Large variation in mycorrhizal colonization among wild accessions, cultivars, and inbreds of sunflower (Helianthus annuus L.)
- 324 Downloads
Arbuscular mycorrhizal (AM) fungi (AMF) establish beneficial symbioses with the roots of the majority of land plants, including major food crops. The susceptibility of sunflower (Helianthus annuus) to AMF was studied in 26 genotypes—nine wild accessions, 11 cultivars and six inbred lines—by assessing mycorrhizal root colonization in individual plants, with the aim of gaining insights into the genetic control of this trait. The analysis of genetic diversity among sunflower wild accessions, cultivars, and inbred lines, performed by retrotransposon display (multilocus fingerprinting), showed large variability among the analysed genotypes, with wild accessions more variable than domesticated genotypes. Wild accessions were also more susceptible to mycorrhizal colonization than cultivars. Nevertheless, analyses of inbred lines revealed a low repeatability value of the mycorrhizal colonization trait, suggesting the absence of a clearcut genetic control; variability should therefore mostly reflect environmental effects.
KeywordsArbuscular mycorrhizal fungi Helianthus annuus Mycorrhizal susceptibility Sunflower inbreds Wild accessions versus cultivars
This work was funded by the University of Pisa (Fondi di Ateneo) and by C.N.R.
- Falconer DS (1981) Introduction to quantitative genetics, 2nd edn. Longman, New YorkGoogle Scholar
- Gallaud I (1905) Études sur les mycorrhizes endotrophes. Rev Gén Bot 17:5–48, 66–83, 123–136, 223–239, 313–325, 425–433, 479–500Google Scholar
- Jaccard P (1908) Nouvelles recherches sur la distribution florale. Bull Soc Vaud Sci Nat 44:223–270Google Scholar
- Putt ED (1978) History and present world status. In: Carter J (ed) Sunflower science and technology. Am Soc Agron, Madison, pp 1–30Google Scholar
- Rohlf FJ (2000) NTSys-pc: numerical taxonomy and multivariate analysis system, version 2.1. Exeter Software, New YorkGoogle Scholar
- Semelczi-Kovacs A (1975) Acclimatization and dissemination of the sunflower in Europe. Acta Ethnogr Acad Sci Hung 24:47–88Google Scholar
- Smith SE, Read DJ (2008) Mycorrhizal symbiosis. Academic Press, LondonGoogle Scholar
- Yücel C, Özkan H, Ortaş I, Yağbasanlar T (2009) Screening of wild emmer wheat accessions (Triticum turgidum subsp. dicoccoides) for mycorrhizal dependency. Turk J Agric For 33:513–523Google Scholar