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Self-Fertility in a Cultivated Diploid Potato Population Examined with the Infinium 8303 Potato Single-Nucleotide Polymorphism Array.
- Source :
-
The plant genome [Plant Genome] 2016 Nov; Vol. 9 (3). - Publication Year :
- 2016
-
Abstract
- Within a population of F hybrids between two genotypes ( L. Group Phureja DM 1-3 516 R44 [DM] and L. Group Tuberosum RH89-039-16 [RH]) used in the potato genome sequencing project, we observed fruit set after self-pollination on many plants. Examination of pollen tube growth in self-fertile and self-unfruitful F plants after controlled self-pollinations revealed no difference in the ability of pollen tubes to reach the ovary. To identify genomic regions linked with self-fertility, we genotyped the F population using a genome-wide single-nucleotide polymorphism (SNP) array. Polymorphic and robust SNPs were analyzed to identify allelic states segregating with the self-fertile phenotype. All 88 highly significant SNPs occurred on chromosome 12. Seeds obtained after self-pollination of self-fertile individuals were used to advance the population for four generations. Genotyping 46 self-fruitful and 46 self-unfruitful S plants on the Infinium 8303 Potato SNP array revealed eight SNPs segregating with self-fertility on chromosomes 4, 9, 11, and 12. Three times more heterozygosity than expected was found in the S generation. Estimates of heterozygosity were influenced by copy number variation (CNV) in the potato genome leading to spurious heterozygous genotyping calls. Some spurious heterozygosity could be removed by application of a CNV filter developed from alignment of additional monoploid potato genomic sequence to the DM reference genome. The genes responsible for fruit set in self-fertile plants in the F generation were restricted to chromosome 12, whereas new genomic regions contributed to the ability of S plants to set fruit after self-pollination.<br /> (Copyright © 2016 Crop Science Society of America.)
Details
- Language :
- English
- ISSN :
- 1940-3372
- Volume :
- 9
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- The plant genome
- Publication Type :
- Academic Journal
- Accession number :
- 27902797
- Full Text :
- https://doi.org/10.3835/plantgenome2016.01.0003