Analysis of embryo, cytoplasmic and maternal genetic correlations for seven essential amino acids in rapeseed meal (Brassica napus L.)

Chen, Guo Lin; Wu, Jian; Variath, Murali T.; Zhong, Yaping; Shi, Chun Hai

doi:10.1007/s12041-011-0040-7

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…Genotypic correlation could eliminate the interference caused by random error, and is an important statistical parameter that is superior to phenotypic correlation (Chen et al 2011a). In the present experiment, most components of genetic main and GE interaction correlation between LLA and EA contents were significantly negative at various developmental times, which indicated that the activation and expression of genes for both quality traits at different seed growth periods had close relationship (Chen et al 2011b). Molecular markers significantly associated with both erucic and linolenic acid levels were detected in rapeseed.…”

Section: Discussionsupporting

confidence: 48%

Dynamic gene expression analysis of maternal, cytoplasmic and embryo genetic systems for linolenic and erucic acid contents in rapeseed (Brassica napus L.)

Variath

Shi

2015

Euphytica

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The genetic effects including genetic main effects and genotype 9 environment (GE) interaction effects were analyzed for linolenic acid content (LLAC) and erucic acid content (EAC) in rapeseed using unconditional and conditional genetic models for diploid seed quantitative traits. The results from unconditional analysis revealed that GE effects were important for both traits during seed development. Also the higher magnitude of embryo effects at different developmental times indicated that seed selection would be useful for improving these quality traits in rapeseed. The conditional analysis showed that new expression of genes from maternal and embryo genetic systems occurred during different developmental stages and their magnitude could be influenced by the GE effects. The total narrow-sense heritability was high for both LLAC and EAC, with general heritability being more prominent for EAC at 15 days (32.87 %), 29 days (31.44 %), 36 days (60.55 %) and 43 days (76.45 %), and GE interaction heritability dominating for LLAC at 22 days (40.57 %), 29 days (60.91 %), 36 days (63.83 %) and 43 days (47.45 %) after flowering, respectively. Phenotypic and genotypic correlations for both traits were positive among some pairwise developmental times indicating that genes expressed at these times complemented each other to improve LLAC or EAC in rapeseed. Significant negative correlation between LLAC and EAC at most developmental times indicated that it may not be possible to simultaneously reduce the contents of both traits by indirect selection.

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Section: Discussionsupporting

confidence: 48%

Dynamic gene expression analysis of maternal, cytoplasmic and embryo genetic systems for linolenic and erucic acid contents in rapeseed (Brassica napus L.)

Variath

Shi

2015

Euphytica

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QTL mapping and analysis of the embryo and maternal plant for three limiting amino acids in rapeseed meal

Long

et al. 2014

Eur Food Res Technol

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Timing of gene expression from different genetic systems in shaping leucine and isoleucine contents of rapeseed (Brassica napus L.) meal

Chen

Variath

et al. 2011

J Genet

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Experiments were conducted on rapeseed (Brassica napus L.) using a diallel design with nine parents: Youcai 601, Double 20-4, Huashuang 3, Gaoyou 605, Zhongyou 821, Eyouchangjia, Zhong R-888, Tower and Zheshuang 72. The seed developmental process was divided into five stages, namely initial (days 1-15 after flowering), early (days 16-22 after flowering), middle (days 23-29), late (days 30-36), and maturing (days 37-43) developmental stages. The variation of dynamic genetic effects for leucine and isoleucine contents of rapeseed meal was analysed at five developmental stages, across different environments using the genetic models with time-dependent measures. The results from unconditional and conditional analyses indicated that the expression of diploid embryo, cytoplasmic and diploid maternal plant genes were important for leucine and isoleucine contents at different developmental stages of rapeseed, particularly at the initial and early developmental stages. Among different genetic systems, nutrition quality traits were mainly controlled by the accumulative or net maternal main effects and their GE interaction effects, except at maturity when the net diploid embryo effects were larger. The expression of genes was affected by the environmental conditions on 15, 22, 29 or 36 days after flowering, but was more stable at mature stage. For the isoleucine content the narrow-sense heritabilities on 15, 22, 29, 36, and 43 days after flowering were 43.0, 65.7, 60.1, 65.5 and 78.2%, respectively, while for the leucine content the corresponding narrow-sense heritabilities were relatively smaller. The interaction heritabilities were more important than the general heritabilities at the first three developmental times. The improvement for isoleucine content could be achieved by selection based on the higher narrow-sense heritabilities. Various genetic systems exhibited genetic correlations among the developmental times or leucine and isoleucine contents. A simultaneous improvement of leucine and isoleucine contents seems possible because of the significant positive genetic correlation components from different genetic systems at different developmental times.

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Analysis of embryo, cytoplasmic and maternal genetic correlations for seven essential amino acids in rapeseed meal (Brassica napus L.)

Cited by 3 publications

References 27 publications

Dynamic gene expression analysis of maternal, cytoplasmic and embryo genetic systems for linolenic and erucic acid contents in rapeseed (Brassica napus L.)

Dynamic gene expression analysis of maternal, cytoplasmic and embryo genetic systems for linolenic and erucic acid contents in rapeseed (Brassica napus L.)

QTL mapping and analysis of the embryo and maternal plant for three limiting amino acids in rapeseed meal

Timing of gene expression from different genetic systems in shaping leucine and isoleucine contents of rapeseed (Brassica napus L.) meal

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