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.
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.
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:
Ř 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.
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)