Assessment of morphophysiological traits for selection of heat-tolerant potato genotypes

Authors : Ufuk DEMİREL, Sevgi ÇALIŞKAN, Caner YAVUZ, İlknur TINDAŞ, Zsolt POLGAR, Zsolt VASZILY, İstván CERNÁK, Mehmet Emin ÇALIŞKAN

Pages : 218-232

View : 16 | Download : 9

Publication Date : 2017-06-01

Article Type : Research Paper

Abstract :Since potato production has been expanded into warmer regions, breeding heat-tolerant potato varieties has also been considered among the top priorities in most breeding programs in recent years. Identification of traits related to heat tolerance in potato is crucial for selection of heat-tolerant genotypes. The objective of this study was to evaluate the responses of 17 potato genotypes to high temperature stress for identifying some candidate traits associated with heat tolerance. Haulm dry weight insert ignore into journalissuearticles values(HDW);, leaf area index insert ignore into journalissuearticles values(LAI);, photosynthetic rate insert ignore into journalissuearticles values(Pn);, stomatal conductance insert ignore into journalissuearticles values(Gs);, transpiration rate insert ignore into journalissuearticles values(Tr);, SPAD value, and mean tuber weight insert ignore into journalissuearticles values(MTW); of potato genotypes at control conditions were significantly and positively correlated with tuber yield of genotypes grown under high temperature conditions, whereas canopy temperature insert ignore into journalissuearticles values(CT); was negatively associated with tuber yield. Classification of potato genotypes based on heat tolerance was done by principal component analysis with yield-correlated traits. The classification results showed high similarities with the yield performance of genotypes grown under high temperature conditions. The HDW, LAI, Pn, Gs, Tr, CT, and SPAD of potato genotypes grown under normal conditions might be useful traits to screen for heat-tolerant genotypes.
Keywords : Potato, screening, heat tolerance