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Linkage research and you may QTL mapping during the an excellent tetraploid russet mapping society from potato

Linkage research and you may QTL mapping during the an excellent tetraploid russet mapping society from potato

Genome-large unmarried nucleotide polymorphism (SNP) indicators coupled with allele dosage pointers enjoys emerged since the a strong unit getting learning advanced characteristics during the grown autotetraploid potato (Solanum tuberosum L., 2n = 4? = 48). At this point, this method might have been effortlessly put on the brand new personality off decimal characteristic loci (QTLs) fundamental highly heritable characteristics such disease resistance, however, mostly unexplored getting faculties that have advanced activities out of heredity.


In this study, an F1 tetraploid russet mapping population (162 individuals) was evaluated for multiple quantitative traits over two years and two locations to identify QTLs associated with tuber sugar concentration, processing quality, vine maturity, and other high-value agronomic traits. We report the linkage maps for the 12 potato chromosomes and the QTL location with corresponding genetic models and candidate SNPs explaining the highest phenotypic variation for tuber quality and maturity related traits. Significant QTLs for tuber glucose concentration and tuber fry color were detected on chromosomes 4, 5, 6, 10, and 11. Collectively, these QTLs explained between 24 and 46% of the total phenotypic variation for tuber glucose and fry color, respectively. The QTL on chromosome 10 was associated with apoplastic invertases, with ‘Premier Russet’ contributing the favorable allele for fry processing quality. On chromosome 5, minor-effect QTLs for tuber glucose concentration and fry color co-localized with various major-effect QTLs, including vine maturity, growth habit, tuber shape, early blight (Altenaria tenuis), and Verticillium wilt (Verticillium spp.).


Linkage data and QTL mapping inside the good russet mapping inhabitants (A05141) having fun with SNP serving pointers successfully recognized advantageous alleles and you will applicant SNPs to have effectiveness brand new buildup out-of tuber cutting sugars. These types of novel indicators possess a high prospect of the improvement off tuber control high quality. Additionally, new finding of various hereditary activities having attributes which have overlapping QTLs within maturity locus obviously implies an independent hereditary control.


Having an intricate polyploid genes the grown autotetraploid potato (Solanum tuberosum L., 2n = 4? = 48) gift ideas book demands getting linkage mapping and quantitative feature loci (QTL) research. The fresh recent growth of potato solitary nucleotide polymorphism (SNP) arrays brings a couple of genome-large indicators that can be used for the mapping and you can quantitative trait locus (QTL) study [1,2,step three,4]bined to the method of getting analytical units that allow the use of allele serving recommendations (i.age., what amount of duplicates each and every allele in the confirmed polymorphic locus), it is now you’ll be able to to notably improve energy away from SNP information so you’re able to discover recombination events in order to utilize this information on the QTL mapping [5,six,7]. So far, this approach has been properly familiar with find novel QTLs and you can candidate SNPs of the later blight opposition [4, 8], internal heat necrosis , Potato trojan Y , and agronomic traits , however, largely unexplored to own training handling top quality or any other high-worth attributes that have complex heredity.

There’s an importance of molecular indicators linked to tuber processing high quality faculties to greatly help your choice of germplasm for cultivar creativity. Handling quality is largely influenced by tuber glucose stuff. The fresh buildup from fructose and you can sugar (cutting sugars) for the potato tubers during cold storage negatively impacts the finish-play with high quality attributes. Reducing sugar blogs try a complicated trait controlled by multiple genetic and environment activities [a dozen, 13]. New complex genetic buildings on the trait try consistent with the hobby many enzymes involved in the metabolic routes connecting starch malfunction and you will synthesis to help you glucose formation and you will utilization [14, 15]. Hereditary mapping research shows you to fry handling top quality and you may reducing glucose is actually regarding the many quick feeling QTLs [sixteen,17,18,19,20]. Soltis-Kalina et al. understood one or two big QTLs getting processor color towards chromosomes step 1 and you can 6 inside a good diploid mapping society. Now, Braun et al. said a couple of QTLs getting resistance to cold-caused sweetening for the chromosomes cuatro and six out of diploid potato. Most of these studies have started performed to escort in Chesapeake your diploid potato germplasm. not, then scientific studies are must most readily useful comprehend the genetic buildings off such attributes on tetraploid peak during the communities derived from russet-skinned potato kinds.

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