True Potato Seed: Changing Potato Propagation from Vegetative to Sexual

Pallais, N.

doi:10.21273/hortsci.26.3.239

Cited by 15 publications

(5 citation statements)

References 19 publications

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“…It was used in small scale only when the yields decreased due to tuber tiring' and `degeneration' . This deterioration is most likely due to virus disease accumulation in the tubers, Propagation by botanical seeds will eliminate several of these diseases which are not seed transmitted, resulting in `clean tubers' (Pallais, 1991) . The preferred cultivar for sexual propagation is 'Q'ompis', which is the most popular, followed by 'K'usi' and `Bole', (Quiros et al, 1990) .…”

Section: Resultsmentioning

confidence: 99%

Increase of potato genetic resources in their center of diversity: the role of natural outcrossing and selection by the Andean farmer

Quirós

Ortega

Raamsdonk³

et al. 1992

Genet Resour Crop Evol

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The Andean farmer conserves and maintains the existing genetic diversity of potato cultivars by means of clonal propagation of tubers . However, surveys of traditional farms showed that botanical seed propagation was used for disease elimination, stock rejuvenation and the creation of new cultivars . Electrophoretic surveys based on 542 tubers collected from 18 markets sampled in the Cusco area disclosed a total of 229 different cultivars from diploid, triploid and tetraploid forms of Solanum tuberosum L . These could be classified by isozyme cluster analysis into four major groups and six minor groups . However, they did not agree with groups based on flesh or skin color . It is therefore concluded that all genotypes belong to a single, large gene pool with considerable gene flow between cultivars of different groups . When the samples were grouped by the three most common tuber skin colors, namely red/pink ('Q'ompis type'), purple ('Yana Imilla' type), and yellowish/brown ('Yuraq Kusi' type), similar allozymes were observed in all three classes . The structure of the isozymic phenotypes within each group indicate that they may have been derived as segregants after outcrossing of diverse parental types . In order to provide further evidence for the origin of new types by hybridization, two segregating diploid progenies were generated by crossing purple by yellow skin types . In the resulting F1, most of the tuber phenotypes observed in the Andean varieties were reproduced in these crosses . It can be concluded that the Andean potatoes form a large and plastic gene pool amplified and renovated by outcrossing followed in some cases by human selection of desirable phenotypes .

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Section: Resultsmentioning

confidence: 99%

Increase of potato genetic resources in their center of diversity: the role of natural outcrossing and selection by the Andean farmer

Quirós

Ortega

Raamsdonk³

et al. 1992

Genet Resour Crop Evol

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“…For many years the production of ware potatoes from true potato seed (TPS) has had high priority in the research carried out at the International Potato Center (CIP), Lima, Peru (Pallais, 1991).…”

Section: Additional Index Word Solarium Tuberosummentioning

confidence: 99%

Correlation between Early and Late Growth Characters in an Improved True Potato Seed Population

Golmirzaie¹,

Serquén²

1992

HortSci

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A field experiment was conducted at two locations to determine the correlation between seedling and mature plant characters in a large potato (Solanum tuberosum) population developed for production from true potato seed. There was no significant correlation between seedling and reproductive characters, including earliness, at the two locations. Number of internodes and yield per plant were significantly correlated at Huancayo, and at San Ramon, root length and hypocotyl length had a significant correlation with the number of tubers per plant and yield per plant. Although significant, the latter correlations are not high enough to be used to predict the final behavior of genotypes by their seedling traits. Thus, it may be assumed that a certain independence between seedling and mature plant growth characters exists.

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“…Among these, one topic which has garnered significant interest over the past few decades is adapting the tetraploid potato (2n = 4x = 48) to a diploid hybrid breeding system (2n = 2x = 24) [ 8 , 9 ]. The appeal of diploid hybrid potato (DHP) breeding is understood to consist of benefits such as the use of true potato seed (TPS) directly in varietal evaluation [ 10 ], a segmented breeding program design [ 11 ], exploitation of heterotic vigor [ 12 ], and more efficient systems for germplasm production and dissemination [ 13 ]. With the gradual emergence of fertile diploid lines [ 14 , 15 ], research centered around diploid and hybrid potato breeding is gaining momentum across the world [ 9 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Efficient Genomic Prediction of Yield and Dry Matter in Hybrid Potato

Adams

Vries²,

Eeuwijk

2023

Plants

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There is an ongoing endeavor within the potato breeding sector to rapidly adapt potato from a clonal polyploid crop to a diploid hybrid potato crop. While hybrid breeding allows for the efficient generation and selection of parental lines, it also increases breeding program complexity and results in longer breeding cycles. Over the past two decades, genomic prediction has revolutionized hybrid crop breeding through shorter breeding cycles, lower phenotyping costs, and better population improvement, resulting in increased genetic gains for genetically complex traits. In order to accelerate the genetic gains in hybrid potato, the proper implementation of genomic prediction is a crucial milestone in the rapid improvement of this crop. The authors of this paper set out to test genomic prediction in hybrid potato using current genotyped material with two alternative models: one model that predicts the general combining ability effects (GCA) and another which predicts both the general and specific combining ability effects (GCA+SCA). Using a training set comprising 769 hybrids and 456 genotyped parental lines, we found that reasonable a prediction accuracy could be achieved for most phenotypes with both zero common parents (ρ=0.36−0.61) and one (ρ=0.50−0.68) common parent between the training and test sets. There was no benefit with the inclusion of non-additive genetic effects in the GCA+SCA model despite SCA variance contributing between 9% and 19% of the total genetic variance. Genotype-by-environment interactions, while present, did not appear to affect the prediction accuracy, though prediction errors did vary across the trial’s targets. These results suggest that genomically estimated breeding values on parental lines are sufficient for hybrid yield prediction.

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True Potato Seed: Changing Potato Propagation from Vegetative to Sexual

Cited by 15 publications

References 19 publications

Increase of potato genetic resources in their center of diversity: the role of natural outcrossing and selection by the Andean farmer

Increase of potato genetic resources in their center of diversity: the role of natural outcrossing and selection by the Andean farmer

Correlation between Early and Late Growth Characters in an Improved True Potato Seed Population

Efficient Genomic Prediction of Yield and Dry Matter in Hybrid Potato

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