RRDI_Div_Physiology_Research – Department of Agriculture Sri lanka

Telephone

+94 812 388 331 /32/ 34

Email Address

info@doa.gov.lk /
dgoffice@doa.gov.lk

Office Address

Department of Agriculture,P.O.Box.01,
Peradeniya

RRDI_Div_Physiology_Research

Address : Bathalagoda, Ibbagamuwa, Sri Lanka
E- Mail : rrdi@doa.gov.lk

Telephone :(+94) 037-2258561
Fax :(+94) 037-2259881

සිංහල

தமிழ்

Research & Publications- Physiology Division

On Going Research

Publications

On Going Research

Expression of harvest index and sink source variations :

to achieve greater yield potential, higher grain filling with better sink source balance, dry mater remobilization and transport of soluble sugars to panicle is essential. Harvest index indicate above mentioned characters properly. Thus, variations of harvest index of F2 population obtained from cross of highest and lowest harvest index will study for their sink source relations and related traits.

Effect of limited drying at grain filling stage and micro climatic variations on harvest index :

Ability of limited drying on increasing harvest index will be tested and recognize the mechanisms related to yield changes under limited drying at grain filing stage.

Effect of Nitrogen level and planting density on dry matter remobilization of rice :

To increase the yield potential, the effects of the nitrogen level and planting density on leaf photosynthetic characteristics and leaf area development should be examined.

Modification of plant architecture for break through yield potential :

Increase of yield potential needs large source capacity to fill the superior grains in large panicle varieties. But NIV’s which are having semi dwarf gene limits the source capacity. This research aims to improve plant height while increasing culm strength to achieve large source capacity for large panicle varieties.

Physiological adaptation mechanisms to maintaining stay green character under irrigated conditions :

More than 160 accessions screened for stay green character to realize the pattern of chlorophyll degradation. Selected accessions will further study to realize the adaptation mechanisms.

Publications

D.R.Y. Wettasinghea ,L.C. Silva, S.R.W.M.C.J.K. Ranawanaa , P.W. Jeewanthia , M. Yoshimoto 2021. Effect of near canopy thermal changes on growth, yield and grain sterility of three ultra-short age rice varieties under aerobic and flooded conditions. Journal of Agriculture and Value Addition 4 (1): 55–69.

L.C. Silva, Y.M.S.H.I.U. De Silva, H.R.M.C. Rathnayake, W.R.C.P. Samarasinghe, W.C.P. Egodawatta, D.M.J.B. Senanayake, J.M.S.V. Bandara, K.A.K. Wijesena 2021. Selection of Culm Characteristics of Rice to Improve Lodging Resistance and Yield Components. Annals of Sri Lanka Department of Agriculture 23:8. Full paper of this abstract will be published in the Tropical Agriculturist Vol: 170 of 2021.

Mayumi Yoshimoto, Minehiko Fukuoka , Yasuhiro Tsujimoto, Tsutomu Matsui , Kazuhiro Kobayasi , Kazuki Saito , Pepijn A.J. van Oortf , Baba I.Y. Inusah , Chenniappan Vijayalakshmi , Dhashnamurthi Vijayalakshmi , W.M.W. Weerakoon , L.C. Silva , Tin TinMyint , Zar Chi Phyo , Xiaohai Tian , Huu-Sheng Lur , Chwen-Ming Yang , Lee Tarpley, Norvie L. Manigbas , Toshihiro Hasegawa 2022.Monitoring canopy micrometeorology in diverse climates to improve the prediction of heat-induced spikelet sterility in rice under climate change. Agricultural and Forest Meteorology. https://doi.org/10.1016/j.agrformet.2022.108911

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