Vol.5 : Number 7
Heterosis and inbreeding depression for seed yield, its components and qualitative characters in linseed (Linum usitatissimum L.)

Author(s): Sohan Ram, Ekhlaque Ahmad

The present investigation was carried out with a set of eight varieties of linseed and their twenty eight F1􀂶s obtained through

diallele crossing excluding reciprocals. The eight parents their 28 F1S and the 28 respective F2s were grown in a randomised

block design during Rabi season of 2012 and studied for fifteen quantitative characters. The analysis of variance showed

highly significant differences among the genotypes for all the characters studied except days to maturity in F1s as well as

F2s. Heterosis for seed yield per plant was found to be highest in JLS-9 X KL-221 over better parent as well as over

standard variety. Oil content is an important qualitative character in which the cross LMS-149-4 X RLC-76 recorded

maximum heterosis over better parent (17.16 percent), while that over the standard variety (13.57 percent) was recorded by

the cross Meera X KL-221. Whereas, inbreeding depression in F2s for seed yield per plant was found to be highest in the

cross JLS-9 X RLC-76. Negative estimates of heterotic effects observed in some traits may be attributed to inter-allelic

interactions. No clear-cut relationship between heterosis and inbreeding depression was observed for seed yield, related

traits and qualitative characters. Superior segregants from the cross, JLS-9 X KL-221 may be selected for further

improvement in the seed yield and its contributing traits.

Key Words: Fatty acids profile, Heterosis, Inbreeding depression, Linseed, Seed yield, Oil content

Country: India