Iranian Journal of Horticultural Science

Iranian Journal of Horticultural Science

‎ Estimation of genetic‎ parameters and heritability for yield and yield components in ‎tomato through generation mean analysis

Document Type : Full Paper

Authors
Meysam Safaee 1
Jamal-Ali Olfati 2
Yousef Hamidoghli 2
Babak Rabiei 3
1 Former Ph.D. Student,, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran‎
2 Associate Professor,, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran‎
3 Professor, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran‎
10.22059/ijhs.2022.332921.1981
Abstract
Tomato is an interesting vegetable crop and numerous genetic studies have been conducted to increase the efficiency of tomato breeding strategies. Yield is an economically important trait and therefore improving yield is the main focus in breeding projects. The selecting efficient breeding strategy needs comprehensive information about the genetic controlling of interested traits. The aim of this study was to determine genetic parameters for yield and yield component tomato through generation mean analysis. Generation mean analysis was conducted using six basic generations (P1, P2, F1, F2, BC1, BC2) derived from a cross between two lines (M110 and P110) of tomato. M110 and P110 have a determinate and indeterminate growth habit respectively. Results showed that a simple additive dominance model was adequate to explain variability among traits of interest. Non-additive gene effects were predominant for all characters in this study. Broad sense heritability was calculated at over 50% for all traits while narrow sense heritability was less than 50%. Therefore, direct selection for these traits might not be useful, and recurrent selection procedures could increase the frequency of favorable alleles in breeding populations to enable the selection and development of genotypes with superior plants.
Keywords
Additive effect
complementary epistasis
dominance effect
fruit weight
Subjects
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Iranian Journal of Horticultural Science
Volume 53, Issue 4
Winter 2023
Pages 917-926

  • Receive Date 12 December 2021
  • Revise Date 01 July 2022
  • Accept Date 09 July 2022