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Inheritance of tolerance to soil acidity in tropical maize (Zea mays L.)

By: Duque Vargas, J.
Contributor(s): Ceballos, H [coaut.] | Granados, G [coaut.] | Pandey, S [coaut.].
Material type: materialTypeLabelArticlePublisher: 1994ISSN: 1435-0653 (Revista en electrónico).Subject(s): Acid soils | Inheritance (genetics) | Resistance to injurious factors | Zea mays AGROVOC In: Crop Science v. 34, no. 1, p. 50-54999820Summary: A North Carolina Design I mating system was used to study the inheritance of tolerance of soil acidity in a tropical maize population, SA-3. Some 256 full-sib progenies, involving 64 males and 4 females within each male, were grouped into eight sets and field-planted using two replications under one normal and three acidic soil environments in Colombia during 1990-1991. Across acidic soils, additive genetic variance (VA) was similar to dominance variance (VD) for grain yield (0.15 vs. 0.13), greater than VD for plant height (47.97 vs. 6.83) and ears per plant (0.01 vs. 0.00) and less than VD for days to silking (1.26 vs. 2.98). Heritability, estimated using half-sib family means, averaged 36.3 plus or minus 19.9% for yield, 30.9 plus or minus 19.8% for days to silking, 51.5 plus or minus 19.3% for plant height and 40.5 plus or minus 19.8% for ears per plant. Additive x environment interaction was the more important component of genetic variance for all the traits studied. Although grain yield showed a positive additive genetic correlation (rA = 0.84) with ears per plant, direct selection for yield was more effective for improving yield under acidic soils. The magnitudes of additive and additive x environmental variances and of rA among the environments suggested that recurrent selection, based on multilocation testing, would be effective in improving grain yield, days to silk, plant height and ears per plant under acidic soils
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Article CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

REFERENCE ONLY (Browse shelf) 1 Available 999820
Total holds: 0

Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0011-183X

A North Carolina Design I mating system was used to study the inheritance of tolerance of soil acidity in a tropical maize population, SA-3. Some 256 full-sib progenies, involving 64 males and 4 females within each male, were grouped into eight sets and field-planted using two replications under one normal and three acidic soil environments in Colombia during 1990-1991. Across acidic soils, additive genetic variance (VA) was similar to dominance variance (VD) for grain yield (0.15 vs. 0.13), greater than VD for plant height (47.97 vs. 6.83) and ears per plant (0.01 vs. 0.00) and less than VD for days to silking (1.26 vs. 2.98). Heritability, estimated using half-sib family means, averaged 36.3 plus or minus 19.9% for yield, 30.9 plus or minus 19.8% for days to silking, 51.5 plus or minus 19.3% for plant height and 40.5 plus or minus 19.8% for ears per plant. Additive x environment interaction was the more important component of genetic variance for all the traits studied. Although grain yield showed a positive additive genetic correlation (rA = 0.84) with ears per plant, direct selection for yield was more effective for improving yield under acidic soils. The magnitudes of additive and additive x environmental variances and of rA among the environments suggested that recurrent selection, based on multilocation testing, would be effective in improving grain yield, days to silk, plant height and ears per plant under acidic soils

English

Crop Science Society of America (CSSA)

CO-UNCP 1992 DUQUE M rf

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