Genetic analysis of chilling tolerance of tomato seedling under low tem-perature using major gene-polygenes inheritance model
SU Baitong
YAN Shijiang
Abstract：In order to study the genetic inheritance of low temperature tolerance in tomato seedling stage,two tomato inbred lines XC-1 and XC-2 with different low temperature tolerance were selected to prepare F1,and then BC1,BC2,and F2 generations.The seedlings of six generations were treated with low temperature at the same time.The daytime temperature was 14 ℃with the light intensity of 30 pmol m-2·s-1 for 9 hours(8:00 am-5:00 pm),while the night temperature was 7 ℃ for 15 hours(5:00 pm-8:00 am).The relative humidity was 75％,and the total treatment time was 15 days.After the treat-ment,the classification of low temperature resistance was investigated,and the main gene-polygene combined genetic analysis method was used to study the genetic inheritance of low temperature tolerance.The results showed that the inheri-tance of low temperature tolerance of tomato seedlings was controlled by two pairs of additive major genes+additive-dom-inant polygenes.The heritability of major genes in BC1,BC2,F2 and other generations reached 57.357％,54.441％,68.463％,and the heritability of polygenes reached 6.607％,10.602％,2.994％,respectively.Major genes and polygenes have great influence,and the selection of this trait can be carried out in the early generation.
Keywords：TomatoLow temperature resistanceMajor gene-polygeneInheritance
Publication Date：2023-12-05
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 54-58 )