Summary
Genetic control of low-P tolerance in tomato was investigated with shoot dry weight (SDW) data from parental, F1 backcross, and F2 generations of a cross between two differentially tolerant strains in sand-alumina cultures. F1 SDWs exceeded parental SDWs by 89% in low P cultures, but were 20% less than parental SDWs in high P cultures. Two exceptional progenies from the backcross to the tolerant parent produced more SDW with low P than any of the parental or F1 plants growing with high P. These progenies exhibited high total P acquisition, high uptake of P per m of root, and efficient internal utilization of P. Nonadditive genetic variance was more important than additive genetic variance in the expression of low-P tolerance. However, the range of phenotypic variation in the backcross generations suggests recombination and complimentation among a relatively small number of genes. Prospects for breeding genotypes more tolerant to low P appear favorable, although such genotypes may be at a selective disadvantage in P-rich environments.
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© 1987 Martinus Nijhoff Publishers, Dordrecht/Boston/Lancaster
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Coltman, R.R., Gabelman, W.H., Gerloff, G.C., Barta, S. (1987). Genetics and physiology of low-phosphorus tolerance in a family derived from two differentially adapted strains of tomato (Lycopersicon esculentum Mill.). In: Gabelman, W.H., Loughman, B.C. (eds) Genetic Aspects of Plant Mineral Nutrition. Developments in Plant and Soil Sciences, vol 27. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3581-5_28
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DOI: https://doi.org/10.1007/978-94-009-3581-5_28
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