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Abstract
The present study was conducted with twenty bread wheat genotypes at the experimental field of Bangladesh
Agricultural University (BAU), Mymensingh, during the period from November 2008 to March 2009 to assess the
relationship and selection index among yield and important yield attributing characters. Days to maturity, grains per
spike, 100-grain weight and harvest index showed significant and positive correlation with grain yield per plant. Path
coefficient analysis suggested that grains per spike followed by 100-grain weight and effective tillers per plant
contributed maximum to grain yield positively and directly. Thus, selection based on these characters might be
effective for improving grain yield. Selection indices were constructed through the discriminate functions using eight
characters. From the results, the highest relative efficiency was observed with the selection index based on three
characters; plant height and grains per spike and grain yield per plant. The present investigation indicates that the
index selection based on these three characters might be more effective and efficient for selecting high yielding
wheat genotypes.