Relationship between genetic distance and heterosis for yield and morphological traits in winter canola (Brassica napus L.) |
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Authors: | M Ali L O Copeland S G Elias J D Kelly |
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Institution: | (1) Department of Crop and Soil Sciences, Michigan State University, 48824 East Lansing, MI, USA |
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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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Keywords: | Canola Heterosis Genetic distance Multivariate analysis |
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