Effect of juvenile stage and length of chilling on vernalization of two genotypes of caraway—Carum carvi L.
Titel:
Effect of juvenile stage and length of chilling on vernalization of two genotypes of caraway—Carum carvi L.
Auteur:
Bjerke, K. L. Balvoll, G.
Verschenen in:
Acta agriculturae Scandinavica. Section B, Soil and plant science
Paginering:
Jaargang 47 (1997) nr. 2 pagina's 112-117
Jaar:
1997-06
Inhoud:
In three trials in the south-east of Norway, plants of caraway of different ages were exposed to chilling at 10°C for 4 or 2 weeks or at 5°C for 8 or 11 weeks. In the Danish cultivar 'Sylvia' 40% of the plants developed elongated seed-stalks after being raised for 6 weeks in a greenhouse, chilled (5°C) for 8 weeks, and thereafter grown in a greenhouse for 3 weeks and 5 days in the field. Plants with 5-6 leaves were the most sensitive to chilling, but plants with only two leaves also responded to the cold stimuli and they developed elongated seed-stalks. Seeds from annual plants of a wild caraway gave plants that were more easily vernalized at 10°C than 'Sylvia', while the results were the opposite at 5°C. In two years about 50% of non-chilled plants of 'Sylvia', raised for 8 weeks in a greenhouse and transplanted to the field in late May, produced elongated seed-stalks in the same season. It is concluded that the tested caraway genotypes are not typical biennial plants which demand a long winter period to be vernalized. The results show a great diversity in demand for chilling in 'Sylvia' and in a Norwegian selection of wild caraway.
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