Genetic Relatedness and Competition in<i>Triplasis purpurea</i>(Poaceae): Resource Partitioning or Kin Selection?

Cheplick, Gregory P.; Kane, Kristin H.

doi:10.1086/386556

Cited by 64 publications

(76 citation statements)

References 40 publications

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“…Cheplick & Kane 2004against Tonsor 1989. The evidence found in our work, along with that in other experiments (Allard & Adams 1969;Schmitt & Ehrhardt 1987;Kelley 1989;Cheplick & Kane 2004), conforms to the view that individuals living in the vicinity of strangers, and microcosms composed of unrelated individuals, attain higher fertility rates. Multiple mechanisms may account for this response pattern.…”

Section: Discussionmentioning

confidence: 99%

Growing with siblings: a common ground for cooperation or for fiercer competition among plants?

et al. 2009

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Recent work has shown that certain plants can identify their kin in competitive settings through root recognition, and react by decreasing root growth when competing with relatives. Although this may be a necessary step in kin selection, no clear associated improvement in individual or group fitness has been reported to qualify as such. We designed an experiment to address whether genetic relatedness between neighbouring plants affects individual or group fitness in artificial populations. Seeds of Lupinus angustifolius were sown in groups of siblings, groups of different genotypes from the same population and groups of genotypes from different populations. Both plants surrounded by siblings and by genotypes from the same population had lower individual fitness and produced fewer flowers and less vegetative biomass as a group. We conclude that genetic relatedness entails decreased individual and group fitness in L. angustifolius. This, together with earlier work, precludes the generalization that kin recognition may act as a widespread, major microevolutionary mechanism in plants.

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Section: Discussionmentioning

confidence: 99%

Growing with siblings: a common ground for cooperation or for fiercer competition among plants?

et al. 2009

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“…Such strategies have been observed for interspecific pairings which often reduce the competition through consuming different nitrogen (N) forms (McKane et al 2002;Xu et al 2011). This is called Bresource partitioning^ (Cheplick and Kane 2004). Fierce competition should occur within species because they have more niche overlap between species (Murphy and Dudley 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Initially, many studies have measured effects of growing with siblings or strangers on fitness (Cheplick and Kane 2004;Milla et al 2009) to understand mechanisms of kin selection and resource partitioning. Subsequently, some studies have investigated effects of growth with siblings or strangers on morphological and allocation traits (Dudley and File 2007;Murphy and Dudley 2009;.…”

Section: Introductionmentioning

confidence: 99%

Kin selection or resource partitioning for growing with siblings: implications from measurements of nitrogen uptake

et al. 2015

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Aims Kin selection and resource partitioning have been proposed to explain interactions between plants growing with siblings (from the same mother). These mechanisms have been examined by measurements of fitness, phenotype or allocation traits, but have seldom been tested with N acquisition traits. Methods We determine if kin selection and resource partitioning are occurring using two annual species (Sorghum vulgare and Glycine max) with a short-term 15 N experiment. A mixture of ammonium, nitrate and glycine (1:1:1) was injected into soils around plants after they grew for 47 days. Only one nitrogen (N) form was 15 N labeled in each labeling solution. Results S. vulgare increased root allocation when growing with strangers (from the different mother), but not increase their N uptake. Although G. max strangers did not increase their root allocation, they significantly increased uptake of total N and the most abundant N form (nitrate) and decreased uptake of the least abundant (glycine). Conclusions G. max siblings reduced competition due to chemical resource partitioning while S. vulgare showed kin selection. We concluded that processes related to kin selection and resource partitioning can occur simultaneously, resulting in different competitive ability. These findings can improve our understanding of plants growing with siblings or strangers.

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“…However, genetic variation may also directly alter the strength of selection: genetically dissimilar individuals may compete less than genetically similar individuals (Dempster 1955;Lewontin & Matsuo 1963;Maynard Smith 1978). Although evidence favouring this hypothesis is equivocal, experiments with plants (Allard & Adams 1969;Cheplick & Kane 2004;Reusch et al 2005;Boyden et al 2008), Drosophila (Pérez-Tomé & Toro 1982;Fowler & Partridge 1986;Martin et al 1988; López-Suárez et al 1993), territorial salmon (Griffiths & Armstrong 2001) and fire-bellied toads (Jasienski 1988) show that genetically heterogeneous groups of individuals have greater productivity than genetically similar groups, potentially due to more efficient niche partitioning within genetically diverse groups. Consequently, at a given population density genetically diverse populations may be subject to weaker selection for niche diversification compared with less diverse populations.…”

Section: Introductionmentioning

confidence: 99%

Intraspecific genetic variation and competition interact to influence niche expansion

Agashe

Bolnick

2010

Proc. R. Soc. B.

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Theory and empirical evidence show that intraspecific competition can drive selection favouring the use of novel resources (i.e. niche expansion). The evolutionary response to such selection depends on genetic variation for resource use. However, while genetic variation might facilitate niche expansion, genetically diverse groups may also experience weaker competition, reducing density-dependent selection on resource use. Therefore, genetic variation for fitness on different resources could directly facilitate, or indirectly retard, niche expansion. To test these alternatives, we factorially manipulated both the degree of genetic variation and population density in flour beetles (Tribolium castaneum) exposed to both novel and familiar food resources. Using stable carbon isotope analysis, we measured temporal change and individual variation in beetle diet across eight generations. Intraspecific competition and genetic variation acted on different components of niche evolution: competition facilitated niche expansion, while genetic variation increased individual variation in niche use. In addition, genetic variation and competition together facilitated niche expansion, but all these impacts were temporally variable. Thus, we show that the interaction between genetic variation and competition can also determine niche evolution at different time scales.

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Genetic Relatedness and Competition inTriplasis purpurea(Poaceae): Resource Partitioning or Kin Selection?

Cited by 64 publications

References 40 publications

Growing with siblings: a common ground for cooperation or for fiercer competition among plants?

Growing with siblings: a common ground for cooperation or for fiercer competition among plants?

Kin selection or resource partitioning for growing with siblings: implications from measurements of nitrogen uptake

Intraspecific genetic variation and competition interact to influence niche expansion

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