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Changes in longevity parameters during seed development in Trifolium ambiguum (expt 2, pollinated 11 January 2006). (A) Estimates of Ki and σ, as indicated, when all the data within each harvest were included in the probit analysis. (B) Estimates of σ for cohorts of the population sorted according to seed coat colour. The common value of σ was 13·6 d (see text).
