Association of yield and yield related traits in aromatic rice (Oryza sativa L.)

Abstract

Sixty cross combinations of SakkhorkhoraR and IR58025A were studied in the experimental field of Bangabundhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during July 2010 to November 2010, to assess the character association & contribution of characters towards grain yield in restorer lines. The correlation study revealed that days to first flowering showed significant positive relationship with seed yield per plant at genotypic levels. Days to maturity showed significant positive relationship with number of tillers per plant at both genotypic and phenotypic level and effective panicles per plant at genotypic level. Plant height showed highly significant positive relationship with effective panicles per plant at both genotypic and phenotypic level. Path analysis study revealed that effective panicles per plant (0.2153) had the highest positive direct effect followed by days to first flowering (0.1492), plant height (0.0646), spikelet fertility status (%) (0.0242) and number of seeds per panicle (0.0241). Days to maturity, spikelet sterility status, effective panicles per plant, plant height, number of tillers per plant, number of seeds per panicle and spikelet fertility status had positive indirect effects on grain yield. So, based on the study days to first flowering, plant height, spikelet fertility status ,effective panicles per plant were identified as the important characters to be considered in the selection for improvement of aromatic rice genotypes.

Morphological variability and genetic diversity of Aman rice germplasm of Bangladesh cultivated in Mymensingh region

“…Total tillers/hill was positively and significantly correlated with effective tillers/hill, filled grains/panicle, 1000grain weight and grain yield/plant. A similar result was found by other researchers for effective tillers/hill (24,53) and for grain yield/plant (24,48) in previous experiments. Regarding effective tillers/hill, the correlation was highly significant and positive with filled grains/panicle, 1000-grain weight and grain yield/plant.…”

Correlation and Path Coefficient Analysis for Yield Contributing Characters in Rice (Oryza sativa L.) Cultivars

“…The indirect effect of days to 50 per cent flowering (0.10) and time to maturity (0.10) through number of panicles per plant was positive and low. Similar, indirect but high effect has been reported by Akhi et al (2016). Days to fifty percent flowering (0.15) and time to maturity (0.11) through number of grains per panicle also showed low positive indirect effect on single plant yield.…”

“…The direct effects of number of grains per panicle (0.58), number of panicles per plant (0.46), and 1000 grain weight (0.56) were positive and high. Akhi et al (2016) and Sathisha (2015) reported similar findings for number of grains per panicle and thousand grain weight respectively. Negative but low direct effect was contributed by days to fifty per cent flowering and positive low direct effect by time to maturity.…”

Evaluation and Selection of Fine and Semi Fine Rice Grain (Oryza sativa L.) Genotypes for Agro-Morphological Traits under Augmented Block Design in Temperate Conditions of Kashmir Valley

“…Roy et al, (2012) studied the variation in agro-morphological and grain quality traits among traditional and Basmati-type aromatic/quality rice and observed highest variation for grains per panicle followed by grain yield per plant. Akhi et al, (2016) reported that spikelet fertility status (%) do have high positive direct effect with grain yield.…”