HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Caldwell, B. E. Articles by Byth, D. E. Search for Related Content PubMed Articles by Caldwell, B. E. Articles by Byth, D. E. Agricola Articles by Caldwell, B. E. Articles by Byth, D. E.

Selection Value of Phenotypic Attributes in Soybeans¹

The average selection index was used to evaluate the contribution of various phenotypic attributes in selection gain for yield, protein, and oil — individually, and in various combinations.

Selection gain for yield was maximum hen all attributes were used and selection was for yield alone. Deleting any attribute other than yield did not affect selection gain.

Maximum gain for protein and oil (pounds per acre) was obtained from the indices constructed to advance yield; yield and protein; yield and oil; and yield, protein, and oil. Maximum change in percent protein and percent oil was obtained by selecting for these attributes individually, but the total production of oil and protein expressed as pounds per acre was decreased.

² Agronomist, Crops Research Division, ARS, USDA; Agronomist, Crops Research Division and Professor, Iowa State University, Ames, Iowa; and Graduate Assistant, Iowa State University, and Research Scientist, C.S.I.R.O., Cunningham Laboratory, Brisbane, Australia; respectively.

Received for publication November 12, 1965.