Directorate of Rice Research (DRR), through All India Coordinated ...

DRR Annual Progress Report 2010, Vol.1 – Varietal Improvement
RAINFED UPLAND TRIALS
The production and productivity of rice in rainfed upland spread over central, sourthern and
eastern region of country is low (around 0.7 to 1.5 t/ha). The productivity of this ecology is
hampered due to erratic and less rain fall during crop growth period, low soil fertility, heavy
infestation of weeds, pest and disease like blast, brown spot, root not nematode, leaf folder, BPH,
etc. To improve the productivity of this ecology, the concerted efforts to develop suitable varieties
having drought tolerance along with several major pest and disease resistance are needed.
Considering the limitations one of the major objectives of the AICRIP programme is to identify a
suitable culture with biotic and abiotic tolerance of very early and early duration, a total of 25
entries in very early (6 in AVT and 19 in IVT) and 26 entries in early (8 in AVT and 18 in IVT)
group were evaluated in 21 experiments of VE and 24 trials in duration at different locations
covering the states of UP, MP, JH, CH, OR, WB, MA, GU, TN and KA in regions 3, 4 and 5 under
rainfed direct seeded conditions. The major findings are discussed trialwise as below:
ADVANCE VARIETY TRIAL – VERY EARLY (DIRECT SEEDED)
AVT-VE (DS)
Locations : 10 Entries : 9
Checks : Anjali (National), Vandana (Regional Eastern), Varalu
(Regional Western & Southern) and local
1.1
Table : 1.1
The trial was constituted with 6 test entries and three checks - national (Anjali), regional;
Vandana (Eastern) and Varalu (Western and Southern) and local. Of the 6 test entries three were in
3 rd year of testing and the other 3 entries were promoted from IVT-VE-DS. The trial was evaluated
under direct seeded rainfed conditions at 9 locations, while at Jabalpur trial was evaluated under
irrigated transplanted condition. Hence, the data from Jabalpur, was not considered in analyzing the
performance of entries. The trial was evaluated at Bhubaneshwar, Hazaribagh, Ranchi, Rewa,
Jagdalpur, Tuljapur,Vyara, Derol, Paramakudi and Jabalpur, covering region 3, 4 and 5. The
drought was experienced at Bhubaneshwar, Hazaribagh and Paramakudi at different crop growth
stages. While at other locations normal rainfall was received during crop growth stages. The
information on rainfall, drought spell, number of days of drought, experimental mean yield, range,
highest yielding checks are presented below:
General information on the drought situation in the trial AVT-VE-DS, Kharif 2010
Location
Yield
range of the
entries
(kg/ha)
Experimental
mean
(kg/ha)
Yield
of the best
check/name
(kg/ha)
BBN 1524-2346 2009 Shankar
(LC) 2247
HZB 1150-1944 1545 Anjali
(NC) 1600
PRK 903-2106 1387 Anna
(LC) 2106
Drought spell
1 st drought spell of 7 days at tillering stage.
2 nd drought spell of 5 days at milking.
Three drought spells at tillering, flowering, grain filling
stages.
1 st drought spell of 10 days at germination.
2 nd drought spell of 11 days at vegetative stage.
3 rd drought spell of 30 days at grain filling & maturity
stage.