Genetic relationship between <i>Echinochloa crus‐galli</i> and <i>Echinochloa oryzicola</i> accessions inferred from internal transcribed spacer and chloroplast DNA sequences

Aoki, Daisuke; Yamaguchi, Hirofumi

doi:10.1111/j.1445-6664.2008.00303.x

Cited by 47 publications

(63 citation statements)

References 22 publications

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“…Thus, we can conclude that E. oryzicola is a paternal tetraploid donor of allohexaploid E. crus‐galli because the maternal lineage of E. oryzicola is clearly distant to that of E. crus‐galli , based on cpDNA analysis (Yamaguchi et al. 2005; Aoki & Yamaguchi 2008). The Ccr copy of the E. crus‐galli group is considered to be maternal.…”

Section: Discussionmentioning

confidence: 91%

Oryza sh4 gene homologue represents homoeologous genomic copies in polyploid Echinochloa

Aoki

Yamaguchi

2009

Weed Biology and Management

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The coding region sequence of the Oryza sh4 gene homologue in Echinochloa was analyzed in relation to the shattering nature of spikelets and the phylogeny of homologue copies in the Asian annual polyploidy Echinochloa. The Sh4 homoeologue copies were detected in Echinochloa oryzicola, Echinochloa crus-galli, Echinochloa stagnina, Echinochloa colona, and Echinochloa crus-pavonis. Amino acid sequence differences did not lead to a functional change in the sh4 gene between the shattering and non-shattering types in E. crus-galli, E. oryzicola, and E. colona. A phylogenetic analysis of the homoeologous copy sequences indicated a genomic relationship between the Asian Echinochloa species and supported that the allohexaploid E. crus-galli shares two genomes with its parental donor, E. oryzicola. The Asian perennial tetraploid species, E. stagnina, shares one genome with E. oryzicola and possesses an unknown genome. Echinochloa crus-pavonis, from the New World, shows a close affinity of two genomes with E. crus-galli and E. oryzicola. Echinochloa colona showed distant affinities in all homoeologous copies.

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Section: Discussionmentioning

confidence: 91%

Oryza sh4 gene homologue represents homoeologous genomic copies in polyploid Echinochloa

Aoki

Yamaguchi

2009

Weed Biology and Management

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“…Despite this impact, there is little genetic information about its evolutionary history, although recent studies have better resolved phylogenetic relationships within Echinochloa. Once thought to be conspecific with E. oryzicola, E. crus-galli (a separate hexaploid weed species) is now thought to have arisen through the hybridization of E. oryzicola (tetraploid) and an unknown diploid species (Aoki and Yamaguchi, 2008). E. crus-galli is also a successful weed of several crops but functions as a generalist, whereas E. oryzicola has adapted to mimic rice in morphology and phenology.…”

Section: The Origins Of Agricultural Weedsmentioning

confidence: 99%

The red queen in the corn: agricultural weeds as models of rapid adaptive evolution

2012

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Weeds are among the greatest pests of agriculture, causing billions of dollars in crop losses each year. As crop field management practices have changed over the past 12 000 years, weeds have adapted in turn to evade human removal. This evolutionary change can be startlingly rapid, making weeds an appealing system to study evolutionary processes that occur over short periods of time. An understanding of how weeds originate and adapt is needed for successful management; however, relatively little emphasis has been placed on genetically characterizing these systems. Here, we review the current literature on agricultural weed origins and their mechanisms of adaptation. Where possible, we have included examples that have been genetically well characterized. Evidence for three possible, non-mutually exclusive weed origins (from wild species, crop-wild hybrids or directly from crops) is discussed with respect to what is known about the microevolutionary signatures that result from these processes. We also discuss what is known about the genetic basis of adaptive traits in weeds and the range of genetic mechanisms that are responsible. With a better understanding of genetic mechanisms underlying adaptation in weedy species, we can address the more general process of adaptive evolution and what can be expected as we continue to apply selective pressures in agroecosystems around the world.

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“…oryzicola and E. oryzoides (Ard.) Fritsch . Although some of these taxa can be conventionally identified on the basis of their spikelet morphological traits and ecological habits, a significant amount of skill is required for their accurate identification, as the morphological features of the spikelet frequently overlap within and between species/taxa …”

Section: Introductionmentioning

confidence: 99%

Target‐site mutation associated with cross‐resistance to ALS‐inhibiting herbicides in late watergrass (Echinochloa oryzicola Vasing.)

Kaloumenos

Chatzilazaridou

Mylona

et al. 2012

Pest Management Science

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Genetic relationship between Echinochloa crus‐galli and Echinochloa oryzicola accessions inferred from internal transcribed spacer and chloroplast DNA sequences

Cited by 47 publications

References 22 publications

Oryza sh4 gene homologue represents homoeologous genomic copies in polyploid Echinochloa

Oryza sh4 gene homologue represents homoeologous genomic copies in polyploid Echinochloa

The red queen in the corn: agricultural weeds as models of rapid adaptive evolution

Target‐site mutation associated with cross‐resistance to ALS‐inhibiting herbicides in late watergrass (Echinochloa oryzicola Vasing.)

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