Ortiz Rios, Rodomiro Octavio and Reslow, Fredrik and Crossa, Jose and Cuevas, Jaime
(2021).
Heritable Variation, Genetic and Phenotypic Correlations for Tuber Traits and Host Plant Resistance to Late Blight for Potato Breeding in Scandinavian Testing Sites.
Agriculture. 11
, 1287
[Research article]
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Abstract
Potato breeding aims to improve crop productivity, quality and resilience based on heritable
characteristics. Estimating the trait heritability and correlations—both genetic and phenotypic—among
characteristics in a target population of environments allows us to define the best breeding method
that leads to selection gains. Breeding clones (47) and released cultivars (209) were grown using
simple lattice designs at three testing sites in northern and southern Sweden to estimate the best
linear unbiased predictors (BLUPs) derived from mixed linear models for characteristics such as tuber
weight (total and according to sizes), host plant resistance to late blight (caused by the oomycete
Phytophthora infestans) and tuber quality (starch percentage based on specific gravity measurements
and reducing sugars). There was significant heritable variation for all the characteristics investigated.
Tuber starch percentage and total tuber weight were the traits with the highest broad-sense heritability
(H2), while the weight for the smallest size (<40 mm) had the highest H2 among the different tuber
categories. These results show the potential for further improving these traits for Scandinavia through
recombination and selection in segregating offspring. The genetic and phenotypic correlations among
the tuber weight characteristics were significant (p 0.05) irrespective of their sizes, but none were
significant (p > 0.05) with tuber starch percentage. Host plant resistance to late blight was negatively
and significantly associated with tuber weight and starch percentage, thereby showing the strong
effects of this disease on the productivity and quality of the potatoes.
| Authors/Creators: | Ortiz Rios, Rodomiro Octavio and Reslow, Fredrik and Crossa, Jose and Cuevas, Jaime | ||||
|---|---|---|---|---|---|
| Title: | Heritable Variation, Genetic and Phenotypic Correlations for Tuber Traits and Host Plant Resistance to Late Blight for Potato Breeding in Scandinavian Testing Sites | ||||
| Series Name/Journal: | Agriculture | ||||
| Year of publishing : | 2021 | ||||
| Volume: | 11 | ||||
| Article number: | 1287 | ||||
| Number of Pages: | 10 | ||||
| ISSN: | 2077-0472 | ||||
| Language: | English | ||||
| Publication Type: | Research article | ||||
| Article category: | Scientific peer reviewed | ||||
| Version: | Published version | ||||
| Copyright: | Creative Commons: Attribution 4.0 | ||||
| Full Text Status: | Public | ||||
| Subjects: | (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Genetics and Breeding (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Horticulture | ||||
| Keywords: | Phytophthora infestans, Solanum tuberosum, best linear unbiased predictors, broad-sense heritability, indirect selection, restricted selection index, trait associations | ||||
| URN:NBN: | urn:nbn:se:slu:epsilon-p-114937 | ||||
| Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114937 | ||||
| Additional ID: |
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| ID Code: | 26350 | ||||
| Faculty: | LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap | ||||
| Department: | (LTJ, LTV) > Department of Plant Breeding (from 130101) | ||||
| Deposited By: | SLUpub Connector | ||||
| Deposited On: | 20 Dec 2021 09:26 | ||||
| Metadata Last Modified: | 20 Dec 2021 09:31 |
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