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 509180
Title Breeding for postharvest performance in chrysanthemum by selection against storage-induced degreening of disk florets
Author(s) Geest, Geert van; Post, Aike; Arens, Paul; Visser, Richard G.F.; Meeteren, Uulke van
Source Postharvest Biology and Technology 124 (2017). - ISSN 0925-5214 - p. 45 - 53.
DOI https://doi.org/10.1016/j.postharvbio.2016.09.003
Department(s) Laboratory of Plant Breeding
WUR PB Siergewassen, Tissue Culture
EPS
PE&RC
Horticulture and Product Physiology Group
Publication type Refereed Article in a scientific journal
Publication year 2017
Abstract Breeding for postharvest performance in ornamentals is challenging, since many different deteriorative processes determine vase life. In order to improve postharvest performance by breeding, selection should take place on these processes separately. To define processes that are important for chrysanthemum postharvest performance, vase life was assessed after two weeks of cold storage in a set of 44 chrysanthemum cultivars. Since disk floret degreening was the most frequent reason for ending vase life, we further investigated this trait in a large biparental population (n = 381). To quantify disk floret degreening in this large number of genotypes, we developed a high-throughput phenotyping method. The method consists of the quantification of loss of green color as expressed by an increase of intensity of red divided by the intensity of green (R/G) in dark-held detached capitula. R/G increases when disk florets lose green color. The increase in R/G correlated significantly with the number of days until disk floret degreening occurred during vase life. This was the case for the 44-cultivar cultivar panel (Pearson’s correlation coefficient (ρ) of −0.70; p < 0.0001) as well as in a subset of the biparental pulation (n = 145; ρ = −0.67; p < 0.0001). R/G increase segregated in a quantitative manner in the full biparental population, and had a moderately high heritability of 0.73. Carbohydrate content after harvest was measured in a smaller subset of the biparental population (n = 55). The R/G increase correlated with carbohydrate content (ρ=-0.56; p < 0.0001). Since carbohydrate content did not explain all variation in degreening sensitivity, we discuss different possible mechanisms to cope with carbohydrate starvation and avoid degreening. In conclusion, disk floret degreening is an important postharvest trait in chrysanthemum, and it is related to carbohydrate starvation. The quantitative segregation suggests involvement of multiple alleles, probably at multiple loci. The moderately high heritability makes it a suitable trait for QTL mapping, which we will commence in the near future.
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