Inheritance and Natural Selection on Functional Traits

Geber, Monica A.; Griffen, Lauren R.

doi:10.1086/368233

Cited by 402 publications

(447 citation statements)

References 150 publications

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“…Over both base populations, realized heritability for flowering time (median h 2 = 0.42) was greater than that for germination time (median h 2 = 0.27). Early life cycle traits typically have smaller heritability than those expressed at later stages (reviewed in Geber & Griffen, 2003 [ h 2 = 0.38 flowering time, h 2 = 0.11 germination time]; Simons & Johnston, 2006). Substantial maternal contributions early in the life cycle likely underlie this pattern (Galloway et al., 2009; Wilson & Réale, 2006).…”

Section: Discussionmentioning

confidence: 99%

Response to joint selection on germination and flowering phenology depends on the direction of selection

Galloway

Watson

Prendeville

2018

Ecology and Evolution

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Flowering and germination time are components of phenology, a complex phenotype that incorporates a number of traits. In natural populations, selection is likely to occur on multiple components of phenology at once. However, we have little knowledge of how joint selection on several phenological traits influences evolutionary response. We conducted one generation of artificial selection for all combinations of early and late germination and flowering on replicated lines within two independent base populations in the herb Campanula americana. We then measured response to selection and realized heritability for each trait. Response to selection and heritability were greater for flowering time than germination time, indicating greater evolutionary potential of this trait. Selection for earlier phenology, both flowering and germination, did not depend on the direction of selection on the other trait, whereas response to selection to delay germination and flowering was greater when selection on the other trait was in the opposite direction (e.g., early germination and late flowering), indicating a negative genetic correlation between the traits. Therefore, the extent to which correlations shaped response to selection depended on the direction of selection. Furthermore, the genetic correlation between timing of germination and flowering varies across the trait distributions. The negative correlation between germination and flowering time found when selecting for delayed phenology follows theoretical predictions of constraint for traits that jointly determine life history schedule. In contrast, the lack of constraint found when selecting for an accelerated phenology suggests a reduction of the covariance due to strong selection favoring earlier flowering and a shorter life cycle. This genetic architecture, in turn, will facilitate further evolution of the early phenology often favored in warm climates.

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Section: Discussionmentioning

confidence: 99%

Response to joint selection on germination and flowering phenology depends on the direction of selection

Galloway

Watson

Prendeville

2018

Ecology and Evolution

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“…The induced responses enable plants to reduce the negative fitness consequences caused by competition for light (Aphalo & Ballare, 1995;de Kroon & Hutchings, 1995;Sultan, 1995;Huber & Hutchings, 1997;van Hinsberg, 1997;Geber & Griffen, 2003). However, plastic responses may also be costly (van Tienderen, 1991;DeWitt et al ., 1998;Scheiner & Berrigan, 1998;Scheiner, 2002).…”

Section: Introductionmentioning

confidence: 99%

Shade avoidance inTrifolium repens: costs and benefits of plasticity in petiole length and leaf size

et al. 2006

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Research Summary• We tested whether the degree of shade-induced plasticity in petiole length and leaf area is related to the mean trait value expressed under high-light conditions, and to what extent trait values expressed under high-light and shaded conditions affect plant performance.• Thirty-four Trifolium repens genotypes were used with a wide range of petiole lengths and leaf areas. Plants were subjected to a high-light environment and two shading regimes: homogeneous shading and a vertical light gradient.• Absolute petiole elongation in response to both shading treatments and absolute leaf area expansion in response to homogeneous shading were independent of the trait values expressed in high light. Consequently, relative plasticity was higher for genotypes with lower high-light trait values. Plasticity was associated with enhanced plant performance in a vertical light gradient but not in homogeneously shaded conditions. We also found costs associated with the ability to express plasticity.• Our results suggest that selection can act separately on trait values expressed under high-light conditions and on the degree of plasticity.

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“…5) might have coincided with differences in leaf flushing phenology. In such case, differences in HI patterns might be related to distinct functional traits (Geber and Griffen 2003;Reich et al 2003), represented in the studied clones. Nevertheless, the differences of HI variation patterns between the groups of clones (Figs.…”

Section: Discussionmentioning

confidence: 96%

Height increment of hybrid aspen <i>Populus tremuloides</i> x <i>P. tremula</i> as a function of weather conditions in central part of Latvia

Jansons¹,

Zeps²,

Rieksts-Riekstiņš³

et al. 2014

Silva Fenn.

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Height increment of hybrid aspen Populus tremuloides × P. tremula as a function of weather conditions in south-western part of Latvia Jansons Ā., Zeps M., Rieksts-Riekstiņš J., Matisons R., Krišāns O. (2014). Height increment of hybrid aspen Populus tremuloides × P. tremula as a function of weather conditions in southwestern part of Latvia. Silva Fennica vol. 48 no. 5 article id 1124. 13 p. Highlights• Intra-annual height growth of hybrid aspen was monitored.• Clones with early leaf flushing dates showed faster height growth.• Height growth was generally controlled by temperature.• Fast-growing hybrids were more robust to weather conditions than slow-growing ones.• Potential evapotranspiration (moisture regime) negatively affected height growth of clones with delayed phenology. AbstractHeight growth of young hybrid aspen (Populus tremula L. × P. tremuloides Michx.) was studied in relation to weather conditions. Height of clones with different leaf flushing phenology (early, intermediate and late) was monitored during the growing periods of 2010 and 2011 in a plantation established on former agricultural land. Mean daily height increment (HI) was calculated. Multiple linear regression was used to determine which weather factors (variables) had significant effect on HI. Mean seasonal height growth (mean seasonal HI) between clones (groups) was compared by ANOVA. In both years, HI was significantly higher for clones with early and intermediate leaf flushing compared to clones with late leaf flushing. The effect of weather factors also differed between clones according to their leaf flushing phenology; it was the weakest for HI of clones with early leaf flushing compared to clones with intermediate and late leaf flushing. Mean temperature was the main factor, which positively affected HI of all clones, suggesting that warmer climate might be beneficial for height growth of young hybrid aspen in Latvia. Nevertheless, significant negative relationship between HI and potential evapotranspiration (PET) was observed for clones with delayed leaf flushing, suggesting negative effect of increasing variability of precipitation on growth. Thus, the differences in height growth intensity might be related to growth sensitivity to weather conditions. On the other hand, such differences in height growth between clones might be caused by competition (i.e. with herbs), as trees with early leaf flushing might conquer more resources and become more robust against the environmental fluctuation.

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Inheritance and Natural Selection on Functional Traits

Cited by 402 publications

References 150 publications

Response to joint selection on germination and flowering phenology depends on the direction of selection

Response to joint selection on germination and flowering phenology depends on the direction of selection

Shade avoidance inTrifolium repens: costs and benefits of plasticity in petiole length and leaf size

Height increment of hybrid aspen <i>Populus tremuloides</i> x <i>P. tremula</i> as a function of weather conditions in central part of Latvia

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