We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Effect of stem reserve mobilization on grain filling under drought stress conditions in recombinant inbred population of wheat.
- Authors
srivastava, Ashutosh; Srivastava, Puja; Sharma, Achla; Sarlach, R. S.; Bains, N. S.
- Abstract
Pre-anthesis carbon assimilation of stem reserves is considered as an important source for grain filling during post anthesis drought stresses that inhibit photosynthesis. 175 RILs from cross (C518/2*PBW343) along with check cultivars were evaluated for stem reserve mobilization under irrigated and rainfed conditions. These two cultivars belonging to distinct adaptation mechanism, offer several morpho -physiological and biochemical contrasts. C 518 is tall and adapted to low input rainfed conditions whereas PBW 343 is semi -dwarf and input responsive. Further C 518 is known for better stem reserves on account of larger peduncle and strong commitment to grain filling due to effective stem reserve mobilization. The parents and the RIL population was tested for stem reserve mobilization by defoliation of flag leaf and second leaf at anthesis under irrigated and rainfed environments. Evaluated entries differed significantly (p<0.001) for reduction in 1000 grain weight under defoliation (TGWL). Percent reduction in 1000 grain weight ranged from 4.4 % to 39.6 % under irrigated environment and 3.2 % to 35.0 under rainfed condition. A significant positive correlation (r = +0.357) between stem reserve mobilization and peduncle length was observed under rainfed condition. Tested RILs vary individually for stem reserve mobilization when subjected to removal of flag leaf and second leaf inhibiting the photosynthesis. The genotypes with better stem reserve mobilization based on 1000 grain weight in the absence of photosynthesis may also provide relative tolerance to drought.
- Subjects
PLANT stems; EFFECT of drought on plants; WHEAT breeding; PLANT adaptation; CARBOHYDRATE content of plants; INBREEDING; IRRIGATION; PLANTS
- Publication
Journal of Applied & Natural Science, 2017, Vol 9, Issue 1, p1
- ISSN
0974-9411
- Publication type
Article
- DOI
10.31018/jans.v9i1.1137