Laju Paul K
Variability in Morphological, Physiological and Biochemical Characters in Kalmegh (Andrographis paniculata Nees.) - Vellanikkara Department of Plant Breeding and Genetics, College of Horticulture 2000
An experiment ID kalmegh (Andrographis panicu/ata Nees.) was
conducted in the Department of Plant Breeding and Genetics, College of
Horticulture, Vellanikkara during 1998-2000, with the objectives of understanding
the morphological variability, growth pattern, optimum stage of harvest and the
variation in different biochemical compounds among the accessions. The
accessions were collected from Kerala and neighbouring states.
Ten accessions were compared based on 50 morphological, 16
physiological and 3 biochemical characters. In general, accessions showed uniform
root, inflorescence, flower and fruit characters. However a limited variation for
habit, stem and leaf characters existed among most of the accessions.
In general, accessions showed variability for characters namely total
plant dry weight, stem dry weight, leaf dry weight and root dry weight when
observed at 1, 2, 3 and 4 months after transplanting. Ranking of the accessions was
not consistent on the various dates of harvest. Optimum stage of harvest is
recommended as 3 months after transplanting. At this stage maximum herbage
yield was recorded by accession Ac-4. Physiological parameters namely Leaf area
and LAI showed steady increase up to three months after transplanting and
thereafter it declined. LAR, RGR, CGR and NAR recorded higher values at earlier
dates.
Heritability (broad sense) of characters showed inconsistency at various
dates of harvest. However leaf dry weight showed higher heritability on all dates.
At 3 months after transplanting i.e. the optimum stage of harvest, heritability was
high for all the characters relating to herbage yield and most of the physiological
parameters.
Biochemical studies revealed that the total phenol content and
andrographolide content varied considerably among the accessions. Phenol content
in the plant increased with an increase in dry weight while Andrographolide
content increased with a proportionate increase in moisture content.
630.28 / LAJ/VA
Variability in Morphological, Physiological and Biochemical Characters in Kalmegh (Andrographis paniculata Nees.) - Vellanikkara Department of Plant Breeding and Genetics, College of Horticulture 2000
An experiment ID kalmegh (Andrographis panicu/ata Nees.) was
conducted in the Department of Plant Breeding and Genetics, College of
Horticulture, Vellanikkara during 1998-2000, with the objectives of understanding
the morphological variability, growth pattern, optimum stage of harvest and the
variation in different biochemical compounds among the accessions. The
accessions were collected from Kerala and neighbouring states.
Ten accessions were compared based on 50 morphological, 16
physiological and 3 biochemical characters. In general, accessions showed uniform
root, inflorescence, flower and fruit characters. However a limited variation for
habit, stem and leaf characters existed among most of the accessions.
In general, accessions showed variability for characters namely total
plant dry weight, stem dry weight, leaf dry weight and root dry weight when
observed at 1, 2, 3 and 4 months after transplanting. Ranking of the accessions was
not consistent on the various dates of harvest. Optimum stage of harvest is
recommended as 3 months after transplanting. At this stage maximum herbage
yield was recorded by accession Ac-4. Physiological parameters namely Leaf area
and LAI showed steady increase up to three months after transplanting and
thereafter it declined. LAR, RGR, CGR and NAR recorded higher values at earlier
dates.
Heritability (broad sense) of characters showed inconsistency at various
dates of harvest. However leaf dry weight showed higher heritability on all dates.
At 3 months after transplanting i.e. the optimum stage of harvest, heritability was
high for all the characters relating to herbage yield and most of the physiological
parameters.
Biochemical studies revealed that the total phenol content and
andrographolide content varied considerably among the accessions. Phenol content
in the plant increased with an increase in dry weight while Andrographolide
content increased with a proportionate increase in moisture content.
630.28 / LAJ/VA