Effect of selection during the period of pollen germination and pollen tube growth in F1 hybrids on cold resistance in spring rape progeny.

摘要

The possibility of increasing cold tolerance in the offspring of F1 hybrids of spring rape (Brassica napus) through selection of cold-tolerant microgametophytes was studied. Microgametyophytes subjected to the effect of low temperature (9鳦) for 2 days in the period of pollen germination and pollen tube growth produced second- and third-generation offspring with improved cold tolerance. The method developed can be successfuly used in spring rape breeding programmes.