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Published in Crop Sci 7:19-21 (1967)
© 1967 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Inheritance of in vitro Digestibility and Associated Characteristics in Medicago sativa L.1

Hernan Chaverra Gil, R. L. Davis and R. F. Barnes2

The progenies of 10 Medicago sativa L. clones were analyzed to determine the type of gene action conditioning in vitro dry matter digestibility (IVDMD) and related chemical components and the relationship to total digestible units (TDU) per unit area. The mean squares for both general and specific combining ability were significant for IVDMD. Usually, if the general combining ability effects for IVDMD of the clone were positive, the effects for yield were negative. The 10 crosses highest in sea effects for IVDMD had negative (low) specific combining ability effects for yield with one exception. Three of the 10 crosses with the highest specific combining ability effects for yield had positive sea effects for IVDMD. The other seven were negative.

1 Joint contribution of the Purdue Agricultural Experiment Station and the Agricultural Research Service, U.S. Department of Agriculture. Published as Journal Paper No. 2798 of the Purdue Agricultural Experiment Station. Part of a thesis submitted by the senior author in partial fulfillment of the requirements for a Ph.D. degree. Supported in part by a grant from Farmers Forage Research Cooperative.

2 Formerly graduate student and Rockefeller Foundation Fellow, now in charge Forage Research, Colombian Agricultural Institute, Bogota, Colombia; Professor of Agronomy; and Research Agronomist, USDA, and Associate Professor of Agronomy.

Received for publication April 28, 1966.




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