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Heritable Variation, Genetic and Phenotypic Correlations for Tuber Traits and Host Plant Resistance to Late Blight for Potato Breeding in Scandinavian Testing Sites

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:
Type of IDID
DOI10.3390/agriculture11121287
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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