PJB-1991-11
ANALYISIS ODF A SIX PARENT DIALLEL CROSS IN MUTANTS OF BASMATI RICE
AKBAR ALI CHEEMA
AND M. AFSAR AWAN
Abstract
Nature of genetic control and gene action of
yield and yield components in induced mutants of Basmati rice was investigated in a six parent diallel cross (including reciprocals) involving five mutants and the
parent variety Basmati 370. The resulting 36
F1’s alongwith the six parents were grown in randomly arranged replicated plots. Analysis of variance for all the traits revealed significant differences. Additive genetic
variance was observed for the expression of tillers per plant whereas the influence of both additive and non-additive genetic variance was noted for the expression of panicle length, secondary branches per panicle and spikelets per panicle. Yield per plant was influenced by non additive type of genetic variance. The number of effective factors estimated ranged from 1 for tillers per plant to 2 for the other yield components. Heritability estimates varied from low (0.16%) for grain yield to high (0.63%) for tillers per plant. The results suggest a desired response to selection for tillers per plant, panicle length, secondary branches per panicle and total spikelets per panicle.
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