A report of hybridisation in Hymenachne (Poaceae, Panicoideae) with description of Hymenachne x calamitosa, a new species of hybrid origin from tropical Australia

Clarkson, John R.; Mirko, Karan; Evans, David M.

doi:10.7751/telopea20116008

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…RAPD has been widely used in determination of intraspecific as well as interspecific variations (Pharmawati et al 2004;Noormohammadi et al 2012), plant cultivar and varietal identification (Chaudhary et al 2010;Sun et al 2012). RAPD marker was proved to be able to identify hybridity of putative hybrids and their parents both in natural or spontaneous hybridizations (Tovae-Sanchez & Oyama 2004;El-Kamali et al 2010;Clarkson et al 2011;Yulita & Mansur 2012) as well as in artificial crosses (Chen & Mii 2012;Narendrula & Nkongolo 2012). In this study, PCR-RAPD was employed to examine genetic variations and molecular relationship of several Grevillea hybrids.…”

Section: Introductionmentioning

confidence: 99%

The Genetic Relationships of Grevillea Hybrids Determined by RAPD Marker

Pharmawati

Macfarlane

2013

HAYATI Journal of Biosciences

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Grevillea (Proteaceae) is native to Australia and is known as garden plant. The flowers have high diversity colors, which range over orange, yellow, pink, red and green. It is a large genus, consisted of 357 species. This genus is economically important and there are hundreds of Grevillea hybrids with beautiful color and shape of flower. Information of the genetic relationships of Grevillea hybrids is not yet available. Ten Grevillea hybrids were used in this study to evaluate the genetic relationships between hybrids and with their parents. PCR-RAPD technique was employed in this study with seven RAPD primers. The dendrogram of Grevillea hybrids was performed using Neighbor-Joining analysis based on genetic distance. The analysis revealed that 'Moonlight', 'Caloundra Gem', and Little Pink Willie' were clustered with Grevillea banksii. The three hybrids were hybrid of G. banksii and other Grevillea species. 'Superb' was closely related to 'Robyn Gordon' as they are hybrid of G. banksii and G. bipinnatifida.

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Section: Introductionmentioning

confidence: 99%

The Genetic Relationships of Grevillea Hybrids Determined by RAPD Marker

Pharmawati

Macfarlane

2013

HAYATI Journal of Biosciences

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“…As the ITS region is biparentally inherited with many copies throughout the genome, an additive pattern is expected to be seen in the Sanger chromatogram for recently derived hybrids as both parental regions are sequenced simultaneously (Baumel et al 2001;Álvarez & Wendel 2003;Kaplan & Fehrer 2004). This additive pattern is consistent in F1 hybrids but may be quickly lost in subsequent generations as ITS will tend back towards a parent (Fuertes Aguilar et al 1999;Clarkson et al 2011). As a consistent, additive pattern was seen in the ITS region of all hybrids sequenced, it is likely that these are very recently derived hybrids, likely F1 hybrids.…”

Section: Discussionmentioning

confidence: 98%

Spontaneous hybridization among invasive Poaceae in Hawai‘i: Chloris × pseudosagrana nothosp. nov. and Cenchrus × peregrinus nothosp. nov.

FACCENDA,

YORKSTON,

ROSS

et al. 2024

Phytotaxa

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During grass surveys across the islands of Hawai‘i in 2022, two novel hybrids among non-native Poaceae were found growing on roadsides. Spontaneous hybridization was observed among Chloris barbata and C. divaricata on O‘ahu and among Cenchrus clandestinus and C. setaceus on Hawai‘i island. Morphological evidence initially suggested these plants may be hybrids and molecular analysis using the ITS and rpl32-trnL regions confirmed that the plants are hybrids and identified their parentage. These hybrids are named Chloris × pseudosagrana nothosp. nov. and Cenchrus × peregrinus nothosp. nov. No developed seeds could be found on either of these hybrids and they are suspected to be sterile F1 hybrids. The occurrence of hybridization events among other non-native species are also discussed.

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“…Summing up, the results of the Bayesian admixture analyses using STRUCTURE indicated that introgression was asymmetric, with J. erucifolia contributing more to the genomic composition of the hybrids than J. vulgaris . Such hybrids demonstrated a closer relationship to one parent, usually suggesting frequent backcrossing (Clarkson et al, 2011 ; Winter et al, 2013 ). Furthermore, hybrid indices showed that backcrosses with J. vulgaris were rare (three individuals).…”

Section: Discussionmentioning

confidence: 99%

“…relationship to one parent, usually suggesting frequent backcrossing (Clarkson et al, 2011;Winter et al, 2013). Furthermore, hybrid indices showed that backcrosses with J. vulgaris were rare (three individuals).…”

Section: Mm5-2 N N a C T ─ T C C T T A G T T G C T G T A A G T ─ C A ...mentioning

confidence: 99%

No wonder, it is a hybrid. Natural hybridization between Jacobaea vulgaris and J. erucifolia revealed by molecular marker systems and its potential ecological impact

Gawrońska,

Marszałek,

Kosiński

et al. 2023

Ecology and Evolution

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Progressive changes in the environment are related to modifications of the habitat. Introducing exotic species, and interbreeding between species can lead to processes that in the case of rare species or small populations threatens their integrity. Given the declining trends of many populations due to increased hybridization, early recognition of hybrids becomes important in conservation management. Natural hybridization is prevalent in Jacobaea. There are many naturally occurring interspecific hybrids in this genus, including those between Jacobaea vulgaris and its relatives. Although Jacobaea erucifolia and J. vulgaris often co‐occur and are considered closely related, apart from the few reports of German botanists on the existence of such hybrids, there is no information on research confirming hybridization between them. Morphologically intermediate individuals, found in the sympatric distributions of J. vulgaris and J. erucifolia, were hypothesized to be their hybrids. Two molecular marker systems (nuclear and chloroplast DNA markers) were employed to test this hypothesis and characterize putative hybrids. Nuclear and chloroplast DNA sequencing results and taxon‐specific amplified fragment length polymorphism (AFLP) fragment distribution analysis confirmed the hybrid nature of all 25 putative hybrids. The AFLP patterns of most hybrids demonstrated a closer relationship to J. erucifolia, suggesting frequent backcrossing. Moreover, they showed that several individuals previously described as pure were probably also of hybrid origin, backcrosses to J. erucifolia and J. vulgaris. This study provides the first molecular confirmation that natural hybrids between J. vulgaris and J. erucifolia occur in Poland. Hybridization appeared to be bidirectional but asymmetrical with J. vulgaris as the usual maternal parent.

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A report of hybridisation in Hymenachne (Poaceae, Panicoideae) with description of Hymenachne x calamitosa, a new species of hybrid origin from tropical Australia

Cited by 5 publications

References 12 publications

The Genetic Relationships of Grevillea Hybrids Determined by RAPD Marker

The Genetic Relationships of Grevillea Hybrids Determined by RAPD Marker

Spontaneous hybridization among invasive Poaceae in Hawai‘i: Chloris × pseudosagrana nothosp. nov. and Cenchrus × peregrinus nothosp. nov.

No wonder, it is a hybrid. Natural hybridization between Jacobaea vulgaris and J. erucifolia revealed by molecular marker systems and its potential ecological impact

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