Abstract
Knowledge about the genes implicated in lipid biosynthesis acquired from the model plant Arabidopsis is useful in understanding the formation of seed oil in Brassica oilseeds. In this paper, we report the screening of polymorphic markers at the loci putative for the seed oil formation between two geographically different genotypes: the Chinese cultivar Ningyou-7 and the European cultivar Tapidor. These primer pairs (150) were designed based on 75 Brassica genes that were Arabidopsis orthologues implicated in the oil formation. A total of 52 out of the 150 primer pairs associated with 47 of the 75 genes showed polymorphisms between the two genotypes. The type of polymorphisms that could be detected on capillary electrophoresis images and their respective visual futures are described. Further, we selected 34 polymorphic markers to scan allelic variations and found rich DNA polymorphisms among the 54 Brassica oilseed cultivars. On the average, each primer pair resulted in 5.6 alleles at the region that was covered. The correlation between the alleles and seed quality traits revealed that the alleles of BnFAD7 were related to the variation of linolenic acid (C18:3) contents among the cultivars. The allele FAD7-ics11170 (3/4)-b that was significantly correlated with high linolenic acid content can be used as an efficient marker for the selection of breeding materials with high linolenic acid content.
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Abbreviations
- FAD:
-
Fatty acid desaturase
- DR:
-
Dominant and recessive
- FSP:
-
Fragment size polymorphism
- C type:
-
Combined type
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Acknowledgments
The work of our lab was supported by National Basic Research Program of China (abbreviated as 973 projects, program code: 2006CB101602), Natural Science Foundation of China (abbreviated as NSFC; the program code: 30671339) and National High-Tech R & D Program (abbreviated as 863 program; the program code: 2006AA10A113). We are thankful to Prof. Xiaoming Wu, the Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences for providing the Brassica oilseed landraces, to Prof. Chunhai Shi and Dr. Jianguo Wu and the Institute of Agrobiology and Environmental Sciences (985-IAES) of Zhejiang University for providing the convenience to use equipments.
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Congguang Shi and Yana Zhu contributed equally to this paper.
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Shi, C., Zhu, Y., Li, Y. et al. DNA allelic variations at the loci putatively implicated in seed oil formation among Brassica oilseed cultivars. Mol Breeding 26, 51–64 (2010). https://doi.org/10.1007/s11032-009-9376-6
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DOI: https://doi.org/10.1007/s11032-009-9376-6