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International Journal of Plant Breeding and Genetics
  Year: 2014 | Volume: 8 | Issue: 3 | Page No.: 153-163
DOI: 10.3923/ijpbg.2014.153.163
 
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Diallel Cross Analysis for Yield and its Related Traits in Some Genotypes of Flax (Linum usitatissimum L.)
M.A. Abdel-Moneam

Abstract:
Six genotypes of flax representing different agronomic characters were crossed in a half-diallel model in 2009/2010 winter season. The six parents and their 15 F1 crosses were evaluated in 2010/2011 and 2011/2012 seasons to study the combining ability and mode of gene action for yield and its components traits of flax. The results indicated clearly that mean squares of genotypes, general and specific combining ability were highly significant for all studied traits in both seasons and their combined data, except general combining ability for capsules No. plant-1 in both seasons and No. of basal branches plant-1 in the second season were insignificant. The GCA/SCA ratio was more than unity for days to the first flower, plant height and technical length, indicating that these traits are predominantly controlled by additive gene action. Whereas, GCA/SCA ratio was less than unity for No. of basal branches plant-1, No. of capsules plant-1, 1000-seed weight, seed yield plant-1 and straw yield plant-1, indicating that these traits are mainly controlled by non-additive gene action. The best general combiners were P1 (S2) for straw yield, plant height and technical length; P5 (Hermis) for seed and straw yields; P4 (Bleinka) for seed yield plant-1 and 1000-seed weight. Eight crosses and nine crosses showed significant or highly significant and positive SCA effects for seed yield plant-1 and straw yield plant-1, respectively, indicating that these crosses were the best combinations for increasing seed and straw yields.
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How to cite this article:

M.A. Abdel-Moneam , 2014. Diallel Cross Analysis for Yield and its Related Traits in Some Genotypes of Flax (Linum usitatissimum L.). International Journal of Plant Breeding and Genetics, 8: 153-163.

DOI: 10.3923/ijpbg.2014.153.163

URL: https://scialert.net/abstract/?doi=ijpbg.2014.153.163

 
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