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Nondestructive Estimates of Leaf Area in White Clover Using Predictive Formulae

The Contribution of Genotype Identity to Trifoliate Leaf Area

Dep. of Biology, P.O. Box 373, Univ. of York, Heslington, York, YO10 5YW, UK

View larger version (26K): [in a new window]   Fig. 1. The linear relationship between area (cm2) and midrib length (cm) of the central leaflet of trifoliate leaves of white clover (Trifolium repens cv. Milkanova) after double ln transformation. Data for individual leaves of genet G (n = 410, closed circles, full line) and J (n = 728, open circles, broken line) are shown. The slopes of linear regressions on these data (bG = 2.191, bJ = 1.884) differed according to a Tukey-Kramer pairwise comparison test at = 0.1 (q4989, 9 = 4.148; 95% confidence interval for bJ–bG: 0.213 ± 0.226).

View larger version (14K): [in a new window]   Fig. 2. Coefficients t of linear regression slopes of the form ln(trifoliate leaf area) = s + t x ln(midrib length), corresponding to exponents b in the predictive formulae (trifoliate leaf area) = a(midrib length)b with associated 95% confidence limits for nine genets of white clover (Trifolium repens cv. Milkanova).