Photosynthesis Efficiency of Culm Habit Near-Isogenic Lines Rice (Oryza sativa L.) to Different Planting Densities

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Year:
2019
Type of Publication:
Article
Keywords:
Culm Habit, NILs, Planting Density, Photosynthesis
Authors:
Tafere, Christian; Irie, Kenji
Journal:
IJRAS
Volume:
6
Number:
6
Pages:
219-229
Month:
November
ISSN:
2348-3997
Abstract:
The cultivars of Near-isogenic lines (NILs) are characterized by identical genetic makeup except one or few loci of genes and dissimilar morphological culm habits. Trial was conducted in Japan and an attempt has been made, to investigate the impact of planting density on the photosynthesis efficiency and discover a correlation between photosynthesis parameters, culm habits and grain yields of NILs rice. An effort to bargain photosynthesis efficiency methods for improving culm habits and grain yield, photosynthesis parameters have been measured on two near-isogenic lines rice, two population densities and two plant spacings. The short culm erect (SC-E) cultivar produced significantly higher photosynthesis rate, poor stomatal conductance, maximum PAR, higher canopy photosynthesis and grain yield than short culm open (SC-O) cultivar for planting density treatments. SC-E NILs were attained maximal photosynthesis rate with 3 seedlings population density and 0.25*0.25m2 spacing but SC-O with 3 seedlings population density and 0.2*0.2m2 spacing had found comparative photosynthesis rate. PAR interception was boosted in SC-E interacted with low population density and wider plant spacing. Yield of two NILs rice were strongly correlated with canopy photosynthesis such that they yielded prudent on SC-E with 3 seedlings planting density and 0.2*0.2m2 spacing (334.2g m-2) and poorly on SC-O with 1 seedling density and 0.25*0.25m2 spacing (105.66 g m-2). To conclude that culm habit NILs rice photosynthesis efficiency and grain yield generally influenced by population density and spacing due to open (≤600) and erect (

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