Abstract
Investigation to find out the amount of variability present in the Crossandra [Crossandra infundibuliformis (L.) Nees] was carried out at Horticultural College and Research Institute, Periyakulam during 2016-17 using local Nilakottai genotype. The mutagens employed were gamma rays at different estimates of phenotypic variance (phenotypic variation) were higher compared to the genotypic variance (genotypic variation) for all growth and flower characters, indicating the influence of environment. Among the morphological characters studied, high (phenotypic and genotypic variation) were recorded for a number of flowers per plant. Whereas all the other traits showed moderate to low values. All the traits recorded very high heritability in M2 generation in mutant populations of Nilakottai local. The genetic advance as per cent of the mean was high for plant height, number of leaves, internodal length, number of branches, length of the branch, number of days for first flower to emerge, number of spikes per plant, number of flowers per spike, number of flowers per plant, length of spike, yield of flowers per plant, weight of 100 flowers. High heritability values recorded for all the traits measured indicates that genetic variation can be created using Nilakottai local thus ensure continuous improvement through breeding of Crossandra plant.
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Claims 5
Claim · model-written summary
Phenotypic variance exceeded genotypic variance for all growth and flower characters.
- Taxon
- Crossandra infundibuliformis
Crossandra infundibuliformist0 - Outcome
- phenotypic variancee0
- Direction
- highere0
- Comparator
- genotypic variancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“phenotypic variance (phenotypic variation) were higher compared to the genotypic variance (genotypic variation) for all growth and flower characters”
t0“Crossandra infundibuliformis”
Claim · model-written summary
Number of flowers per plant had high phenotypic and genotypic variation.
- Taxon
- Crossandra infundibuliformisCrossandra infundibuliformist0
- Organ / stage
- flowerse0
- Outcome
- phenotypic and genotypic variatione0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high (phenotypic and genotypic variation) were recorded for a number of flowers per plant”
t0“Crossandra infundibuliformis”
Claim · model-written summary
Other traits had moderate to low variation.
- Taxon
- Crossandra infundibuliformisCrossandra infundibuliformist0
- Outcome
- all the other traitse0
- Direction
- moderate to lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all the other traits showed moderate to low values”
t0“Crossandra infundibuliformis”
Claim · model-written summary
All measured traits had very high heritability in M2 mutant populations.
- Taxon
- Crossandra infundibuliformisCrossandra infundibuliformist0
- Material
- Nilakottai locale0
- Organ / stage
- M2 generatione0
- Outcome
- heritabilitye0
- Direction
- very highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All the traits recorded very high heritability in M2 generation in mutant populations of Nilakottai local.”
t0“Crossandra infundibuliformis”
Claim · model-written summary
Several growth and floral traits had high genetic advance as percent of the mean.
- Taxon
- Crossandra infundibuliformisCrossandra infundibuliformist0
- Outcome
- genetic advance as per cent of the meane0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The genetic advance as per cent of the mean was high for plant height, number of leaves, internodal length, number of branches, length of the branch, number of days for first flower to emerge, number of spikes per plant, number of flowers per spike, number of flowers per plant, length of spike, yield of flowers per plant, weight of 100 flowers.”
t0“Crossandra infundibuliformis”