EVALUATION OF ELITE GENOTYPES OF Gomphrena globosa L. UNDER DIFFERENT ENVIRONMENTAL CONDITIONS
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Date
2017-08
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K.R.C. COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
The present investigation entitled “Evaluation of elite genotypes of Gomphrena globosa under different environmental conditions” was undertaken to asses stability of promising gomphrena genotypes under three different environmental conditions viz., polyhouse, shade house and open field condition during the year 2016-17.
The observations in all the environments were assessed for different growth, flowering and yield characters following the stability model of Eberhart and Russell (1966). Analysis of variance revealed that the genotypic variance was significant for all the characters except for plant height at 30 and 90 DAT, stem girth at 30 and 90 DAT, plant spread at 60 and 90 DAT, number of branches at 30 DAT, seed yield per plant, seed yield per plot, seed yield per hectare, fresh and dry weight of individual flower, longevity of flower on plant, shelf life and chlorophyll content. Genotype × environment interaction was significant for plant height at 60 DAT, stem girth at 60 DAT, plant spread at 30 DAT, days to first flowering.
The genotype AGS-5 was stable for vegetative and quality parameters and AGS-6 was stable and predictable for yield parameters and hence these genotypes are well adapted to all the environmental conditions.
Correlation studies over environment for flower yield per plant revealed positive and significant association with plant height at 90 DAT, duration of flowering, crop duration, number of flowers per plant and seed yield per plant, suggesting the possibility of simultaneous selection for these characters.
Cultivation of gomphrena genotypes under naturally ventilated polyhouse can be recommended because the performance of the genotypes grown under polyhouse was good with respect to most of the characters and also polyhouse cultivation was found beneficial to get maximum and superior quality of flower in Bachelor’s button. The genotypes AGS-5 and AGS-6 appeared to be the overall best of genotypes, combining high stability with yield. As these genotypes were stable for most of the characters they can be used in breeding programmes for further crop improvement.
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TH607
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