Evaluation of tomato genotypes for high temperature tolerance using certain reproductive and fruit traits by factor analysis

Authors : Nuray ÇÖMLEKÇİOĞLU, Mustafa Kemal SOYLU, Murat OLGUN

Pages : 190-196

View : 26 | Download : 11

Publication Date : 2020-12-30

Article Type : Research Paper

Abstract :High atmosphere temperature is the most significant environmental factor and its negative impact on plant growth and productivity causes large losses in agricultural production. Fourteen tomato genotypes insert ignore into journalissuearticles values(G1;U64-16, G2;U4-10, G3;U2-29, G4;U117-2 G5; CLN1621L, G6; BL1176, G7; CLN2418A, G8; BL1175, G9; BL1173, G10; CLN2001A, G11; CLN2413R, G12; CL5915-93D4-1-0-3, G13; BL1174, and G14; CLN2498E); were evaluated at three temperature conditions. Three field experiment was carried out at optimum insert ignore into journalissuearticles values(OT, 28/21°C day/night);, moderate high temperature insert ignore into journalissuearticles values(MHT, 32/22°C day/night); and high temperature insert ignore into journalissuearticles values(HT, 37/27°C day/night); conditions. Fruit set rate insert ignore into journalissuearticles values(Fr.S);, number of produced pollen grains per flower insert ignore into journalissuearticles values(P.Pr);, number of released pollen per flower insert ignore into journalissuearticles values(P.R);, percentage of viable pollen insert ignore into journalissuearticles values(P.Via);, in vitro pollen germination insert ignore into journalissuearticles values(P.Ger);, number of seed per fruit insert ignore into journalissuearticles values(S./Fr);, aborted fruit rate insert ignore into journalissuearticles values(A.Fr);, fruit weight insert ignore into journalissuearticles values(Fr.We);, fruit length insert ignore into journalissuearticles values(Fr.Len);, fruit diameter insert ignore into journalissuearticles values(Fr.Dia); and seed germination insert ignore into journalissuearticles values(S.Ger); were scored. The temperature damage threshold was determined for the mentioned properties. The temperature slightly over the OT reduced the pollen characteristics, Fr.S and S./Fr.The results revealed that the P.R, P.Pr and P.Ger were the most important factors to determine the fruit set under for the temperatures above the optimum and could be used in breeding programs aiming to obtain better fruit set under HT. The P.Pr and P.R were readily affected by the increase in temperature compared to P.Ger and P.Via. The damage threshold temperature was 43.9 °C for P.Ger and 45.9 °C for P.Via.
Keywords : Heat stress, pollen, damage threshold, biplot, climate change