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 Ross, W. M. Articles by Kofoid, K. D. Search for Related Content PubMed Articles by Ross, W. M. Articles by Kofoid, K. D. Agricola Articles by Ross, W. M. Articles by Kofoid, K. D.

Evaluation of Grain Sorghum R Lines with a Single-Cross vs. Inbred Line Testers¹

Forty-two Sorghum bicolor (L.) Moench ‘Martin’-‘Wheatland’ three-way crosses and their related single crosses were grown at Mead, Nebr. in 1975 and 1976 to identify superior fertility restoring (R) lines, evaluate the three female testers, and detect possible epistatic effects. The means of the three sets of hybrids differed significantly for date of bloom, plant height, but not grain yield. The mean performance of three-way crosses was not different from expectations based on the means of single crosses. Two three-way crosses for date of bloom, one for plant height, and one for yield deviated significantly from expectations, which may have been due to chance. The experiment did not indicate that epistasis was important in the lines tested. Selection of the best 21 males based on three-way cross yields included 15 of the best 21 Martin hybrids and 15 of the best 21 Wheatland hybrids. The sterile F₁ tester had greater seed production than the line testers.

Key Words: Sorghum bicolor (L.) Moench • Hybrids • Yield • Epistasis

² Geneticist, SEA, USDA, Lincoln, Nebr., and research assistant, Dep. of Agronomy, Univ. of Nebraska, Lincoln, NE 68583.

Received for publication October 29, 1977.