Mulberry Physiology
1. To
evaluate nutritionally superior mulberry genotypes/ varieties for stress
tolerant - drought and flood tolerant and selection of parent for future
breeding programmes.
2. Improvement of leaf quality through nutrient fortification by use of plant growth regulators, macronutrients and micronutrients.
v Superior
mulberry varieties viz. Akaji, Ichinose, Sukakuchi, Egypt cairoand
Kurimato viz., Sultanpur, MS-1, Tollygunj, Takada and Dudiah were screened out
of 90 exotic varieties and 72 indigenous varieties through physio-biochemical
characters and leaf yield.
Water logged tolerant mulberry
varieties:
v C-2028
and S-1 were
identified as water logged tolerant mulberry varieties through
physio-biochemical study.
v Kinetin
based PGR could restore the leaf yield by 30% and cocoon yield by 20% under
water logging condition.
Drought tolerant mulberry
variety:
v C1730
was identified as a drought tolerant variety with leaf yield (13.3 mt ha-1yr-1),
maximum abscisic acid content under red laterite soil.
Screening Tool:
v Two
biochemical markers(s) – abscisic acid and glutathione reductase identified as a
screening tool for identification of drought tolerant variety in mulberry
Morizyme-B, a plant growth
regulator:
v Foliar
spray of NAA based PGR, Morizyme–B (formulated by this section) increased
mulberry leaf yield by 25 – 30 %, leaf protein by 30% and sugar by 31% during
winter season. Thus a farmer can earn Rs.
4670.00 /-ha-1 crop-1 by
selling excess leaves or Rs.5278/- ha-1 crop1 by
rearing with N x Bi hybrids with the additional leaves.
v Morizyme-B
has been commercialized.
Screening of Mulberry
varieties:
v Five
mulberry varieties viz. SV1, V1, RFS-175, MR-2, and JRH were evaluated at CSR
&TI, Berhampore (both irrigated and rainfed), Technical Service Center, Kashipur,
Purulia (W.B.), RSRS- Koraput, Ranchi, Kalimpong and Jorhat under rainfed
condition on the basis of different yield attributes, physio-biochemical
characters and bioassay.
v S
1635 for CSR&TI, Berhampore (irrigated and rainfed), Ranchi,
Kalimpong follwed by S146 at Kalimpong and S1 at Ranchi.
v S-34
for Koraput followed by S-1635
v C-1730
for Purulia followed by RFS-175
v JRH
at Jorhat followed by S-1635
v RFS-175
was also identified as water stress tolerant variety showing minimum wilting
coefficient (8.24%) less reduction in membrane stability and increase in
glutathione reductase activity.
S-1635 identified as a best
mulberry variety for chawki garden.
v S-1635
mulberry variety also suites best for chawki:
v Chawki
leaf yield: 15.7 mt/ha/year.
v Leaf
moisture: 79.60%
v Total
soluble Protein: 25.94 mg.g–1 f.wt.
v Total
soluble sugar: 27.61 mg.g–1 f.wt.
v Moulting
%: 90.92
· Portable
photosynthesis system
· U-Vis
Spectrophotometer
· Leaf
water potential meter
· Mettlet
Moisture Analyser, DR
· Hydroprobe
Moisture Gauge
· High
and Low speed REMI Centrifuge
· Cryocan,
Lux Meter
· PH
Meter, Pocket PH Meter
· Hot
and Cold Water Bath
· Double
Glass Distillation Plant
· Ordinary
Microscope
· Hot
Air Oven and Computer.
ü PIP3356: Studies
on the variability in photosynthesis and related physiological parameters of
some promising mulberry genotypes for future breeding programme. (Feb, 2006 –
Mar, 2009).
Objective: Screening
of Photosynthetically efficient mulberry genotypes for utilization in breeding
programme.
Progress:
Mulberry genotypes T-36, T-37, T-30 and T-33 (Tetraploids) and S-1572, S-1574, S-162 and S-1615 (Diploids) were found promising with respect to photosynthetic rate, stomatal conductance, water use efficiency, Total chlorophyll, total soluble protein and leaf moisture %.
These physiologically efficient genotypes may be utilized in crop improvement programme
EO1: Screening
of photosynthetically efficient mulberry genotypes for utilization in future
breeding programme.
EO2: Selection of nutritionally
efficient mulberry genotypes
E03: Inheritance pattern of
photosynthesis and related parameters for aiding breeding programme:
Ø Field
trial of flood tolerant mulberry variety (Feb, 2006 – Mar, 2009).
[In
collaboration with DOS West Bengal]
Objective: To
confirm the tolerance capability of C-2028 variety planted in flood prone areas
in natural condition at farmer’s field.
Progress:
The saplings of variety C-2028,
S-1 and S-1635 were planted at different farmers’ field in low-lying areas,
which remain inundated during rainy season for assessment and validation of a
suitable variety for water logged areas.
1) PIP
001: Nutritional studies in mulberry (1990-96)
2) PIP002:
Improvement of plant productivity through use of commercial plant growth
regulator. (1990 – 1996).
3) PIP003:
Studies on environmental stress in mulberry (1991-98).
4) PIP004:
Evaluation of improved mulberry varieties for eastern and north - eastern region
of india (1997-2001)
5) PIP
3194: screening of improved mulberry varieties for flood tolerance (2001-2004)