Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 537749
Title Drought response in field grown potatoes and the interactions between canopy growth and yield
Author(s) Aliche, Ernest B.; Oortwijn, Marian; Theeuwen, Tom P.J.M.; Bachem, Christian W.B.; Visser, Richard G.F.; Linden, Gerard van der
Source Agricultural Water Management 206 (2018). - ISSN 0378-3774 - p. 20 - 30.
DOI https://doi.org/10.1016/j.agwat.2018.04.013
Department(s) Laboratory of Plant Breeding
PBR Groei & Ontwikkeling
Laboratory of Genetics
EPS
PE&RC
WUR PB Abiotische Stress
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) AUC - Irrigation - Maturity - Rainfall - Stress
Abstract Potato is an important food crop with high yields. However when exposed to drought it suffers major yield losses. Considering its global importance and the increasing incidence of drought due to climate change, research toward drought tolerance in potato remains imperative. We have studied a set of 103 commercial cultivars representing the genetic diversity in the European potato market. The cultivars were grown in different field locations in three subsequent years (2013–2015). Our aim was to understand how different field drought regimes affect canopy growth in potato, and how these effects translate to tuber yield. The field environmental conditions were monitored, and pictures of canopy ground cover during the growing season were taken. Canopy growth parameters were extracted by an iterative method using the beta sigmoid growth function to model canopy growth. At harvest, tuber yield was scored and tuber size was graded. The GGE (Genotype and Genotype-by-Environment) bi-plot and Finlay Wilkinson's Regression were used to investigate Genotype x Environment interactions. We observed that the timing of the drought occurrence differentially affected canopy growth and tuber yield. Under drought stress, fast attainment of exponential growth and maximum canopy cover had negative effects on tuber formation and tuber bulking. Growth rate, maximum canopy cover, and area under the canopy curve (photosynthetic capacity over the growth season) were more important for tuber bulking than they were for tuber formation under drought stress. Cultivars with high yield were identified as potential material for improvement to drought tolerance. These findings will contribute to the breeding for drought-tolerant potato amidst the threats of climate change.
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