Patterns of variation in flowering and seed set of meadowfoam |
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| Authors: | Canhong Cheng Ian L Gordon |
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| Institution: | (1) HortReserach, Te Puke Research Centre, 412 No. 1 Road RD2, Te Puke, New Zealand;(2) Institute of Molecular Biosciences, Massey University & Donach Plant Breeding Academy, Palmerston North, New Zealand |
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| Abstract: | Patterns of flowering and seed set were explored by principal component (PC) analysis of counts of fresh flowers, total flowers
and seeds at four observation times. This pattern analysis was attempted because of the complicated rhythms of flowering and
seed set over an extended period. The approach was considered superior to regressions (over time) for this data because of
these pattern complexities, and because these were few time-nodes. Also it avoided the need to find optimum regression functions.
Parsimony was achieved with a two-component ordination based on truncation at 70% of the total variance. The results for all
characters showed that the first component concentrated on the middle period of flowering/seed set, and de-emphasized the
early phase. The second component emphasized the extremities of the flowering/seed set span. The first component accounted
for a large proportion of total variance (45.5% to 69.2%), which indicated its importance. The general meaning of the first
component was ‘median flowering’, ‘general flower production’ and ‘median-to-late seed set’ for these characters fresh flowers,
total flowers and seed set, respectively. The results showed that PC analysis successfully summarized the complex patterns
of flowering/seed set and revealed the pattern differences between plants. It was apparent that no particular pattern of general
flowering and seed set could be regarded as ‘typical’ in meadowfoam. It was confirmed that the population was diverse, this
being typical of segregating plants within a randomly fertilized population.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | flowering meadowfoam principal component analysis seed set |
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