During the frost testing of Chinese Spring ditelosomics, genes respons
ible for frost resistance were found on the short and long arms of chr
omosome 7A and on the long arms of chromosomes 5A, 3B, 5B, 7B and 5D.
Since monosomic and substitution analysis indicated that genes respons
ible for frost resistance were carried by chromosomes 5A, 5B and 5D, i
t can be taken as proved that these genes are located on the long arms
of the chromosomes.