Population differentiation in floral and life history traits ofOxalis corniculata L. (Oxalidaceae) with style length polymorphism |
| |
Authors: | Hiroyuki Shibaike Yoshio Ishiguri Shoichi Kawano |
| |
Institution: | (1) Department of Botany, Faculty of Science, Kyoto University, 606-01 Kyoto, Japan;(2) Institute of Genetic Ecology, Tohoku University, 980 Sendai, Japan |
| |
Abstract: | A quantitative genetic analysis was conducted on the amounts and distribution of variation of 20 floral, reproductive and
life history traits of a self-compatible perennial,Oxalis cornlculata L. (Oxalidaceae). This species comprises two floral morphs, homostyled and long-styled, with different breeding systems.
The hierarchical design of the experiments on three homostyled and three long-styled populations allowed partitioning of variation
into four levels of organization using nested ANOVAs. Seven of the 20 traits examined were differentiated between homostyled
and long-styled populations. Significant genetic variance components were detected in the major traits (114 of the 120 traits)
examined for six populations. Average values of variance components among families within a population across 20 traits for
homostyled populations were higher than those of long-styled populations. These responses likely reflect the consequences
of different levels of selfing and/or mixed mating on genetic variation in the two floral morphs ofO. corniculata. Pearson product-moment correlations for family means of seven traits selected were also calculated. Two groups of trait
combinations (i.e., between floral traits, and between reproductive and life history traits) showed significant family mean
correlation coefficients. The origins of these varlation patterns found in different populations ofO. corniculata are discussed in terms of the underlying selective regimes operating in each population. |
| |
Keywords: | Breeding system Family mean correlation Heterostyly Homostyly Variance component |
本文献已被 SpringerLink 等数据库收录! |
|