Abstract
Genetic distance among canola cultivars was estimated through multivariate analysis. Thirty cultivars from various sources were analyzed and clustered based upon five morphological characteristics and yield components-crown diameter, number of branches plant-1, number of pods plant-1, number of seeds pod-1 and yield plant-1 -and placed in three distinct clusters. Two cultivars from each cluster were selected as parents and 15 partial-diallel inter- and intra-cluster crosses were made between the six selected parents and evaluated at two locations in Michigan in 1990/1991. The association between genetic distance and mid-parent heterosis was investigated. The correlation between genetic distance and heterosis was positive and highly significant for seed yield, number of pods plant-1, and number of seeds pod-1. Clustering, based on yield and yield-component traits, demonstrated that inter-cluster heterosis was greater than intra-cluster heterosis in the majority of cases.
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Communicated by P. L. Pfahler
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Ali, M., Copeland, L.O., Elias, S.G. et al. Relationship between genetic distance and heterosis for yield and morphological traits in winter canola (Brassica napus L.). Theoret. Appl. Genetics 91, 118–121 (1995). https://doi.org/10.1007/BF00220867
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DOI: https://doi.org/10.1007/BF00220867
Key words
- Canola
- Heterosis
- Genetic distance
- Multivariate analysis