Genotypic Differences in Agro-Physiological, Yield and Yield-Related Traits Responses to Saline Field Environment for Rice Genotypes through Line x Tester Analysis | ||
| Journal of Plant Production | ||
| Article 3, Volume 15, Issue 12, December 2024, Pages 789-802 PDF (1.82 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2024.339493.1418 | ||
| Authors | ||
| Walid F. Ghidan; M. E. Negm* ; M. M. Abdelhamed; I. A. Talha; A. G. Abdelfatah; Dina Abdulmajid | ||
| Rice Research Department, Field Crops Research Institute, Agricultural Research Center, 33717 Kafr El-Sheikh, Egypt. | ||
| Abstract | ||
| Rice is confronted with various abiotic stress factors during growth due to the challenges presented by global climate change, which poses a major risk to overall productivity and development. Salinity is considered the most serious abiotic stress that significantly affects yield stability among all other factors. Twenty-four hybrids generated from the combination of six lines with four new introgression testers were assessed along with their respective parents for the extent of physiological and yield potential-related traits under saline field conditions. A wide range of variability was observed among genotypes, the magnitude of SCA variance was higher than the GCA variance for all the traits, revealing the predominance of non-additive gene action. The promising line GZ 10101-5-1-1-1 was identified as a potential good combiner genotype for peroxidase, superoxide dismutase, proline, malondialdehyde, and hydrogen peroxide contents. Furthermore, it was found that Giza 178, Sakha 104, AR 278-41-1-1-6-3, and IHL 296 were effective general combiners for improving grain yield. Three cross combinations Giza 178/IHL 180, Sakha 104/IHL 296, and Sakha 109/IHL 185 exhibited favorable SCA effects for antioxidant enzyme activity. The cross-combination Sakha 104/IHL 249 was considered a good specific combiner for yield and certain yield-related traits. The highly positive significant heterobeltiosis was observed for antioxidant enzyme activity, malondialdehyde, and hydrogen peroxide concentrations by the cross-combination AR 278-41-1-1-6-3/IHL 185. In addition, the hybrid combinations Giza 178/IHL 296, Sakha 104/IHL 180, and Sakha 104/IHL 296 were found to have highly significant heterobeltiosis effects for yield and related traits under a saline field environment. | ||
| Keywords | ||
| Rice; salinity; heterobeltiosis; yield | ||
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