A copia-like retrotransposon insertion in the upstream region of the SHATTERPROOF1 gene, BnSHP1.A9, is associated with quantitative variation in pod shattering resistance in oilseed rape

© The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 71(2020), 18 vom: 19. Sept., Seite 5402-5413
1. Verfasser: Liu, Jia (VerfasserIn)
Weitere Verfasser: Zhou, Rijin, Wang, Wenxiang, Wang, Hui, Qiu, Yu, Raman, Rosy, Mei, Desheng, Raman, Harsh, Hu, Qiong
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't BnSHP1.A9 gene expression genetic analysis long terminal repeat retrotransposon natural variation oilseed rape pod shattering seed Retroelements
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520 |a Seed loss resulting from pod shattering is a major constraint in production of oilseed rape (Brassica napus L.). However, the molecular mechanisms underlying pod shatter resistance are not well understood. Here, we show that the pod shatter resistance at quantitative trait locus qSRI.A9.1 is controlled by one of the B. napus SHATTERPROOF1 homologs, BnSHP1.A9, in a doubled haploid population generated from parents designated R1 and R2 as well as in a diverse panel of oilseed rape. The R1 maternal parental line of the doubled haploid population carried the allele for shattering at qSRI.A9.1, while the R2 parental line carried the allele for shattering resistance. Quantitative RT-PCR showed that BnSHP1.A9 was expressed specifically in flower buds, flowers, and developing siliques in R1, while it was not expressed in any tissue of R2. Transgenic plants constitutively expressing either of the BnSHP1.A9 alleles from the R1 and R2 parental lines showed that both alleles are responsible for pod shattering, via a mechanism that promotes lignification of the enb layer. These findings indicated that the allelic differences in the BnSHP1.A9 gene per se are not the causal factor for quantitative variation in shattering resistance at qSRI.A9.1. Instead, a highly methylated copia-like long terminal repeat retrotransposon insertion (4803 bp) in the promotor region of the R2 allele of BnSHP1.A9 repressed the expression of BnSHP1.A9, and thus contributed to pod shatter resistance. Finally, we showed a copia-like retrotransposon-based marker, BnSHP1.A9R2, can be used for marker-assisted breeding targeting the pod shatter resistance trait in oilseed rape 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a BnSHP1.A9 
650 4 |a gene expression 
650 4 |a genetic analysis 
650 4 |a long terminal repeat retrotransposon 
650 4 |a natural variation 
650 4 |a oilseed rape 
650 4 |a pod shattering 
650 4 |a seed 
650 7 |a Retroelements  |2 NLM 
700 1 |a Zhou, Rijin  |e verfasserin  |4 aut 
700 1 |a Wang, Wenxiang  |e verfasserin  |4 aut 
700 1 |a Wang, Hui  |e verfasserin  |4 aut 
700 1 |a Qiu, Yu  |e verfasserin  |4 aut 
700 1 |a Raman, Rosy  |e verfasserin  |4 aut 
700 1 |a Mei, Desheng  |e verfasserin  |4 aut 
700 1 |a Raman, Harsh  |e verfasserin  |4 aut 
700 1 |a Hu, Qiong  |e verfasserin  |4 aut 
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773 1 8 |g volume:71  |g year:2020  |g number:18  |g day:19  |g month:09  |g pages:5402-5413 
856 4 0 |u http://dx.doi.org/10.1093/jxb/eraa281  |3 Volltext 
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