Although dual models for triggering lateral and apical branch points can both effectively produce symmetrical arrays, it is unclear, however, why such distinctive mechanisms for branch induction would produce such similarly shaped distributions of branch interval lengths.
Watters: Department of Biology, Neils Science Center, Valparaiso University, 1610 Campus Drive East, Valparaiso, Indiana 46383 Table 1.--Correlation between branch interval lengths.
This was determined by the demonstration of a statistical correlation between lengths of branch intervals (the distance between two tandem branch points) having a common origin.
2000a, b; Watters & Griffiths 2001) has suggested that apical and lateral branching share much of their control, with apical and lateral branch arrays both showing symmetry (branch intervals having a common origin show correlation for their lengths) and similar distributions (in terms of the shape of the curve, but not the means) of spacing between branch points.
The two models differ in one unique prediction, namely their expectation for the lengths of branch intervals following the initial intervals observed previously (i.e., B vs.
Here, we examine the correlation between branch intervals that do not share a common origin, but those where the intervals immediately prior to those under consideration share a common origin.
Branch intervals (distances between branch points) were determined by measuring rear projected negatives.
Statistical analysis.--The distribution of branch intervals in most strains is markedly skewed toward the short end of the range.