Estimation of broad-sense heritability and variance components for seed yield and agronomic traits in native and exotic safflower (Carthamus tinctorius L.) genotypes

Abstract

This study was conducted to estimate broad-sense heritability and variance components for seed yield and some agronomic traits in 100 safflower genotypes. The experiments were carried out in two years at two locations in Iran. The number of seeds per capitol and harvest index had the highest genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV), respectively. The estimated broad-sense heritability for plant height, days to physiological maturity, 1000-seed weight, days to flowering, number of seeds per capitol, number of capitols per plant and seed yield were 86, 76, 74, 70, 68, 44 and 16%, respectively. It was found that plant height, days to physiological maturity, 1000-seed weight, days to flowering and number of seeds per capitol were the least influenced by the environment. The number of capitols per plant and seed yield were most affected by the environment.

Identification of genetic basis associated with agronomic traits in a global safflower panel using genome-wide association study

“…Accession × Location interaction was not significant for the studied traits except seed yield per plant proposing that selections made in one location can be usefully exploited in the other location, which can expedite the process of cultivar development and cut the costs associated with this activity. The significant Accession × Location interaction for seed yield per plant was in accordance with the results of Tahernezhad et al (2018), but it contrasted with their findings for plant height, capitula per plant, and seeds per capitulum. A significant Accession × Location interaction for the studied traits shows that the tested safflower accessions had dissimilar behavior in different locations and vice versa.…”

Selections of donors depending on agronomic traits, seed yield components, and fatty acid profile for genetic improvement of Carthamus using stepwise multiple regression

“…It has been estimated that high heritability values for plant height and 1000-seed weight suggest these traits are under high genetic control and have been least influenced by environmental effect (Adhikari et al, 2018;Kose et al, 2018;Tahernezhad et al, 2018).…”

“…Genetic improvement would be of interest to safflower-mediated accumulation of desirable parents alleles (Golkar et al, 2012;Kemal and Hailu, 2019). Selection is useful in improving components of yield and in reducing morphological and physiological effects on yield, especially when the traits are highly heritable (Bleidere et al, 2012;Tahernezhad et al, 2018).…”

Estimation of Different Genetic Parameters in Various Safflower (Carthamus tinctorius L.) Genotypes under Field Condition

“…Estimation of heritability is a promising indication about the transmittance of various parameters from parents to progeny. Appraisal of heritability is very helpful in selection of suitable genotypes/ accessions among various environmental and field conditions from a heterogeneous breeding population (Tahernezhad et al, 2018). Based upon percent (%) magnitude, heritability could be classified into low (0-30%), medium (30-60%) and high (>60%) (Reddy et al, 2013).…”