Heading Dates in Six Avena sativa L. × A. sterilis L. Crosses1
- P. M. Lyrene and
- H. L. Shands2
Heading dates were studied in six Avena sativa L. ×A. sterilis L. crosses. The A. sterilis parents (CI 8077 and PI 295932) were later than the five A. sativa parents by 2 to 30 days. F1 plants and many F3 lines were earlier than the A. sativa parents. The earliness of interspecific progenies appeared to result from earliness factors inherited from A. sterilis parents; factors which were not expressed in A. sterilis due to a vernalization requirement. The vernalization requirement was absent in F1 progenies, apparently because of genes from A. sativa.
Successful selection for early maturity in A. sativa × A. sterilis requires elimination of progeny with a vernal. ization requirement. Progeny tests of F3 lines indicated that earliness was easy to stabilize by selection.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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