Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810108190
Authors: NEELAM THAKUR
Title: BREEDING CHRYSANTHEMUM (DENDRANTHEMA X GRANDIFLORA TZVELEV) FOR QUALITY AND RESISTANCE TO WHITE RUST (PUCCINIA HORIANA HENN.)
Publisher: IIHR ICAR-INDIAN AGRICULTURAL RESEARCH INSTITUTE NEW DELHI
Language: en_US
Type: Thesis
Agrotags: null
Abstract: The present investigation was undertaken on “Breeding chrysanthemum (Dendranthema x grandiflora Tzvelev) for quality and resistance to white rust (Puccinia horiana Henn.)” at ICAR-Indian Institute of Horticultural Research, Hesaraghatta, Bengaluru during 2015-17. The objectives of the investigation were to screen chrysanthemum genotypes for resistance to white rust, to evaluate chrysanthemum genotypes for desirable horticultural traits, to develop induced mutants from selected genotypes for quality traits and white rust resistance, to analyze selected chrysanthemum genotypes for phenolics and flavonoid profiles and its correlation to white rust resistance. Chrysanthemum is one of the important floriculture crops in the world, which is used as cut flower, loose flower, potted plant as well as in landscaping. This research work on resistance breeding of forty-nine chrysanthemum genotypes for white rust resistance with desirable horticultural traits for specific purposes was carried out and genotypes were categorized according to the disease severity. Twenty-seven genotypes were identified as resistant; five genotypes viz. Flirt, CO.1, Fitonia, Rekha and Arka Ravikiran as moderately resistant; eight chrysanthemum genotypes viz. Pusa Aditya, Marigold, Vijay Kiran, Ratlam Selection, Anmol, Shyamal, Vasanthika and Sunil as highly susceptible, nine genotypes viz. Rajat, Coffee, Arka Yellow Star, Kargil, Roopanjali, Winter Queen, Sharadmala, Sadbhavana and Arka Chandrika as susceptible. The evaluation study of forty-nine chrysanthemum genotypes for desirable horticultural traits showed considerable morphological variation for all vegetative and flowering traits. These traits could be considered for selecting genotypes for cut flower, loose flower, pot-culture and garden display. Trait specific selection of parents for further improvement in chrysanthemum can also be undertaken. Ten chrysanthemum genotypes were gamma irradiated with 0, 10, 20, 30, 40 and 50 Gy and the LD50 ranged from 15.72 Gy (Marigold) to 30.10 Gy (Arka Chandrika). Significant difference was observed in plant survival, vegetative and floral traits among chrysanthemum genotypes with respect to gamma doses. Irradiation of rooted cuttings with gamma rays (10, 20 144 and 30 Gy) of different chrysanthemum genotypes resulted in putative mutants from Arka Chandrika, Arka Kirti, Arka Pankaj, Pusa Aditya, Arka Red Gold and Arka Yellow Gold which differed with respect to flower colour and flower shape. The putative mutant of Arka Yellow Gold at 10 Gy has been carried forward to VM3 generation and was found to be resistant to white rust. Total phenols and total flavonoids were positively correlated with white rust resistance in chrysanthemum genotypes. The genotypes resistant to white rust disease had higher levels of salicylic acid and t-cinnamic acids among the phenolic acids and apigenin, catechin, epigallocatechin, luteolin and rutin among the flavonoid compounds as compared to susceptible genotypes. Keywords: Chrysanthemum; white rust; screening; mutation; phenolics
Description: t-10021
Subject: Horticulture
Theme: BREEDING CHRYSANTHEMUM (DENDRANTHEMA X GRANDIFLORA TZVELEV) FOR QUALITY AND RESISTANCE TO WHITE RUST (PUCCINIA HORIANA HENN.)
These Type: Ph.D
Issue Date: 2019
Appears in Collections:Theses

Files in This Item:
File Description SizeFormat 
Thesis.pdf
  Until 2020-12-31
9.69 MBAdobe PDFView/Open Request a copy


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.