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Analysis of genetic basis of variations and combing ability for yield-related traits in Brassica lines by using line × tester analysis

By: Shumaila Kousar, Muhammad Sohaib, Rao Touqeer Ahmed, Ch. Muhammad Safeer, Ahmad Raza, Ayaz Khan, Maimoona Qamar

Key Words: Brassica, Gene action, General combining ability, Specific combining ability, Line × tester

Int. J. Agron. Agri. Res. 15(2), 8-14, August 2019.

Certification: ijaar 2019 0200 [Generate Certificate]

Abstract

Brassica is an important oilseed crop. The genetic basis of plant height, no. of primary branches, no. of pods per plant, no. of pods per raceme, pod length, beak length and 1000 grain weight in brassica lines was estimated through combining ability by using line × tester (5 × 3) analysis. The presence of a significant difference in the means squares of analysis of variance indicated that all the genotypes genetically differed from each other for investigated traits. The super value of Ϭ²sca over Ϭ²gca revealed the presence of non-additive gene action for all studied parameters. The results for the gca effect concluded that BN3, BN4, and BC27 had higher gca effect for many traits. Lines exhibited greater contribution then testers for every trait except beak length. The F1 hybrid of BN3 × BC27 was superiors in sca effect for many of the investigated traits. The other best performing hybrids were BN3 × BC7, BN4 × BC27, BCAC × BC7, BCAC × BC27, BCAA × BC7, BCAA× BC27, and BC44 × BC7. This research described the importance of the non-additive type of gene action in brassica and suggested its use in the breeding programs for evaluating genetic variations. The study presented useful information about gene action for various yield controlling traits. Thus, concluded that the use of lines having superior gca and sca in the yield improvement plans for brassica will help in obtaining improved cultivars.

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Analysis of genetic basis of variations and combing ability for yield-related traits in Brassica lines by using line × tester analysis

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Shumaila Kousar, Muhammad Sohaib, Rao Touqeer Ahmed, Ch. Muhammad Safeer, Ahmad Raza, Ayaz Khan, Maimoona Qamar.
Analysis of genetic basis of variations and combing ability for yield-related traits in Brassica lines by using line × tester analysis.
Int. J. Agron. Agri. Res. 15(2), 8-14, August 2019.
https://innspub.net/ijaar/analysis-genetic-basis-variations-combing-ability-yield-related-traits-brassica-lines-using-line-x-tester-analysis/
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