Abstract
SummaryAs an indication of heritable variation between genotypes, the response of diploid and autotetraploid homozygous inbred lines of rye to varying applications of inorganic nutrients and to temperature ‘shocks’ during growth was studied. The results indicated first that developmental differences occur between lines and between diploids and tetraploids under comparable conditions of growth. Secondly, the consequences of altering growing conditions can differ between lines and between diploids and tetraploids. Thirdly, the effect of polyploidy upon the response to these treatments was shown to vary between lines. It is concluded that an assessment of plant growth and development must take into consideration the genie, chromosomal and environmental interactions.
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