Genetic variability of some agronomic traits in a collection of wheat (<em>Triticum turgidum</em> L. sp.pl.) genotypes under South Mediterranean growth conditions

Abstract

Genetic variability of some agronomic traits were investigated in 60 tetraploid wheat accessions (Triticum turgidum L. ssp) under rainfed conditions. The results indicated the presence of sufficient variability for all measured traits.The highest phenotypic and genotypic coefficient of variation was recorded for yield and awn length. High heritability coupled with high genetic advance and high expected response to selection recorded for thousand-grain weight, awn length, and the number of grains per spike. Cluster analysis grouped the 60 wheat genotypes into five clusters. Clusters are relatively formed according to the geographical origin of the genotypes. Cluster III carried entries having the best combinations for all the traits; in which genotypes PI 127106, PI 192658, PI 29051 and PI67343 can represent an important reservoir of useful genes for the development of new wheat cultivars. Thousand-grain weight, biomass, awn length and harvest index could be used as a selection criterion for hybridization programs in the future. Highlights - The genetic variability of 9 traits of 60 wheat varieties was investigated. - There was great variability among wheat genotype for all measured traits. - There were wheat varieties shows highest phenotypic and genotypic coefficient of variation. - Some wheat genotypes may be desired allele reservoirs. - Some traits can be an alternative in wheat selection.

Effect of genotype and environment on agronomical characters of alfalfa (Medicago sativa L.) in a typical acidic soil environment in southwest China

“…Wu et al (2018a) conducted a genetic diversity analysis on seven agronomic traits, including PH, FW, and DW, and the results showed that the CV of each trait was >10%. The CV of each trait in this study was high (>5%, RSL CV <5% only for 2019-2020, Tables 3-5), which could be regarded as producing large variation (Bendjama and Ramdani, 2022), indicating that the agronomic traits in this study are rich in genetic diversity. The richer the genetic diversity of a species, the greater its ability to adapt to its environment and its evolutionary potential (Nevo et al, 2012).…”

Exploitation of the Genetic Variability of Diverse Metric Traits of Durum Wheat (Triticum turgidum L. ssp. durum Desf.) Cultivars for Local Adaptation to Semi-Arid Regions of Algeria

“…Bendjama and Ramdani (2022) [20] also observed high heritability for most agromorphological traits in local durum wheat varieties grown in Algeria. However, broadsense heritability varies depending on the population and environmental conditions [41], and it does not reveal the specific genetic mechanisms underlying the traits [19].…”

“…Genetic and non-genetic parameters, such as phenotypic (CV p ) and genotypic coefficient of variation (CV g ), along with heritability (h 2 bs ), serve as valuable biometric indicators for assessing the genetic variation and adaptability within a germplasm collection. They provide insights into the relative contributions of genetic and environmental factors to observed variations in specific traits among individuals [19][20][21].…”