Genetic Studies for Yield and Ala Profiles in Mutant Population of Linseed (Linum usitatissimum L.)
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Date
2016-08
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University of Agricultural Science, Dharwad
Abstract
In the present investigation, two linseed cultivars viz., Indira Alsi and NL-115 were used for creating mutation by treating with five different doses of EMS (0.1 to 0.5 %) and was conducted during rabi 2015-16 at MARS, Dharwad. In linseed, ODR (Oleic Desaturation Ratio) and LDR (Linoleic Desaturation Ratio) values gives an idea about activities of 12 and 15 desaturases involved in desaturation of oleic and linoleic acids, respectively. Fatty acid analysis of the selected mutants revealed, mutant no. 90-2 exhibited highest linolenic acid (55.18 %) and increased yield per plant (6.06 g). This can be used as a source of high linolenic acid for pharmaceutical and health benefits. Low linolenic acid mutants 45-3 (14.12 %) 64-2 (21.70 %) and 41-2 (22.80 %) with low LDR value are considered for further improvement of genotypes suited for cooking oil.
Higher GCV and PCV coupled with higher heritability and genetic advance were obtained for seed yield per plant, number of capsules per plant, number of secondary branches per plant. Hence, these characters are amenable for selection process. Correlation and path coefficient analysis inferred that, number of capsules per plant had higher significant association and positive direct effects on seed yield. Hence, importance may be given for this trait to improve yield potential. In addition to these traits, other desirable mutants showing early maturity (mutant numbers 66, 85 with duration 91- 96 days) and erect growth habit, tolerant to lodging (mutant number 78) can be utilized as genetic stocks in breeding programme.
Evaluation of 13 high yielding mutants in RCBD revealed, mutant no.106-3 recorded highest yield of 1,176 kg ha-1 followed by 106-2 (1,168 kg ha-1) and 102-6 (1,084 kg ha-1) which was relatively early in maturity (102 days) when compared to the checks (580 kg ha-1, 628 ha-1 , maturity 110 days).