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Sammanfattning

Potato breeding aims to improve crop productivity, quality and resilience based on heritablecharacteristics. Estimating the trait heritability and correlations—both genetic and phenotypic—amongcharacteristics in a target population of environments allows us to define the best breeding methodthat leads to selection gains. Breeding clones (47) and released cultivars (209) were grown usingsimple lattice designs at three testing sites in northern and southern Sweden to estimate the bestlinear unbiased predictors (BLUPs) derived from mixed linear models for characteristics such as tuberweight (total and according to sizes), host plant resistance to late blight (caused by the oomycetePhytophthora infestans) and tuber quality (starch percentage based on specific gravity measurementsand 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 ( 0.05) with tuber starch percentage. Host plant resistance to late blight was negativelyand significantly associated with tuber weight and starch percentage, thereby showing the strongeffects of this disease on the productivity and quality of the potatoes.

Nyckelord

Phytophthora infestans; Solanum tuberosum; best linear unbiased predictors; broad-sense heritability; indirect selection; restricted selection index; trait associations

Publicerad i

Agriculture
2021, volym: 11, nummer: 12, artikelnummer: 1287

SLU författare

Associerade SLU-program

SLU Nätverk växtskydd

Globala målen (SDG)

SDG2 Ingen hunger

UKÄ forskningsämne

Jordbruksvetenskap
Genetik och förädling inom lantbruksvetenskap
Trädgårdsvetenskap/hortikultur

Publikationens identifierare

  • DOI: https://doi.org/10.3390/agriculture11121287

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/114937