VARIABILITY AND CAUSE EFFECT ANALYSIS FOR FODDER AND
GRAIN YIELD CHARACTERS IN OAT (AVENA SATIVA L.)
GENOTYPES
D. T. SURJE, SWARNAJIT DEB BARMA, S. B. SATPUTE1, V. A. KALE, APARAJITA DAS AND D. K. DE2
Department of Genetics & Plant Breeding
Uttar Banga Krishi Viswavidyalaya,
Pundibari, Cooch Behar-736 165 (West Bengal), India
*(e-mail : dinosurje@gmail.com)
(Received : 17 April 2015; Accepted : 27 July 2015)
SUMMARY
A field experiment was conducted at the Central Research Farm of Bidhan Chandra Krishi
Viswavidyalaya, Mohanpur, West Bengal during 2009-10 to estimate the mean performance of yield and other morpho-physiological characters and also to determine their effects (direct and indirect) towards yield (fodder and grain yield). Considering green forage yield, and dry matter yield, it was observed that the genotype NOD-609 produced the highest and significantly higher mean for both the characters. However, considering the mean values for different characters of cut and uncut management of oat genotype Kent and JHO-99-2 had highest total grain yield per plant and number of grains per panicle. Path analysis was carried out considering grain yield as the dependent variable. Chlorophyll ‘b’ content showed highest positive direct effect towards grain yield where one cut was practised at 55 days of the crop which was followed by chlorophyll ‘a’ content, number of grains per panicle, crude protein (%), length of panicle, tiller number per plant and weight of flag leaf. But when no cut was practised, characters like number of grains per panicle, green forage yield per plant, total chlorophyll content, tiller number per plant, number of spikelets per panicle, 100-seed weight and length of panicle had direct effect towards grain yield.
Key words:Variability, path analysis, fodder, oat, yield