Heritability and genetic advance in recombinant inbred lines of tef (Eragrostis tef) |
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Authors: | H Tefera K Assefa F Hundera T Kefyalew T Teferra |
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Institution: | (1) Debre Zeit Agricultural Research Center, Ethiopian Agricultural Research Organization, P.O.Box 32, Debre Zeit, Ethiopia |
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Abstract: | Recombinant inbred lines (RILs) of the tef cross Kaye Murri × Fesho were evaluated for nine quantitative traits at three locations
in the central highlands of Ethiopia during the 1998/99 main season in order to estimate the genetic coefficient of variation
(GCV), heritability and genetic advance expected from selection. Highly significant differences were obtained among the RILs
for all traits studied. Grain yield, panicle weight and yield per panicle showed a relatively high GCV (12–16%). A comparatively
high heritability was obtained from days to heading (31%) followed by panicle length (25%) and grain yield (23%). Moderate
amounts of heritability values were obtained for panicle weight and yield per panicle. High genetic advance as percent of
the mean were obtained from grain yield (16%), yield per panicle (12%) and panicle weight (10%) at5% selection intensity,
which indicated the possibility of improving these traits. Several RILs were identified that have exceeded the better yielding
parent at all locations. Grain yield showed a strong positive association (r = 0.26–0.70) with shoot biomass, lodging index,
panicle length, plant height, panicle weight and yield per panicle. Overall, the present results showed a) the availability
of genetic variance for some useful traits in the RILs for exploitation through selection, b) the existence of significant
genotype × location interaction that indicated the need to test inbred populations in more environments, and c)the availability
of superior inbred lines for further breeding work.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | Eragrostis tef genetic advance grain yield heritability tef |
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