Association Mapping of Physiological and Morphological Traits Related to Crop Development under Contrasting Nitrogen Inputs in a Diverse Set of Potato Cultivars

Ample nitrogen (N) is required for potato production, but its use efficiency is low. N supply strongly interacts with maturity type of the cultivar grown. We assessed whether variation among 189 cultivars grown with 75 or 185 kg available N/ha in 2 years would allow detecting quantitative trait loci (QTLs) for relevant traits. Using phenotypic data, we estimated various traits and carried out a genome-wide association study (GWAS) with kinship correction. Twenty-four traits and 10,747 markers based on single-nucleotide polymorphisms from a 20K Infinium array for 169 cultivars were combined in the analysis. N level affected most traits and their interrelations and influenced the detection of marker-trait associations; some were N-dependent, others were detected at both N levels. Ninety percent of the latter accumulated on a hotspot on Chromosome 5. Chromosomes 2 and 4 also contained regions with multiple associations. After correcting for maturity, the number of QTLs detected was much lower, especially of those common to both N levels; however, interestingly, the region on Chromosome 2 accumulated several QTLs. There is scope for marker-assisted selection for maturity, with the main purpose of improving characteristics within a narrow range of maturity types, in order to break the strong links between maturity type and traits like N use efficiency.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:10

Enthalten in:

Plants (Basel, Switzerland) - 10(2021), 8 vom: 20. Aug.

Sprache:

Englisch

Beteiligte Personen:

Ospina Nieto, Cesar A [VerfasserIn]
Lammerts van Bueren, Edith T [VerfasserIn]
Allefs, Sjefke [VerfasserIn]
Vos, Peter G [VerfasserIn]
van der Linden, Gerard [VerfasserIn]
Maliepaard, Chris A [VerfasserIn]
Struik, Paul C [VerfasserIn]

Links:

Volltext

Themen:

Canopy development
Genome-wide association study
Journal Article
Maturity type
Nitrogen use efficiency
Solanum tuberosum

Anmerkungen:

Date Revised 31.08.2021

published: Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.3390/plants10081727

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM329945998