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 Takeda, K Articles by Frey, K. J. Search for Related Content PubMed Articles by Takeda, K Articles by Frey, K. J. Agricola Articles by Takeda, K Articles by Frey, K. J.

Protein Yield and Its Relationship to Other Traits in Backcross Populations from an Arenas ativa x A. sterilis Cross¹

Relationships of various traits to protein yield of oats were studied by using F₂-derived lines in the F₃ populations from Be₀ through Bc₅ of an interspecific oat cross Avena sativa x A. sterilis.

Mean heritabilities ranged from 64 to 68% for heading date and plant height, 45 to 51% for bundle weight, straw yield, grain yield, growth rate, grain number, and protein yield, and 36 to 42% for harvest index, unit straw weight, groat weight, protein percentage, and protein per groat.

Protein percentage had high negative genotypic correlations with grain yield and harvest index and positive genotypic correlations with plant height and protein per groat. Protein yield had genotypic correlations above 0.80 with bundle weight, straw yield, grain yield, growth rate, unit straw weight, and grain number, but it had no correlation with heading date, groat weight, protein percentage, and protein per groat. Thus, grain yield was the primary determinant of variation in protein yield, and protein percentage was negatively associated with grain yield and had little effect on protein yield.

Simulated selection experiments based on the line mean (selection intensity = 5%) showed that selection for protein yield via itself or via grain yield both caused ca. 26% improvement; whereas selection for protein yield via protein percentage caused no improvement.

Protein yield was significantly (P = 0.01)) above the recurrent parent in four oat lines. In three of these increased protein yield was primarily due to increased grain yield. The increased protein yield of the fourth line, however, was due 45% to increased grain yield, 46% to increased protein percentage and 9% to the interaction of these two traits.

Key Words: Oats • Protein percentage • Interspecific cross • Heritability

² Assistant professor in plant breeding, Hirosaki Univ., Hirosaki, Japan (currently, Distinguished Foreign Scholar, World Food Inst., Iowa State Univ.); C. F. Curtiss Distinguished Professor in Agriculture, Iowa State Univ., Ame

Received for publication October 18, 1978.