Abstract
The dynamic expression of genes for oil and protein contents of rapeseed (Brassica napus L.) was carried out with time-dependent measures by using the developmental genetic models for quantitative traits in diploid plant. The unconditional and conditional analysis showed that the accumulated genetic effects or net genetic effects from diploid embryo nuclear genes, cytoplasmic genes and diploid maternal plant nuclear genes were all important for the performance of both nutrient quality traits at most developmental times/stages. Results from the conditional analysis further revealed that the activation of quantitative genes was gradually carried through the developmental process with maternal genes playing more active role at most developmental stages. Additive effects from embryo and maternal plant were found more important than the dominant effects at most developmental times/stages for both traits, and especially for protein content of rapeseed. Heritability analysis confirmed that the maternal heritability for protein contents were considerably stronger throughout developmental period except for the developmental time at 22 days, while for oil content the heritability components were dynamic and time dependent. The differences of genetic relationships from various genetic systems were found for oil and protein contents among the developmental times or between the two quality traits.
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The project was financially supported from Technology Office of Zhejiang Province (No. 2008C22084), Foundation for University Key Teacher by the Ministry of Education and 151 Foundation for the Talents of Zhejiang Province.
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M. T. Variath and J. G. Wu are contributed equally to this paper.
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Variath, M.T., Wu, J.G., Li, Y.X. et al. Genetic analysis for oil and protein contents of rapeseed (Brassica napus L.) at different developmental times. Euphytica 166, 145–153 (2009). https://doi.org/10.1007/s10681-008-9851-x
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DOI: https://doi.org/10.1007/s10681-008-9851-x