Development of chrysanthemum (Chrysanthemum morifolium Ramat.) genotypes for loose flower with photo and thermo-insensitivity through inter-varietal crosses
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Date
2022
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Punjab Agricultural University, Ludhiana
Abstract
The present investigations entitled “Development of chrysanthemum (Chrysanthemum morifolium Ramat.) genotypes for loose flower with photo and thermo-insensitivity through inter-varietal crosses” were undertaken at Department of Floriculture and Landscaping and Department of Plant Breeding, PAU, Ludhiana, during the year 2019 to 2022. The study consisted of inter-varietal crossing for development of new hybrids for loose flower production with thermo and photo insensitivity and to determine the self incompatibility analysis in chrysanthemum. In first experiment, five cultivars of chrysanthemum namely Punjab Shingar, Ratlam Selection, Punjab Gold, Gul-e-Sahir and Yellow Delight were selected and six crosses were made. From six crosses total 35 hybrids were obtained and all showed setting of seeds after crossing. Hybrid seedlings along with parentage population were evaluated for morphological and flowering characters. The highest number of seeds per flower head (8.00) were found in cross between Punjab Shingar x Punjab Gold, highest seed germination percentage i.e. 40.00 % and seedling vigour of (48.00) was recorded in cross between Punjab Shingar x Gul-e-Sahir. In second experiment, the hybrids developed were evaluated for morphological and flowering parameters and wide variations with regard to flower shape, size and other growth characters were recorded. In self incompatibility analysis, artificial and natural self-pollinations were performed and pollen germination along with
pollen tube growth was analyzed. Among 25 varieties, only 9 cultivars set seed in natural selfing and 12 set seed in artificial selfing that indicated the self compatibility of varieties. Pollen tube growth was also observed in 12 varieties showing their self compatibility. The incompatible varieties can be further used for improvement of breeding programmes.
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Brar, Poonamjeet Kaur (2022) Development of chrysanthemum (Chrysanthemum morifolium Ramat.) genotypes for loose flower with photo and thermo-insensitivity through inter-varietal crosses (Unpublished Ph.D. Dissertation). Punjab Agricultural University, Ludhiana, Punjab, India.