Relationship of photosynthesis and related traits to seed yield in oilseed Brassicas
Journal Title: Journal of Applied and Natural Science - Year 2015, Vol 7, Issue 2
Abstract
The physiological basis of yield in oilseeds Brassicas needs to be investigated, and the contribution of these traits to its yield is difficult to decipher. Eight cultivars of Brassica belonging to 3 species viz. B. juncea, B. napus and B. carinata - based on significant differences in yield were tested over two years. Net photosynthesis, transpiration, stomatal conductance and water use efficiency were investigated on 3rd and 4th fully expanded leaf on the main stem and related to yield. Average photosynthetic efficiency (umolm-2s-1) was higher in RLC1 (36.1), GSC6(36.3) and PC5 (33.8) cultivars. Impact of environment was inconspicuous. However interactions (GxY) were significant for the studied photosynthetic traits except Pn. Lower transpiration rates were associated with higher water use efficiency in RLC1 (5.69), GSL1 (5.44) and GSC6 (5.40). Positive correlation between SY and Pn (0.385) was recorded for the first time in Brassicas although the magnitude of association was low. Quality mustard cultivar (RLC1, B. juncea) and amongst B. napus GSC6 (canola) and Hyola PAC401 (hybrid, canola) were higher yielders due to relative high Pn, more efficient utilization of water and chlorophyll content. Indeterminate growth habits of the cultivars indicated highest contribution to Pn by leaves during flowering as compared with early siliquae formation. Environment had a profound impact on the yielding ability and the photosynthetic traits.
Authors and Affiliations
Pushp Sharma
Keywords
Related Articles
- EP ID EP283794
- DOI 10.31018/jans.v7i2.695
- Views 80
- Downloads 0
Dynamics of potassium by the combined use of organic manures and inorganic potassium fertilizers on available nutrients of groundnut crop (Arachis hypogea) in Madukkur soil series
A pot culture experiment was conducted to study the effect of combined use of organic manures with inorganic Potassium (K) fertilizers on available nutrients of groundnut crop under Madukkur soil series at Tamil Nadu Agr...
Studies on site specific nutrient management (SSNM) on hybrid sunflower seed production in Southern Karnataka
A field experiment was conducted at the Main Research Station, University of Agricultural Sciences, Hebbal, Bangalore, to know the effect of Site Specific Nutrient Management (SSNM) on growth (plant height (cm), Leaf are...
Role of agronomic manipulations in modification of wheat microclimate under central Punjab
Wheat crop is influenced by different microclimatic parameters like solar radiation, canopy temperature etc. Agronomic manipulation like change in row spacing and row direction can be used as a strategy to modify the mic...
Disease and pest management in apple: Farmers' perception and adoption in J&K state
Diseases and pests are one of the limiting factors for low productivity of the fruit crops in Kashmir valley, India. A study on management of resources with respect to disease and pest management of apple and extent of a...
Assessment of heavy metals in the surrounding soils and their bioconcentrations in few plants near Kathajodi river, Odisha, India
The present study was carried out mainly concentrate on assessment of heavy metal in the surrounding soils and their bioconcentration in the different plants near Kathajodi River. Soil and plant samples were collected al...