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 410327
Title Dynamics of senescence-related QTLs in potato
Author(s) Hurtado Lopez, P.X.; Schnabel, S.K.; Zaban, A.; Vetelainen, M.; Virtanen, E.; Eilers, P.; Eeuwijk, F.A. van; Visser, R.G.F.; Maliepaard, C.A.
Source Euphytica 183 (2012)3. - ISSN 0014-2336 - p. 289 - 302.
Department(s) Laboratory of Plant Breeding
Biometris (WU MAT)
Biometris (PPO/PRI)
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) solanum-tuberosum - model - growth - temperature - resistance - gene - chromosome-4 - markers - aflp
Abstract The study of quantitative trait’s expression over time helps to understand developmental processes which occur in the course of the growing season. Temperature and other environmental factors play an important role. The dynamics of haulm senescence was observed in a diploid potato mapping population in two consecutive years (2004 and 2005) under field conditions in Finland. The available time series data were used in a smoothed generalized linear model to characterize curves describing the senescence development in terms of its onset, mean and maximum progression rate and inflection point. These characteristics together with the individual time points were used in a Quantitative trait loci (QTL) analysis. Although QTLs occurring early in the senescence process coincided with QTLs for onset of senescence, the analysis of the time points made it difficult to study senescence as a continuous trait. Characteristics estimated from the senescence curve allowed us to study it as a developmental process and provide a meaningful biological interpretation to the results. Stable QTLs in the two experimental years were identified for progression rate and year-specific QTLs were detected for onset of senescence and inflection point. Specific interactions between loci controlling senescence development were also found. Epistatic interaction between QTLs on chromosomes 4, 5 and 7 were detected in 2004 and pleiotopic effects of QTLs on chromosomes 3 and 4 were observed in 2005.
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