Articles
GENETIC COMBINING ABILITY ESTIMATES FOR INHERITANCE OF ECONOMIC TRAITS IN OPIUM POPPY (PAPAVER SOMNIFERUM L.)
Article number
1036_4
Pages
43 – 50
Language
English
Abstract
The F1, F2 and their reciprocals of an eight parent diallel cross in opium poppy (Papaver somniferum L.) were studied for combining ability of seven traits.
The mean sum of squares due to GCA, SCA and reciprocals were significant for studied traits.
The magnitude of GCA variances were invariably higher than SCA, indicating preponderance of non-additive genetic variances, which was further affirmed by the measure of average degree of dominance i.e. (δ2s/δ2g)1/2. Among the parents Sanchita, and VG26 for capsules/plant, VN23, VN35I and Vivek for capsule index, VG26 and Sanchita for seed and straw yield/plant, and VN35I and VG20 for morphine content were found good general combiners.
Earliness being a desired trait, parent VG20 having significant negative GCA estimates coupled with per se performance can be considered as good general combiner for early flowering.
Inclusion of good general combiners in a multiple crossing program or an inter-mating population involving all the possible crosses among them subjected to bi-parental mating may be expected to offer maximum promise in breeding for economic traits.
The mean sum of squares due to GCA, SCA and reciprocals were significant for studied traits.
The magnitude of GCA variances were invariably higher than SCA, indicating preponderance of non-additive genetic variances, which was further affirmed by the measure of average degree of dominance i.e. (δ2s/δ2g)1/2. Among the parents Sanchita, and VG26 for capsules/plant, VN23, VN35I and Vivek for capsule index, VG26 and Sanchita for seed and straw yield/plant, and VN35I and VG20 for morphine content were found good general combiners.
Earliness being a desired trait, parent VG20 having significant negative GCA estimates coupled with per se performance can be considered as good general combiner for early flowering.
Inclusion of good general combiners in a multiple crossing program or an inter-mating population involving all the possible crosses among them subjected to bi-parental mating may be expected to offer maximum promise in breeding for economic traits.
Publication
Authors
B. Kumar, V.R. Singh, G. Ram , H.P. Singh
Keywords
diallel cross, gene action, quantitative traits, additive, non-additive, degree of dominance, bi-parental mating
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