Multivariate Analysis Techniques and Tolerance Indices for Detecting Bread Wheat Genotypes of Drought Tolerance

Diversity, Journal Year: 2024, Volume and Issue: 16(8), P. 489 - 489

Published: Aug. 10, 2024

Drought stress is one of the biggest hardships in wheat cultivation because strong negative relationship between water deficit and crop yields owing to a lower grain weight, shorter grain-filling period, slower rate, reduced quality. Genotype–environment interaction (GEN:ENV) generates selecting genotypes ideotypes due biased genetic estimates. Diverse strategies have been proposed respond urgent need for concurrent improvements yield performance stability. This study’s purpose was appraise variation GEN:ENV effects on components discover drought-stress-tolerant ideotypes. study evaluated 20 three consecutive seasons under non-stressful drought-stress conditions total six ENVs. The broad-sense heritability ranged from 0.54 0.82 based expected mean squares 0.60 0.90 plot mean, but other ways, it usually greater than 0.90. high values (σgen:env2) revealed effect that has expression traits. G01, G03, G06, G07, G08, G10, G12, G13, G16, G17, G18 were stable (GY), according additive main multiplicative biplot Based scores weighted average absolute (WAASB), G02, G04, G05, selected as high-performance GY, they all best genotype groups using WAASB-GY superiority index. From results obtained principal component analysis hierarchical clustering tolerance discrimination indices, G18, G19 are produce suitable conditions. In essence, combining approaches take into consideration stability can contribute significantly enhancing reliability recommendations novel genotypes.

Language: Английский

Assessing Heat Stress Tolerance of Wheat Genotypes through Integrated Molecular and Physio-Biochemical Analyses

Agronomy, Journal Year: 2024, Volume and Issue: 14(9), P. 1999 - 1999

Published: Sept. 2, 2024

Heat as an abiotic stress significantly impairs the sustainable productivity of wheat (Triticum aestivum L.). To determine tolerance genotypes to heat stress, a comprehensive approach should be used that integrates simultaneous phenotyping and genotyping analyses. The aim this study is identify local heat-tolerant using simple sequence repeat (SSR) markers evaluate selected under field conditions for their stress. Of 12 SSR showed polymorphism, eight were associated with six important traits. use hierarchical cluster analysis (HC) based on led identification 13 varying results grouped into three distinct classes: tolerant (T), moderately (MT), sensitive (S). had significant effect 19 traits study, variation in between genotypes. exhibited range average thousand-kernel weight (TKW) values 40.56 44.85, while genotype (Yecora Rojo) TKW 35.45. Furthermore, two times higher levels antioxidants compared when exposed Among analyzed, favorable combination high heritability (>60%) genetic gain (>20%). Through integration principal component stepwise multiple linear regression, it was determined (grain yield, 1000-kernel weight, plant height, intercellular carbon dioxide, flag leaf area, grain filling duration) revealed differences HC resulted same division main categories observed markers. It worth noting Saudi wheat, including KSU106, KSU105, KSU115 genotypes, addition 16HTWYT-22 genotype, other tested, indicating its potential suitability agriculture Arabia. These contribute breeding programs focused developing varieties accelerate progress improvement programs.

Language: Английский

Identification of Molecular Markers Associated with Genomic Regions Controlling Agronomic Traits in Bread Wheat Genotypes Under Different Moisture Conditions

Plant Molecular Biology Reporter, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 5, 2024

Language: Английский