Crossability ofSolanum tuberosum haploids with diploidSolanum species

Hougas, R. W.; Peloquin, S. J.

doi:10.1007/bf02365602

Cited by 38 publications

(3 citation statements)

References 9 publications

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“…Intercrossing different Solanum species may be complicated due to differences in ploidy levels, but several natural and artificial mechanisms are available to circumvent this crossing barrier (Hougas and Peloquin 1960;Ortiz 1998). A major obstacle in using wild species for breeding is the number of backcrosses that are required to reestablish the phenotype of a cultivar.…”

Section: Breeding For Abiotic Stress Tolerance In Potatomentioning

confidence: 99%

Adaptation of the Potato Crop to Changing Climates

Schafleitner

Ramírez

Jarvis

et al. 2011

Crop Adaptation to Climate Change

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Section: Breeding For Abiotic Stress Tolerance In Potatomentioning

confidence: 99%

Adaptation of the Potato Crop to Changing Climates

Schafleitner

Ramírez

Jarvis

et al. 2011

Crop Adaptation to Climate Change

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“…Wild Solanum species typically do not tuberize under the long photoperiod of a temperate summer. However, they can be crossed to dihaploids (2n = 2x = 24) of S. tuberosum, producing vigorous hybrids that will tuberize during the growing season (Hermundstad & Peloquin 1986, Hougas & Peloquin 1960.…”

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confidence: 99%

Transmission of Verticillium wilt resistance to tetraploid potato via unilateral sexual polyploidization

2006

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Verticillium wilt is a serious disease of potato and is caused by the soil-borne fungi Verticillium dahliae and V. albo-atrum. No major cultivar is resistant to this disease. Two diploid interspecific potato clones, C287 and C545, were previously identified with consistently high levels of Verticillium wilt resistance and are thought to have the same genotype for the loci that confer resistance to V. dahliae stem colonization. The purpose of this study was to determine whether resistance to V. dahliae stem colonization could be transferred to the tetraploid level in potato via unilateral sexual polyploidization (USP). Progenies in eight families obtained by crossing C287 and C545 to two tetraploid breeding clones, S438 and S440, and the cultivar 'Atlantic' were planted in a V. dahliae-infested field and a field without a significant V. dahliae infestation. Resistance was evaluated relative to C545 and C287. There were differences among families for stem colonization and yield. No differences between the mean stem colonization of C545 and C287 progeny were detected. Family differences due to the tetraploid parents indicate that they contributed resistance to the progeny. Stem colonization data from this experiment were consistent with the proposed complementary two-gene model for Verticillium wilt resistance in the diploid parents. Unilateral sexual polyploidization is an effective method for transferring V. dahliae stem colonization resistance to the tetraploid level.

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“…These comparisons will be best made on hybrids between S. tuberosum haploids and these species. Haploids have been successfully crossed with 23 diploid, 24-chromosome species, including S. vernei and S. canasense, representing 5 taxonomic series (Hougas and Peloquin, 1960). Meiotic studies, including pachytene, of the hybrids provide opportunities for genome comparison between S. tuberosum and its wild relatives.…”

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confidence: 99%

Pachytene Chromosomes of the Potato (Solanum Tuberosum, Group Andigena)

Yeh

Peloquin

1965

American J of Botany

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The morphology of the pachytene chromosomes of haploids (2n = 24) of Solanum tuberosum Group Andigena (2n = 48) is described. Chromosome identification is based primarily on the characteristics of chromatic regions, presence of distinct chromomere(s) in the achromatic regions, and the occurrence of prominent telochromomeres. Chromosomes V, XI and XII have approximately median centromeres. Chromosome II is associated with the nucleolus, and the variation in satellite size of this chromosome can be used as cytological marker for future studies. Comparisons of pachytene chromosomes from different haploids and their hybrids support the concept that the two genomes in Andigena are quite similar. The striking similarity between the potato and tomato chromosomes suggests interesting studies on the evolutionary relationships of these plants.

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Crossability ofSolanum tuberosum haploids with diploidSolanum species

Cited by 38 publications

References 9 publications

Adaptation of the Potato Crop to Changing Climates

Adaptation of the Potato Crop to Changing Climates

Transmission of Verticillium wilt resistance to tetraploid potato via unilateral sexual polyploidization

Pachytene Chromosomes of the Potato (Solanum Tuberosum, Group Andigena)

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