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Pak. J. Bot., 42(1): 259-267, 2010. |
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Updated: 08-03-10 | ||||
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RELATIONSHIP OF MORPHOLOGICAL TRAITS AND GRAIN YIELD IN RECOMBINANT INBRED WHEAT LINES GROWN UNDER DROUGHT CONDITIONS
A. J. KHAN*, F. AZAM AND A. ALI
Abstract: Interrelationship among yield and different yield related traits in 16 wheat recombinant inbred lines (RILS) / varieties were determined by correlation and path coefficient analysis under moisture stress conditions using randomized complete block design with three replications. Grain yield was positively correlated with days to maturity, tillers m-2 and number of grains spike-1. Negative correlation of grain yield was observed with plant height, spike length, peduncle length, peduncle extrusion, sheath length and 1000-grain weight. So far the relationship between different parameters is concerned, 55.55 % genotypic and 57.77 % phenotypic correlations were positive while the remaining were negative. Path analysis indicated that peduncle length had the highest direct effect on grain yield followed by tillers m-2, grains spike-1, spike length and days to maturity whereas peduncle extrusion, sheath length, 1000 grain weight and plant height had negative direct effect on the same parameter. The characters such as days to maturity, tillers m-2 and grains spike-1 having positive direct effect along with positive genotypic correlation on grain yield are considered to be suitable selection criteria for the development of high yielding genotypes.
Nuclear Institute for Food and Agriculture (NIFA), Tarnab, Peshawar, Pakistan. |
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