Gametophytic selection for wilt resistance and its impact on the segregation of wilt resistance alleles in chickpea (Cicer arietinum L.)

Ravikumar, R. L.; Chaitra, G. N.; Choukimath, A. M.; Soregaon, C. D.

doi:10.1007/s10681-012-0745-6

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…With the development of molecular markers, SD has been widely reported in several plant species, particularly in interspecific crosses for genetic mapping, such as rice (Shanmugavadivel et al, 2013), wheat (Takumi et al, 2013; Adamski et al, 2014), chickpea (Ravikumar et al, 2013), Arabidopsis (Leppala et al, 2013), coffee (Gartner et al, 2013), soybean (Baumbach et al, 2012), potato (Manrique-Carpintero et al, 2016), Brassica rapa (Kitashiba et al, 2016), and Populus deltoids (Zhou et al, 2015). SD has previously been reported in interspecific populations of cotton (Guo et al, 2007; Blenda et al, 2012; Byers et al, 2012; Liang et al, 2012; Yu et al, 2013; Diouf et al, 2014; Zhang et al, 2014; Li et al, 2016), intraspecific populations of G. barbadense (Wang et al, 2013), intraspecific populations of G. hirsutum (Lin et al, 2009; Zhang et al, 2012, 2016; Ning et al, 2014), and intraspecific populations of G. arboreum (Li et al, 2007); however, the genetic mechanism of SD in cotton remains unclear.…”

Section: Discussionmentioning

confidence: 99%

Identification and Characterization of Segregation Distortion Loci on Cotton Chromosome 18

et al. 2017

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Segregation distortion is commonly detected via genetic mapping and this phenomenon has been reported in many species. However, the genetic causes of the segregation distortion regions in a majority of species are still unclear. To genetically dissect the SD on chromosome 18 in cotton, eight reciprocal backcross populations and two F2 populations were developed. Eleven segregation distortion loci (SDL) were detected in these ten populations. Comparative analyses among populations revealed that SDL18.1 and SDL18.9 were consistent with male gametic competition; whereas SDL18.4 and SDL18.11 reflected female gametic selection. Similarly, other SDL could reflect zygotic selection. The surprising finding was that SDL18.8 was detected in all populations, and the direction was skewed towards heterozygotes. Consequently, zygotic selection or heterosis could represent the underlying genetic mechanism for SDL18.8. Among developed introgression lines, SDL18.8 was introgressed as a heterozygote, further substantiating that a heterozygote state was preferred under competition. Six out of 11 SDL on chromosome 18 were dependent on the cytoplasmic environment. These results indicated that different SDL showed varying responses to the cytoplasmic environment. Overall, the results provided a novel strategy to analyze the molecular mechanisms, which could be further exploited in cotton interspecific breeding programs.

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Section: Discussionmentioning

confidence: 99%

Identification and Characterization of Segregation Distortion Loci on Cotton Chromosome 18

et al. 2017

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“…For example, manipulating the placement of pollen on stigmas, the number of pollen donors, or the amount of pollen deposited alters the strength of pollen competition, often with measurable effects on offspring fitness (Snow and Spira 1996;Skogsmyr and Lankinen 1999;Aronen et al 2002;Lankinen and Skogsmyr 2002;Lankinen et al 2009). Furthermore, directly exposing pollen to selection (e.g., altered temperatures, herbicides, or other stressors) can hasten the breeding of plant strains adapted to those conditions (Searcy and Mulcahy 1985;Frascaroli and Songstad 2001;Ravikumar et al 2003Ravikumar et al , 2012Clarke et al 2004;Hedhly et al 2004;Scott 2016). At the sequence level, pollen-specific oleosin-like proteins (Schein et al 2004) and glycine-rich pollen surface proteins (Fiebig et al 2004) show signs of rapid evolution, supporting the notion that selection on haploid-expressed genes can be effective.…”

Section: Rate Of Adaptationmentioning

confidence: 99%

The Evolutionary Consequences of Selection at the Haploid Gametic Stage

Immler¹,

Otto

2018

The American Naturalist

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As an immediate consequence of sexual reproduction, biphasic life cycles with alternating diploid and haploid phases are a common characteristic of sexually reproducing eukaryotes. Much of our focus in evolutionary biology has been directed toward dynamics in diploid or haploid populations, but we rarely consider selection occurring during both phases when studying evolutionary processes. One of the reasons for this apparent omission is the fact that many flowering plants and metazoans are predominantly diploid with a very short haploid gametic phase. While this gametic phase may be short, it can play a crucial role in fundamental processes including the rate of adaptation, the load of mutation, and the evolution of features such as recombination. In addition, if selection acts in different directions between the two phases, a genetic conflict will occur, impacting the maintenance of genetic variation. Here we provide an overview of theoretical and empirical studies investigating the importance of selection at the haploid gametic phase in predominantly diploid organisms and discuss future directions to improve our understanding of the underlying dynamics and the general implications of haploid selection.

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“…In plants, selection among haploid male gametophytes is thought to be pervasive (Skogsmyr and Lankinen 2002;Moore and Pannell 2011;Marshall and Evans 2016); in Arabidopsis, 60-70% of all genes are expressed during the haploid phase (Borg et al 2009), and pollen-expressed genes exhibit stronger signatures of purifying selection and positive selection (Arunkumar et al 2013;Gossmann et al 2014). For agricultural breeding, pollen has been exposed to a variety of selection pressures in vivo and in vitro, including temperature (Clarke et al 2004;Hedhly et al 2004), herbicides (Frascaroli and Songstad 2001), metals (Searcy and Mulcahy 1985), water stress (Ravikumar et al 2003), and pathogens (Ravikumar et al 2012), resulting in an increased frequency of beneficial genotypes among the diploid sporophytic offspring. In animals, expression during the haploid sperm stage is traditionally thought to be suppressed (Hecht 1998), although recent evidence suggests that postmeiotic gene expression occurs (Zheng et al 2001;Vibranovski et al 2010), that hundreds of genes are haploid selected (Joseph and Kirkpatrick 2004), and that haploid selection can impact offspring fitness (Immler et al 2014;Alavioon et al 2017).…”

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confidence: 99%

Haploid Selection Favors Suppressed Recombination Between Sex Chromosomes Despite Causing Biased Sex Ratios

Scott

Otto

2017

Genetics

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To date, research on the evolution of sex chromosomes has focused on sexually antagonistic selection among diploids, which has been shown to be a potent driver of the strata and reduced recombination that characterize many sex chromosomes. However, significant selection can also occur on haploid genotypes during less conspicuous life cycle stages, , competition among sperm/pollen or meiotic drive during gamete/spore production. These haploid selective processes are typically sex-specific,, gametic/gametophytic competition typically occurs among sperm/pollen, and meiotic drive typically occurs during either spermatogenesis or oogenesis. We use models to investigate whether sex-specific selection on haploids could drive the evolution of recombination suppression on the sex chromosomes, as has been demonstrated for sex-specific selection among diploids. A potential complication is that zygotic sex-ratios become biased when haploid selected loci become linked to the sex-determining region because the zygotic sex ratio is determined by the relative number and fitness of X- Y-bearing sperm. Despite causing biased zygotic sex-ratios, we find that a period of sex-specific haploid selection generally favors recombination suppression on the sex chromosomes. Suppressed recombination is favored because it allows associations to build up between haploid-beneficial alleles and the sex that experiences haploid selection most often (, pollen beneficial alleles become strongly associated with the male determining region, Y or Z). Haploid selected loci can favor recombination suppression even in the absence of selective differences between male and female diploids. Overall, we expand our view of the sex-specific life cycle stages that can drive sex chromosome evolution to include gametic competition and meiotic drive. Based on our models, sex chromosomes should become enriched for genes that experience haploid selection, as is expected for genes that experience sexually antagonistic selection. Thus, we generate a number of predictions that can be evaluated in emerging sex chromosome systems.

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Gametophytic selection for wilt resistance and its impact on the segregation of wilt resistance alleles in chickpea (Cicer arietinum L.)

Cited by 7 publications

References 35 publications

Identification and Characterization of Segregation Distortion Loci on Cotton Chromosome 18

Identification and Characterization of Segregation Distortion Loci on Cotton Chromosome 18

The Evolutionary Consequences of Selection at the Haploid Gametic Stage

Haploid Selection Favors Suppressed Recombination Between Sex Chromosomes Despite Causing Biased Sex Ratios

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