Segregation of Isozyme Marker Loci Amongst Androgenetic Plants of <i>Lolium perenne</i> L.

Hayward, M. D.; Olesen, Arne Vestergaard; Due, I. K.; Jenkins, Richard K. B.; Morris, Phillip

doi:10.1111/j.1439-0523.1990.tb00404.x

Cited by 32 publications

(10 citation statements)

References 7 publications

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“…This type of segregation has also been reported in the DH populations of many crops including Lolium perenne (Hayward et al, 1990), barley (Powell et al, 1986;Thompson et al, 1991), and rice (Guiderdoni et al, 1989). One Table 3.…”

Section: Discussionmentioning

confidence: 90%

“…Alternatively, it is possible that there is selection among the plantlets themselves. In a study Hayward et al (1990) indicated that a genetic component is responsible for disturbed segregations in Lolium. They explained the allele in excess as being linked to the viability genes affecting the generating ability and described them as lethal genes which usually occur in high frequency in naturally out-breeding species.…”

Section: Discussionmentioning

confidence: 99%

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Diploidization and Genetic Variation in Anther Cultured Populations of Lolium perenne L.

Hossain

Maya

Evans

et al. 1999

Plant Biotechnology

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Four hundred and six anther culture developed progeny plants of eight different families of Lolium perenne L. were evaluated for their ploidy level, genetic variation at isozyme loci and performance at field level. Seventy six percent of the total progeny plants were found to be diploids , (2n=14) but the rate of diploidization varied from family to family. The segregations of eight isozyme loci among the progeny families and their level of heterozygosity were assessed. The heterozygosity was found to be low for all, only one family segregated at four isozyme loci and the rest were even lower . The field performance of the artificial homozygous naturally out-breeding species was evaluated and none could survive to the extreme environmental conditions over the winter, however they grew under controlled conditions.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Diploidization and Genetic Variation in Anther Cultured Populations of Lolium perenne L.

Hossain

Maya

Evans

et al. 1999

Plant Biotechnology

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“…Additionally, segregation distortion due to in vitro androgenesis, resulting in higher allele frequencies of the donor most amenable to tissue culture, can thus be avoided [29,[87][88][89][90][91] [92]. Selection could be performed on the vigorous F 1 hybrids prior to inflorescence harvest and the subsequent recovery of 1-5 DHs per plant [93].…”

Section: Future Applications Of Haploid and Doubled Haploid Techniquementioning

confidence: 99%

Haploid and Doubled Haploid Techniques in Perennial Ryegrass (Lolium perenne L.) to Advance Research and Breeding

2016

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Abstract:The importance of haploid and doubled haploid (DH) techniques for basic and applied research, as well as to improve the speed of genetic gain when applied in breeding programs, cannot be overstated. They have become routine tools in several major crop species, such as maize (Zea mays L.), wheat (Triticum aestivum L.), and barley (Hordeum vulgare L.). DH techniques in perennial ryegrass (Lolium perenne L.), an important forage species, have advanced to a sufficiently successful and promising stage to merit an exploration of what their further developments may bring. The exploitation of both in vitro and in vivo haploid and DH methods to (1) purge deleterious alleles from germplasm intended for breeding; (2) develop mapping populations for genetic and genomic studies; (3) simplify haplotype mapping; (4) fix transgenes and mutations for functional gene validation and molecular breeding; and (5) hybrid cultivar development are discussed. Even with the comparatively modest budgets of those active in forage crop improvement, haploid and DH techniques can be developed into powerful tools to achieve the acceleration of the speed of genetic gain needed to meet future agricultural demands.

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“…The same principle can be used to test whether the segregations observed in haploid progenies derived from heterozygotes at marker loci, segregate according to the expected 1:1 ratio. Orton and Browers (1985) in Brassica aleracea, and Hayward et a/. (1990) in Lalium perenne analysed such segregations at four and two isozyme loci respectively.…”

Section: Applications Of Unmapped Markersmentioning

confidence: 99%

Marker-assisted selection

Arús¹,

Moreno-González²

1993

Plant Breeding

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Segregation of Isozyme Marker Loci Amongst Androgenetic Plants of Lolium perenne L.

Cited by 32 publications

References 7 publications

Diploidization and Genetic Variation in Anther Cultured Populations of Lolium perenne L.

Diploidization and Genetic Variation in Anther Cultured Populations of Lolium perenne L.

Haploid and Doubled Haploid Techniques in Perennial Ryegrass (Lolium perenne L.) to Advance Research and Breeding

Marker-assisted selection

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