PHYSIOLOGICAL INVESTIGATIONS IN MESTA GENOTYPES (Hibiscus spp.)
Loading...
Date
2004
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Agricultural Science, Dharwad
Abstract
"A field experiment was conducted at MARS, UAS, Dhanvad during
kharif 2002 to asses the physiological, biophysical and biochemical basis of
yield difference in mesta genotypes under this non-traditional area. The
experiment consisted of 11 genotypes of two species of mesta (Hibiscus
sabdariffa and H. cannabinus) with three replications laidout in RBD. The
crop was raised with recommended agronomic practices. The periodical
observations were recorded. The correlation study of these parameters with
fibre yield was also made.
Genotypes showed significant differences in their morphological
parameters. The genotypes AS-73 CP-560, HS-2, AMV-4 and AMV-3
recorded significantly higher plant height, number of leaves, number of
branches and basal stem diameter and these parameters showed significant
positive correlation with fibre yield. The dry matter accumulation in leaves
increased upto 120 DAS and decreased thereafter, while dry matter
accumulation in stem, reproductive parts and TDMP increased till harvest
and these parameters were found significantly higher in AS-73 CP-560
followed by HS-2, AMV-4 and AMV-3. These genotypes also recorded
significantly higher LA, LAI, LAD, CGR and NAR. All above parameters
except NAR showed significant and positive correlation with fibre yield. The
biophysical parameters viz., RWC (%), LIR (%) and number of stomata on
both abaxial and adaxial surfaces recorded significantly higher values in
AS-73 CP-560 followed by HS-2, AMV-4 and AMV-3. These parameters
showed significant and positive correlation with fibre yield. Biochemical
parameters viz., leaf chlorophyll, phenols, tannins and sugars content were
significantly higher in AS-73 CP-560, HS-2, AMV-4 and AMV-3 genotypes
and these parameters showed significant and negative correlation with fibre
yield except chlorophyll at harvest.
The genotypes AS-73 CP-560, HS-2, AMV-4 and AMV-3 recorded
significantly higher fibre yield, stalk yield, fibre equivalent yield, fibre
recovery (%) and days to 50% flowering, while seed yield and 1000-seed
weights were significantly lower compared to others. All above yield
components recorded positive correlation with fibre yield except seed yield. It
is concluded from the present study that the genotypes AS-73 CP-560
(13.67 q/ha), HS-2 (13.34 q/ha), AMV-4 (12.90 q/ha) and AMV-3
(12.39 q/ha) are high fibre yielding genotypes and HC-583 (7.55 q/ha),
AMC-108 (7.23 q/ha) and AMV-2 (7.27 q/ha) are high seed yielding
genotypes. The phenotypic characters viz., plant height and stem dry matter
are significantly and positively associated with fibre yield while seed yield is
significantly and negatively associated with fibre yield. There is a potential
for yield improvement in both fibre and seed yield on need basis in these
mesta genotypes."
Description
Keywords
null
Citation
No. of references 98