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Assesment and Induction of Variability for Higher Yield and photoinsensivity in Coleus(Coleus Parviflorus Benth)
The project entitled "Assessment and induction of variability for higher yield and photoinsensitivity in coleus (Coleus parviflorus Benth)" were carried out in the Department of plant Breeding and Genetics during the period April 1999 to April 2002, with the objective of inducing variab...
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| Formato: | Ph.D Thesis |
| Idioma: | Undetermined |
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Vellanikkara
Department of Plant Breeding and Genetics, College of Horticulture
2002
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| Resumo: | The project entitled "Assessment and induction of variability for higher
yield and photoinsensitivity in coleus (Coleus parviflorus Benth)" were carried out
in the Department of plant Breeding and Genetics during the period April 1999 to
April 2002, with the objective of inducing variability for photoinsensitivity and
higher yield through in vivo and in vitro mutagenesis. Three major field
experiments were laid out one at Agricultural Research Station, Mannuthy and two
experiments at College of Horticulture, Vellanikkara.
Among the collected coleus genotypes wide genetic variability for all
the observed characters were noticed. Increased harvest index plant", tuber weight
plant" and reduced height plant" contributed to tuber yield. Representative
genotypes of the ten clusters were subjected to mutagenic treatment. Mutation has
changed the plant height, age of tubers and. tubers plant" in coleus genotypes.
Selected mutants showed photoinsensitivity to tuberization an acceptable
qualitative change. Mutant 131 and mutant 61 were identified as promising
photoinsensitive mutants for year round cultivation. One photoinsensitive tissue
culture mutant was identified. But these require further evaluation for yield.
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