Genetic variability, heritability and genetic advance of yield components and oil quality parameters in linseed (<em>Linum usitatissimum</em> L.)

Abstract

One hundred linseed (Linum usitatissimum L.) genotypes and four checks were evaluated during rabi, 2017-18 for fifteen traits to examine the nature and magnitude of variability, heritability (h2=broad sense) and genetic advance. Analysis of variance revealed that the differences among genotypes were significant for all the characters studied. Knowledge of selection effect on positive or negative changes of a character under improvement is of paramount importance for the success of any plant breeding programme and helps the selection of desirable breeding methods. Heritability and genetic advance are important selection parameters and selection success is a reflectance of selection response. High PCV and GCV values exhibited for number of branches per plant, number of capsules per plant, yield per plant, palmitic acid and linoleic acid indicating wide range of variability with substantial environmental influence on the expression of these traits and provide better opportunity for improvement of these traits through selection. Small differences between GCV and PCV were recorded for all the characters studied which indicated less influence of environment on these characters. High heritability coupled with high Genetic advance as per cent of Mean (GAM >20%) observed for plant height, technical plant height, number of branches per plant, number of capsules per plant, yield per plant, palmitic acid, stearic acid, oleic acid, linoleic acid and linolenic acid indicated that these characters are highly heritable.

Genetic variability, heritability and genetic advance studies for morphological and quantitative traits in M3 generation of Safflower [Carthamus tinctorius (L.)]

“…This trait also expressed high heritability value of 99.16% and high value (34.52%) of GA as% of mean. These results are in accordance with the reports of Kalaiyarasi et al, (2019) [8] in Sesame, Leelavati and Mogali (2018) [10] in Linseed, Rajanna et al, (2020) [17] in Linseed, Meena et al, (2020) [12] in Linseed, Umamaheswari et al, (2019) [25] in Sesame, and Khattab et al, (2018) [9] in Safflower The PCV for number of seeds per capsule in M 3 progenies was found to be low with the value of 7.24% and it was recorded a low GCV of 6.23%. This trait also expressed high heritability value of 74.02% and moderate value (11.06%) of GA as% of mean.…”

“…This trait also expressed high heritability value of 74.02% and moderate value (11.06%) of GA as% of mean. These results are in accordance with the reports of Rathod et al, (2021) [18] in Safflower, Minnie et al, (2020) [13] in Safflower, Kalaiyarasi et al, (2019) [8] in Sesame, Leelavati and Mogali (2018) [10] in Linseed and Rajanna et al, (2020) [17] in Linseed. The PCV for 100 seed weight in M 3 progenies was found to be low with the value of 9.24% and it was recorded a low GCV of 8.61%.…”

“…High heritability was detected along with high genetic advance as a percent of mean, showing the importance of additive gene action in determining the inheritance of seed yield per plant. These results are in broad agreement with the reports of Rajanna et al, (2020) [17] in Linseed, Leelavati and Mogali (2018) [10] in Linseed, Khattab et al, (2018) [9] , Minnie et al, (2020) [13] in Safflower and Sanghani et al, (2016) [19] in Sesame.…”

“…A close observation of PCV and GCV revealed that the values recorded for GCV were very close to PCV indicating thereby that maximum variation were caused by mutations for polygenes. These results are in broad agreement with the reports of Sikarwar et al, (2017) [22] in Yellow Sarson, Rajanna et al, (2020) [17] in Linseed, Dogra et al, (2020) [5] in Linseed, Khattab et al, (2018) [9] and Minnie et al, (2020) [13] in Safflower. Days to maturity in the M 3 progenies registered a low PCV of 1.58% and a low GCV of 1.49%.…”