Association Between Percent Total Alkaloids and Other Traits in Flue-cured Tobacco
1976
Chaplin, James F. | Weeks, W. W.
The relationships between percent total alkaloids and nine agronomic and chemical traits were studied in isogenic lines derived from 10 cultivars of flue-cured tobacco (Nicotiana tabacum L.). Isogenic lines with low total alkaloids percentage (approximately 0.20%) were compared with their “normal” recurring parents (total alkaloids 1.85 to 2.70%). The differences in traits other than alkaloid levels between the low alkaloid lines and their recurrent parent should reflect physiological associations (pleiotropism) and/or genetic linkages. Yield, grade index, total N, and reducing sugar content in the low alkaloid lines were lower than in the normal flue- cured cultivars. Chlorophyll contents, at time of harvest, were higher in the low alkaloid lines than in their recurrent parent. Alkaloid levels had little or no association with plant height, leaves per plant, or days to flower.
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