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Lactuca, Uzbekistan, 2019


Collectors: C. Kik (the Netherlands), F.O. Khasanov and A. Makhmudov (Uzbekistan)

Introduction

In the global plant genetic database GENESYS, 16519 Lactuca accessions are present amongst which 12,980 Lactuca sativa L. and 3539 crop wild relatives (CWR). Lactuca altaica Fisch. & C.A. Mey. is present in this database with only 34 accessions, of which 10 originate from Uzbekistan. Lactuca serriola L. is ubiquitous present in GENESYS with 2141 accessions of which 61 originate from Uzbekistan. In total CGN maintains 5 and 803 accessions of L. altaica and L. serriola respectively and from Uzbekistan CGN holds 1 and 53 accessions of L. altaica and L. serriola respectively.

According to Web of Science L. serriola has often been a subject of study (n= 531). However this is not the case for L. altaica as only 12 records were found. Possibly this is due to the fact that many taxonomists view L. altaica as a synonym of L. serriola (Cichoriaea Portal; www.cichoriaea.e-taxonomy.net/portal) and therefore report findings for this species under the species name of L. serriola. Both species belong to the primary genepool of lettuce (Zohary 1991) and L. serriola has been (and is) used to a large extent in the breeding of new lettuce cultivars (e.g. Lebeda et al 2014). Furthermore it is known that both species can be intercrossed successfully (Lindquist 1960).

The distribution area of both species is quite different, whereas L. serriola is a cosmopolitan species, L. altaica can be found in the region in between East Anatolia to West China (Lebeda et al 2004; Fig. 1).

Given the fact that only a few accessions of Lactuca altaica are present in genebanks worldwide and that the species could harbour agronomically interesting traits, a collecting mission to Uzbekistan, a country that is located within the centre of biodiversity of the species, is clearly warranted (photo upper right).

Therefore in the context of an already existing joint plant genetic resources cooperation between the Uzbek Academy of Sciences (Uzbekistan) and CGN (the Netherlands), a collecting project was set-up to sample Lactuca altaica. For L. serriola the need to collect in Uzbekistan is less compared to L. altaica. However, large areas in this country were not yet explored as previous collecting only took place in the eastern part of the country. Therefore, collecting in this expedition took place primarily in the central and southern part of the country.

The collecting mission resulted in the sampling of seeds ca. 2500 plants from a total of 62 populations. Probably 21 populations consisted of Lactuca altaica, 28 of Lactuca serriola and 13 populations consisted of both taxa.

Documents and material

All material and accompanying documentation concerning this expedition is currently, for a limited period, only available to sponsors of this mission.