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2013•Banat s Journal of BiotechnologyOpen access

EXPRESSION OF HETEROSIS AND DEGREE OF DOMINANCE IN F1 OF SOME QUANTITATIVE TRAITS IN TWO MAIZE HYBRIDS, DEPENDING ON THE METEOROLOGICAL CONDITIONS

Lyubomir Ivanov

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Abstract

During the period 2008–2010 under conditions without irrigation at the Experimental field of IASS “Obraztsov Chiflik”–Rousse, hybrids Ruse 464, Ruse 555 and their parental lines were studied in density of growing 5500 plants/da. Average values, expressions of heterosis and degree of dominance in F1 of traits: length of maize ear, mass of 1000 grains, leaf area per a plant, height of formation of the top maize ear and length of panicle were determined and analyzed. Degrees of dominance in F1 indicated that heterosis in all traits were due to positive over dominance, as it was stronger expressed in both hybrids regarding traits length of maize ear and leaf area per a plant. Expressions of heterosis in hybrids studied showed different genetic basis of parental lines in both hybrids and the possibility they to be used in various trends of breeding, depending on the trait we want to improve.

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What this paper is about

During the period 2008–2010 under conditions without irrigation at the Experimental field of IASS “Obraztsov Chiflik”–Rousse, hybrids Ruse 464, Ruse 555 and their parental lines were studied in density of growing 5500 plants/da. Average values, expressions of heterosis and degree of dominance in F1 of traits: length of maize ear, mass of 1000 grains, leaf area per a plant, height of formation of the top maize ear and length of panicle were determined and analyzed. Degrees of dominance in F1 indicated that heterosis in all traits were due to positive over dominance, as it was stronger expressed in both hybrids regarding traits length of maize ear and leaf area per a plant. Expressions of heterosis in hybrids studied showed different genetic basis of parental lines in both hybrids and the possibility they to be used in various trends of breeding, depending on the trait we want to improve.

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Available abstract

During the period 2008–2010 under conditions without irrigation at the Experimental field of IASS “Obraztsov Chiflik”–Rousse, hybrids Ruse 464, Ruse 555 and their parental lines were studied in density of growing 5500 plants/da. Average values, expressions of heterosis and degree of dominance in F1 of traits: length of maize ear, mass of 1000 grains, leaf area per a plant, height of formation of the top maize ear and length of panicle were determined and analyzed. Degrees of dominance in F1 indicated that heterosis in all traits were due to positive over dominance, as it was stronger expressed in both hybrids regarding traits length of maize ear and leaf area per a plant. Expressions of heterosis in hybrids studied showed different genetic basis of parental lines in both hybrids and the possibility they to be used in various trends of breeding, depending on the trait we want to improve.

Key concepts: Heterosis, Hybrid, Dominance (genetics), Degree (music), Biology, Expression (computer science), Mathematics, Agronomy

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EXPRESSION OF HETEROSIS AND DEGREE OF DOMINANCE IN F1 OF SOME QUANTITATIVE TRAITS IN TWO MAIZE HYBRIDS, DEPENDING ON THE METEOROLOGICAL CONDITIONS — Research Paper | ScholarLens