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Leaf permeability and its relationship to grain yield and dry matter production in oats avena sativa l



Leaf permeability and its relationship to grain yield and dry matter production in oats avena sativa l



Journal of Agronomy & Crop Science 158(4): 259-270



The leaf permeability of eighteen field grown oat cultivars was examined with the aid of a viscous-flow porometer. The relationship of leaf permeability to grain yield was determined during two different years. An F4 population and its parents were further studied for frequency distribution of leaf permeability, total plant dry matter, and grain yield. A plus and minus selection based on leaf permeability measurements was also studied. Leaf permeability proved to be cultivar specific, i.e. a cultivar with low values one year also exhibited low values next year and vice versa (rank correlation r = 0.55, p < 0.05). This in spite of that one year was dry and the other wet. Old cultivars had low leaf permeability while new cultivars and new promising breeding lines had, with one exception, high values. Leaf permeability was positively correlated with grain yield, particularly during the wet year (r = 0.70, p < 0.001). The population had a population mean of 1.09 porometer units compared to 0.95 and 1.18 porometer units for the parents (LSD = 0.08, p < 0.05). Both total dry matter and grain production were positively correlated (p < 0.001) with leaf permeability during grain-filling. The plus and minus selection for leaf permeability within a population showed in the next generation significantly different population means (0.69 and 0.79 porometer units, LSD = 0.08, p < 0.05). Total dry weight and grain yield were six per cent higher (non significant) in the plus selection than in the minus selection. The possibility to use leaf permeability as a selection criterion is discussed.

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Accession: 005799313

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DOI: 10.1111/j.1439-037x.1987.tb00272.x



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