Phenotypic characterization and genetic variability of Muthu Mullai mutants ofJasminum auriculatum for induction of homeotic mutants

S P  MIRUNALINI; M  GANGA; K  RAJAMANI; B  MEENAKUMARI; M  SUGANTHY; N MANIKANDA  BOOPATHI

doi:10.56093/ijas.v94i7.147400

Authors

S P MIRUNALINI Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
M GANGA Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
K RAJAMANI Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
B MEENAKUMARI Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
M SUGANTHY Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
N MANIKANDA BOOPATHI Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India

https://doi.org/10.56093/ijas.v94i7.147400

Keywords:

: Elite mutants, Flowering traits, Genetic variability, Homeotic mutants, Jasminum auriculatum, Morphological traits

Abstract

An experiment was conducted during 2021–23 at Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu to create genetic variation in Jasminum auriculatum (Vahl.) by inducing mutation using physical and chemical means, through gamma rays and Ethyl Methane Sulphonate (EMS). The present study was designed to evaluate the M₁V₃ generation putative mutants of J. auriculatum ecotype Muthu Mullai generated through physical and chemical mutation with various dosages of gamma radiation and EMS. The study revealed that among the mutagen treated population, the plants subjected to 15 Gy gamma irradiation and 5 mM EMS recorded the maximum vegetative growth parameters including number of primary and secondary branches, internodal length, number of leaves, leaf length and leaf width and flower quality parameters namely days to flowering, number of flowering cymes/branch, flower bud length, corolla tube length, bud girth, flower diameter and 100 flower bud weight than control. Homeotic mutants were identified and isolated from the mutated population and this study further explored the reliability of the observed traits for making effective selection for crop improvement.

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