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 HighWire Citing Articles via Google Scholar Google Scholar Articles by Chapman, S. R. Articles by Hockett, E. A. Search for Related Content PubMed Articles by Chapman, S. R. Articles by Hockett, E. A. Agricola Articles by Chapman, S. R. Articles by Hockett, E. A.

Gene Effects for Resistance to Kernel Shattering in a Barley Cross¹

Yield losses from shattering have necessitated the development of shatter resistant cultivars, and breeding procedures depend on the type of gene action conditioning the trait under study. Shatter resistance was measured in barley (Hordeum vulgare L.) as the force required to free a spikelet from the rachis. Measurements were made on single random plants of four generations representing six populations (parents, F₁, F₂, and single backcrosses) from a cross between two parental lines. All populations were grown near Bozeman, Mont. in both 1968 and 1969. In both years, dominance for shattering susceptibility as well as additive gene effects separating the parents ,were detected. In 1969, a significant additive x additive epistatic effect was detected, and the dominance effect was more than twice as large as it was in 1968. These results suggest that the inheritance of shattering resistance is complex and the expression of gene effects appears to be sensitive to environmental (year) conditions. However, because shatter resistance is recessive and because only the additive x additive epistatic component was significant, in this cross direct selection for shattering resistance in early generations should be effective. More crosses must be evaluated before a general breeding scheme can be proposed.

Key Words: Epistasis • Gene action • Generation mean analysis • Genetic variation • Hordeum vulgare L.

² Respectively, professor of agronomy and genetics, Plant and Soil Sci. Dep., and agronomist, ARS, USDA, Montana State Univ., Bozeman, MT 59715.

Received for publication September 13, 1975.

This article has been cited by other articles:

				G. Zhang and M. Mergoum Developing Evaluation Methods for Kernel Shattering in Spring Wheat Crop Sci., September 1, 2007; 47(5): 1841 - 1850. [Abstract] [Full Text] [PDF]