000			02708nab a22003617a 4500
003			EC-PaCDF
005			20171204142852.0
008			170725t20132013xxu|||||||||||||||||eng||
040			_aEC-PaCDF
041			_aeng
082	0	4	_222 _a593.9593
100	1		_aLucatti, Alejandro F.
245	1	0	_aDifferences in insect resistance between tomato species endemic to the Galapagos Islands.
520	0		_aBackground: The Galapagos Islands constitute a highly diverse ecosystem and a unique source of variation in the form of endemic species. There are two endemic tomato species, Solanum galapagense and S. cheesmaniae and two introduced tomato species, S. pimpinellifolium and S. lycopersicum. Morphologically the two endemic tomato species of the Galapagos Islands are clearly distinct, but molecular marker analysis showed no clear separation. Tomatoes on the Galapagos are affected by both native and exotic herbivores. Bemisia tabaci is an important introduced insect species that feeds on a wide range of plants. In this article, we address the question whether the differentiation between S. galapagense and S. cheesmaniae may be related to differences in susceptibility towards phloem-feeders and used B. tabaci as a model to evaluate this. Results: We have characterized 12 accessions of S. galapagense,22ofS. cheesmaniae, and one of S. lycopersicum as reference for whitefly resistance using no-choice experiments. Whitefly resistance was found in S. galapagense only and was associated with the presence of relatively high levels of acyl sugars and the presence of glandular trichomes of type I and IV. Genetic fingerprinting using 3316 SNP markers did not show a clear differentiation between the two endemic species. Acyl sugar accumulation as well as the climatic and geographical conditions at the collection sites of the accessions did not follow the morphological species boundaries. Conclusion: Our results suggest that S. galapagense and S. cheesmaniae might be morphotypes rather than two species and that their co-existence is likely the result of selective pressure
546			_aEnglish
653			_aBemisia tabaci.
653			_aSolanum galapagense.
653			_aSolanum cheesmaniae.
653			_aWhitefly.
653			_a Mosca blanca.
653			_aTrichomes.
653			_aTricomas.
653			_aAcyl sugars.
653			_aAzúcares de acilo.
653			_aSelection pressure.
653			_aSelección presión.
700	1		_aVan Heusden, Adriaan W.
700	1		_aDe Vos, Ric C.
700	1		_aVisser, Richard G.
700	1		_aVosman, Ben.
773	0	4	_gVol. 13, no. 175 (2013), p. 1-12 _tBMC Evolutionary Biology.
942			_2ddc _cARTICLE
999			_c13065 _d13065