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Gharge, Punam
- Identification of Candidate Markers Associated with Frying Colour Trait of Potato
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1 Department of Agricultural Botany, College of Agriculture (M.P.K.V.), Baramati (M.S.), IN
2 Laboratory of Plant Breeding, Plant Sciences Group, Wageningen University and Research Center, NL
1 Department of Agricultural Botany, College of Agriculture (M.P.K.V.), Baramati (M.S.), IN
2 Laboratory of Plant Breeding, Plant Sciences Group, Wageningen University and Research Center, NL
Source
International Journal of Plant Sciences, Vol 11, No 2 (2016), Pagination: 291-298Abstract
The demand for potato products like chips and French fries is steadily increasing all over the world. Consumers and potato processing industries have become more stringent for quality along with higher demand of products. Hence, potato breeders are stimulated to develop new potato cultivars with more emphasis on quality traits. Potato breeding is mainly based on crossing two heterozygous parents or complementary parental clones and multi-year clonal selection to identify candidate cultivars with excellent quality. Hence, modern breeders like to use DNA/molecular markers to speed up the selection process by screening large numbers of genotypes at a time. To end up with a shortlist of candidate markers, three criteria; consistency, redundancy and multiple testing corrections were used for removal of false positive and redundant associations. In total, 62 marker-trait associations for frying colour were found to be informative after consistency over several sub traits with threshold level>3.3 in at least three sub traits. Finally, replacement analysis was performed to replace unmapped markers with mapped markers. 22 markers for frying colour trait were selected as a set of marker which could be used in Marker assisted breeding. It is clear that statistical approach provides a quick way of analyzing vast amounts of marker-trait associations to end up with short list of candidate markers. However, conformation is still needed to validate the markers.Keywords
Potato, Candidate Markers, Marker Assisted Selection, Marker-Trait Associations, Frying Colour etc.References
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- Mapping of Candidate Genes Involved in Fatty Acid Synthesis in Brassica rapa
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Authors
Affiliations
1 Department of Agricultural Botany, College of Agriculture (M.P.K.V.), Baramati (M.S.), IN
1 Department of Agricultural Botany, College of Agriculture (M.P.K.V.), Baramati (M.S.), IN
Source
International Journal of Plant Sciences, Vol 11, No 2 (2016), Pagination: 364-374Abstract
Oilseed crops are valuable sources of oil content and fatty acid constituents. Brassica rapa is a well-known oilseed and vegetable crop grown throughout the world. B. rapa has higher genomic similarities with model plant A. thaliana. The genetic regulation of fatty acid biosynthesis is well studied in A. thaliana as well as in B. napus. However, only little information on genetic regulation of fatty acid biosynthesis has been known in B. rapa. The objective of this work was to identify and map the genes involved in fatty acid biosynthesis process in B. rapa DH population (Yellow Sarson, YS-143 x Pak Choi, PC-175). 172 lines of DH68 population was used for genotyping of markers. Comparative mapping was performed to predict positions of genes in B. rapa using two approaches; homology with chiifu sequence and genomic block synteny A. thaliana and B. rapa. Primers were designed for 18 candidate genes and their 16 paralogs genes in B. rapa using Chiifu sequence. Among 31 markers genotyped, 13 markers were mapped in DH68 population are in agreement with predicted positions in genomic blocks. Thus, the research will be useful to co-localise QTLs with candidate gene, identification of putative genes as well as cis and trans positions of genes in future.Keywords
B. rapa, DH Population, Candidate Gene, Fatty Acid Biosynthesis, Comparative Mapping.References
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