Breeding Methodology in Wheat. II. Productivity, Harvest Index, and Height Measured on F2 Spaced Plants for Yield Selection in Spring Wheat1
- P. B. E. McVetty and
- L. E. Evans2
Three crosses of spring wheat (Triticum aestivum L.) involving the cultivar ‘Glenlea’ as a common female parent were used to evaluate the use of productivity, harvest index, and height in a combined index selection procedure on F2 spaced-plants as selection criteria to identify high-yielding F4 bulks. A space-planted and solid-seeded trial of seven tall cultivars and seven semi-dwarf cultivars (both groups including the parents involved in the crosses investigated), indicated that potentially high-yielding tall cultivars could be selected from space-planted populations using productivity. Semi-dwarf cultivars (short cultivars), in contrast, could be selected from space-planted populations using harvest index. Therefore, productivity was used as the selection criterion on tall F2 plants and harvest index was used as the selection criterion on short F2 plants for high yield potential. The results indicated that a combined index selection procedure utilizing productivity, harvest index, and height may be useful in increasing yield in spring wheat.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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