Relations between biomass maintenance of potato clones and the growth and yield of their progeny seedlings at low temperatures

Abstract

The main purpose of the research reported in this article was to see if the biomass maintenance of parental potato clones was correlated with the growth and yield of their progeny. Seedling populations with parents of European and of Andean origin were cultivated at a temperature of 10 ° C during the day and 4 ° C at night. The biomass maintenance of the parents was defined as the ratio between the total biomass yield at 20°C day/10 ° C night and the total biomass yield at 10 ° C day/4° C night. The Andean parents had good maintenance ability at the lower regime compared to the Eurpean parents.Biomass maintenance appears to be hereditary. Significant correlation was found between the dry matter maintenance of the parents and the growth rate of seedlings, especially during the second month after potting. In populations with only Andean or only European parents, differences in height increase and leaf formation rate between seedling populations were correlated to the dry matter maintenance of the parents cultivated at the temperature regime 10/4 ° C. In the hybrid population between an Andean and an European parent only differences in height increase during the second month after potting correlated well to the average dry matter maintenance of the parents. It appears therefore that the rate of height increase during the second month after potting can be used as a criterion for selection.

Temperature‐Related Changes in Chlorophyll Fluorescence and Contents of Chlorophyll and Carotenoids in Andean and European Potato Clones

“…All the European clones had a Solanum tuberosum background, whereas the Andean clones were frost-resistant hybrids between various tuber-bearing Solanum species (cf. KRISTJANSDOTTIR 1989). The DMRs of ' Stina', 'Matilda', S3, 2015, 201,2 and No.…”

“…Furthermore, when individual clones were studied, differences in LTBP and DMR were found when comparing frost-resistant Andean potato genotypes (clones) and frostsensitive European clones (KRISTJANSDOTTIR 1991b).…”

“…In earlier investigations, it was found that frost-resistant Andean potato seed plant populations had a better low-temperature biomass performance (LTBP) than frost-sensitive European seed plant populations (KRISTJANSDOTTiR 1989(KRISTJANSDOTTiR , 1991a.…”

“…In various plant species, such as potatoes (SIM- MONDS 1971, LEVY 1991, tomatoes (MILTAU et al 1986), and Larix (MARTINSON 1990), ecotypes have been found showing superior growth under extreme temperature conditions. In earlier investigations, it was found that frost-resistant Andean potato seed plant populations had a better low-temperature biomass performance (LTBP) than frost-sensitive European seed plant populations (KRISTJANS-DOTTiR 1989, 1991a.…”

“…The Andean seed plant populations had a higher temperature-related dry mass production ratio (DMR) (dry matter production at 10 °C day/4 °C night divided by dry matter production at 20 °C day/10 °C night) than the frost-sensitive European seed plant populations. Furthermore, when individual clones were studied, differences in LTBP and DMR were found when comparing frost-resistant Andean potato genotypes (clones) and frostsensitive European clones (KRISTJANSDOTTIR 1991b).…”