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Annals of Botany 82: 843-847, 1998
© 1998 Annals of Botany Company

Variation and Allometry of Seed Weight inAeschynomene americana

JIANHUA ZHANG

Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN, 55108, USA

February 2, 1998 ; July 12, 1998 . August 21, 1998 .

One hundred and fifty seeds from each of 72Aeschynomene americanapopulations with world-wide origin were weighed individually and the mean and distribution of seed weight were calculated and compared between populations. Mean seed weight varied less than five-fold between populations with about 80% having a mean seed weight between 2–3 mg. However, differences between the largest and smallest seeds (2–8 mg) ranged two-17-fold within populations. Populations that had larger mean seed weights also had larger maximum and minimum seed weights but not larger standard deviations than those with smaller mean seed weights. Seed distributions for populations with a mean seed weight<=2 mg were positively skewed while those for all populations with a mean seed weight>=4 mg were negatively skewed. Populations that flowered later produced smaller seeds than those that flowered earlier.Copyright 1998 Annals of Botany Company.

Seed weight, weight distribution, inter-population variation, correlation among traits,Aeschynomene americana.


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