Abstract
2x, 3x and 4x forms of spinach were compared in 1959, 1960 and 1961.
At the same stage of development the tetraploids outyielded the diploids in total green matter and leaf blades in 1959 and 1961. In 1960 there was no significant difference. This year the tetraploids had a very small increase in green matter in the period between the two harvest dates. Yield of dry matter was determined in 1960 and 1961, and in both years the tetraploids outyielded the diploids. The rate of development decreased with increasing degree of ploidy. Compared at the same age, when the diploids were about to start bolting they were superior to the polyploids with regard to total yield, yield of leaf blades and yield of dry matter.
The onset of flowering was considerably delayed in the polyploids. Generally the triploids were intermediate between the diploids and the tetraploids. The triploids and tetraploids had a larger proportion of monoecious plants, and a smaller proportion of males than the diploids.
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Bragdø, M. Breeding of polyploid spinach. Euphytica 11, 143–148 (1962). https://doi.org/10.1007/BF00033786
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DOI: https://doi.org/10.1007/BF00033786