Path - coefficient analysis of wheat (Triticum aestivum L.) germplasm collection of Indonesian Agricultural Biotechnology and Genetic Resources Research Institute (IABGRRI)
2004
Budiarti, S.G.(Balai Penelitian Bioteknologi dan Genetik Tanaman Pangan, Bogor (Indonesia))) | Rizki, Y.S. | Kusumo, Y.W.E.
A research was conducted to study genetic correlation among characters using path-coefficient analysis. Field experiment was conducted at Rice Research Station in Kuningan, West Java on June until October 2002 using a randomized completely block design (RCBD) with three replications. Each of the twenty-seven genotypes of wheat was planted on four rows with 3 m length, with spacing 25 cm x 10 cm. Agronomic characters observed were days to flower, days to harvest, plant height, number of productive tillers per plant, number of grains per spike, spike length, grain weight (100 grains), harvest spikes weight, and grain yield per plant. Correlation coefficients were computed according to the formula of Goulden (1959). Direct and indirect path coefficients were calculated as described by Dewey and Lu (1959). The results showed that days to flower, plant height, spike length, number of grains per spike, and 100-grain weight were uncorrelated with grain yield per plant. On the other hand, the days to harvest, number of tiller per plant, number of spikes per plant, dry spikes weight and harvest spikes weight were positively and significantly correlated with grain yield per plant. The number of tillers per plant, number of spikes per plant, number of grains per spike, and 100-grain weight had positive direct effect on grain yield per plant. The indirect effect on grain yield per plant via number of tillers and number of spikes (productive tillers) per plant showed by days to harvest, dry spikes weight, and harvest spikes weight. The number of productive tillers per plant should be used as a good criteria for improvement of grain yield.
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