Genetic divergence in parental genotypes and its relation with heterosis, F1 performance and general combining ability (GCA) in opium poppy (Papaver somniferum L.) |
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| Authors: | H K Yadav Sudhir Shukla S P Singh |
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| Institution: | (1) Division of Genetics and Plant Breeding, National Botanical Research Institute, Lucknow, 226001, India |
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| Abstract: | Summary Genetic divergence in 110 population (20 parents and 90 F1 hybrids) of opium poppy was studied by multivariate analysis. All the entries were grouped in 14 clusters. Out of 20 parents,
ten were accumulated in one cluster and rest 10 distributed over seven clusters. Estimates of cluster distance showed that
maximum intra-cluster distance was in -cluster IX (25.62) followed by cluster I (22.41), V (22.23) and IV (21.06). The inter
cluster distances varied from 16.62 (between cluster XII and XIV) to 195.10 (between cluster IV and IX). The cluster analysis
indicated substantial diversity among the parental genotypes, which had the potential to release considerable variation in
their crosses. The first four principal components (PCs) with eigen values >1 accounted for 68% of variation among the population.
The first and second components could account for 29 and 20% of the total morphological and alkaloidal variations, respectively.
The PC1 was closely related to yield and yield related traits. The characters contributing greatest positive weight on PC1
were opium yield, plant height, stem diameter, capsule weight/plant and seed yield/plant. The possibilities of relationship
between genetic divergence, F1 performance, heterosis and GCA of parents have been explored. |
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| Keywords: | Divergence Hybrids Heterosis Papaver somniferum Principal components |
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