Gamma rays induced genetic variability in tomato (Solanum lycopersicum L.) germplasm
Küçük Resim Yok
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The present study assessed the effectiveness of gamma radiation in inducing favorable genetic variability in tomato (Solanum lycopersicum L.). An experiment was conducted in a randomized complete block design to produce M-1 generation. Significant differences were observed among the genotypes as well as between the treatments at individual plant level based on observed traits (seed germination percent-age, seedling survival, plant height, number of flower clusters plant(-1), number of flowers and fruits plant(-1)). All observed characters in the mutagenized population were adversely affected with increasing radiation dose. Results identified 450 Gy as the most damaging radiation dose followed by 300 Gy and 150 Gy. Moreover, 300 Gy treatment was identified as lethal dose (LD50) as it caused a 50% germination inhibition in almost all the evaluated genotypes. The 150 Gy treatment showed the least damaging impact and induced maximum genetic variability in almost all the genotypes under study. Character association studies were also conducted which could be utilized in the selection of desirable mutants. Correlation studies revealed an altered association among the observed parameters from positive to neg-ative direction in 300 Gy and 450 Gy treatments as compared to control. These deviations in correlation coefficients proved that mutagenesis can break the linkage among specific loci. Furthermore, path coefficient analysis identified the growth attributes with an effective direct and indirect contribution in yield.(c) 2022 The Author(s). Published by Elsevier B.V. on behalf of King Saud University.
Açıklama
Anahtar Kelimeler
Tomato, Induced mutation, Gamma radiation, Lethal dose, Genetic variability, Character association studies
Kaynak
Saudi Journal of Biological Sciences
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
29
Sayı
5
