It is an important ornamental plant in landscape because of colour diversity. A large number of hybrids and varieties have been developed with diverse color and patterns The identification of promising inbred lines for the development of petunia hybrids
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