Transfer of clover cyst nematode resistance from Trifolium nigrescens Viv. to T. repens L. by interspecific hybridisation

Hussain, S. W.; Williams, W. M.; Mercer, C. F.; White, Derek W. R.

doi:10.1007/s001220050693

Cited by 36 publications

(16 citation statements)

References 14 publications

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“…Crosses have been made between white clover and the diploid annual species T. nigrescens (ball clover) (2n = 2x = 16), a profusely flowering species that has high seed yield relative to white clover and good nematode resistance, to introgress cyst nematode resistance (Hussain et al, 1997), root-knot nematode resistance (Pederson and Windham, 1989), and high inflorescence production and seed set into white clover. For this latter breeding target, a backcrossing program has produced selection lines that combine the agronomic characteristics of white clover with increased seed yield due to increased inflorescence production .…”

Section: B White Clovermentioning

confidence: 99%

Achievements and Challenges in Improving Temperate Perennial Forage Legumes

Annicchiarico¹,

Barrett²,

Brummer³

et al. 2014

Critical Reviews in Plant Sciences

230

233

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Section: B White Clovermentioning

confidence: 99%

Achievements and Challenges in Improving Temperate Perennial Forage Legumes

Annicchiarico¹,

Barrett²,

Brummer³

et al. 2014

Critical Reviews in Plant Sciences

230

233

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“…T. nigrescens is investigated for its potential as germplasm for the improvement of T. repens through interspecific hybridization. So far, hybrids between these two species have been developed to introduce resistance to H. trifolii and some reproductive traits into T. repens as a means of improving seed yield (Hussain et al 1997;Marshall et al 2002Marshall et al , 2008.…”

Section: Introductionmentioning

confidence: 99%

Somatic embryogenesis and plant regeneration in zygotic embryos of Trifolium nigrescens (Viv.)

Konieczny

Pilarska

Tuleja

et al. 2009

Plant Cell Tiss Organ Cult

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This study developed a plant regeneration protocol for Trifolium nigrescens (Viv.) via somatic embryogenesis (SE). Immature zygotic embryos at torpedo (TsE) and cotyledonary (CsE) stage were cultured on media with different auxins and cytokinins at different concentrations. The cultural requirements for SE differed between the explants used: the addition of 6-furfurylaminopurine (kinetin) or N 6 -[2-isopentenyl]-adenine (2iP) along with 2,4-dihydrophenoxyacetic acid (2,4-D) or 1-naphthaleneacetic acid (NAA) was needed to elicit the embryogenic response of CsE, but an exogenous cytokinin totally inhibited 2,4-D-induced SE from TsE. When applied alone, neither the cytokinin nor NAA induced SE in TsE or CsE. In all effective cultures the first somatic embryos appeared directly from the upper part of the hypocotyl (TsE and CsE) and from the margin of cotyledons (TsE) on day 7. Embryogenic callus occurred on CsE after 10 days. At comparable concentrations 2,4-D was a more potent SE inducer than NAA, but most of the embryoids induced on media with 2,4-D displayed morphological abnormalities, whereas those produced in the presence of NAA generally resembled zygotic embryos.Plant regeneration was achieved after transfer of somatic embryos or embryo-derived first shoots to medium without plant growth regulators (PGRs). The frequency of plant recovery was about 30% for embryoids obtained on media containing 2,4-D, and for material from media with NAA the recovery rates were 44-68% (somatic embryos) and 72-100% (embryoid-derived shoots). Regenerants appeared identical to each other and to wild plants; they produced flowers and had the chromosome complement typical for the species, 2n = 16, in root tip cells.

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“…Bieb., for the desirable traits such as rhizomatous habitus (Paplauskiene et al 2004), persistence and tolerance to moisture stress (Marshall et al 2001), clover cyst nematode resistance (Hussain et al 1997) and T. repens and T. hybridum for reproductive traits (as a means of improving the seed yield) presented by Marshall et al 1995Marshall et al , 1998Marshall et al , 2002. However, there have been no reports on hybrid plants being used as germplasm in conventional breeding.…”

Section: Discussionmentioning

confidence: 99%

Variation of morphological and agronomic traits in hybrids of Trifolium pratense × T. medium and a comparison with the parental species

Jakešová¹,

Řepková²,

Hampel³

et al. 2011

CZECH J GENET PLANT

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Trifolium pratense L. is a high-yielding and high-quality fodder crop. However, it shows low persistence, which may be overcome by hybridisation with species that produce rhizomes. Hybrids between T. pratense L. and T. medium L. were previously obtained by embryo rescue. The aim of this study was to evaluate 16 characteristics (stem weight, stem length, internode number, length/width ratio of a central leaflet of the trifoliate leaf on the 4 th internode, stem thickness on the 4 th internode, average leaf area of the trifoliate leaf, weight of dry plant, was significantly higher in the hybrids compared to both parental species, which could have a positive impact on the yield. Short rhizomes were observed in the hybrids after the harvest of plants in the second harvest year. The stability of this trait and its impact on the perenniality of the hybrids will be investigated in the next years.Keywords: interspecific hybrids; morphological traits; persistence; red clover; rhizomes; zigzag cloverThe red clover (Trifolium pratense L.) is a widespread forage crop in the Czech Republic as well as in the rest of Europe. It is a high-yielding and high-quality fodder crop from the aspect of both nutrient content and ensilage suitability. Red clover has a high content of proteins, water-soluble carbohydrates, tannins, polyphenol oxidase and polyunsaturated fatty acids.Clover breeding is aimed at the production of fresh and dry matter that is of high quality combined with satisfactory seed yields. Polyploidy induction (tetraploidy 2n = 4x = 28) in red clover is useful for obtaining varieties with higher fodder production compared to diploids because autoploidy increases the cell size, especially in meristematic tissues, and the autoploids usually

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Transfer of clover cyst nematode resistance from Trifolium nigrescens Viv. to T. repens L. by interspecific hybridisation

Cited by 36 publications

References 14 publications

Achievements and Challenges in Improving Temperate Perennial Forage Legumes

Achievements and Challenges in Improving Temperate Perennial Forage Legumes

Somatic embryogenesis and plant regeneration in zygotic embryos of Trifolium nigrescens (Viv.)

Variation of morphological and agronomic traits in hybrids of Trifolium pratense × T. medium and a comparison with the parental species

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