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Resource Allocation in a Breeding Program for Phosphorus Concentration in Maize Grain

2004; Wiley; Volume: 44; Issue: 3 Linguagem: Inglês

10.2135/cropsci2004.0753

1435-0653

Brandon M. Wardyn, W. K. Russell,

Soil and Water Nutrient Dynamics

Crop ScienceVolume 44, Issue 3 p. 753-757 Crop Breeding, Genetics & Cytology Resource Allocation in a Breeding Program for Phosphorus Concentration in Maize Grain Brandon M. Wardyn, Corresponding Author Brandon M. Wardyn [email protected] Dep. of Agronomy, Iowa State Univ., Ames, IA, 50011Corresponding author ([email protected]).Search for more papers by this authorW. Ken Russell, W. Ken Russell Dep. of Agronomy and Horticulture, Univ. of Nebraska-Lincoln, 279 Plant Science Bldg., Lincoln, NE, 68583-0915Search for more papers by this author Brandon M. Wardyn, Corresponding Author Brandon M. Wardyn [email protected] Dep. of Agronomy, Iowa State Univ., Ames, IA, 50011Corresponding author ([email protected]).Search for more papers by this authorW. Ken Russell, W. Ken Russell Dep. of Agronomy and Horticulture, Univ. of Nebraska-Lincoln, 279 Plant Science Bldg., Lincoln, NE, 68583-0915Search for more papers by this author First published: 01 May 2004 https://doi.org/10.2135/cropsci2004.7530Citations: 10 Journal Series No. 4002 of the Univ. of Nebraska, Agricultural Research Division. This study was funded by a grant from the Nebraska Corn Board. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract When beef cattle (Bos taurus) are fed grain of maize (Zea mays L.) in which the concentration of phosphorus (P) exceeds the animal's need for this element, the excess P is excreted in the feces. Spreading this manure on cropland increases the potential for P pollution of surface waters by run-off. Experiments were undertaken to determine the relative magnitudes of genotypic and nongenotypic variances of P concentration in maize grain (P-Gr) to assess the ability to select maize genotypes in which this trait more closely matches the dietary need of beef cattle. Genetic variability was found in a population developed from a cross of Illinois High Protein (IHP) × Illinois Low Protein (ILP). Because of few low P-Gr segregates, the IHP × ILP population was not considered a good breeding source for this trait. Nongenetic sources of variance were significant but small compared with genotypic variances. Broad-sense heritability (H) for P-Gr among S1 family means in the IHP × ILP population was estimated at 0.82. This high value suggested that this trait would respond to selection. A comparison of mean values of S1 families selected on the basis of performance in 2000 or in 2001 alone to those selected on the basis of 2-yr data suggested that the loss in efficiency resulting from selecting on 1-yr data would be only approximately 5%. References 1Call, J.W., Phosphorus influence on growth and reproduction of beef cattle. J. Anim. Sci. (1978) 47, 216–225 http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=agrocropsoil&KeyUT=A1978FQ43300032&DestLinkType=FullRecord&DestApp=WOS_CPL&UsrCustomerID=523bbf5d2a868de7bbaeea0bc70ec0e4 2 Council for Agricultural Science and Technology. 2002. Animal diet modification to decrease the potential for nitrogen and phosphorus pollution. 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