Aneuploidy in induced autotetraploid populations of Festuca pratensis, Lolium multiflorum and Lolium perenne

Klinga, Karin

doi:10.1111/j.1601-5223.1986.tb00519.x

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…Our results indicate that the transmission of aneuploids in autotetraploid Arabidopsis occurs in both male and female gametes, with increased hyperploid transmission arising mainly in female (embryosac) cells. Of the two autotetraploid Festuca pratensis, Lolium multiflorum produces more hyperploids, but Lolium perenne shows equal yields in hypoploids and hyperploids (Klinga 1986). Euploids were superior to aneuploids and hyperploids were superior to hypoploids in most developmental features' furthermore, aneuploidy had more pronounced effects on reproductive development (Klinga 1986).…”

Section: Discussionmentioning

confidence: 96%

“…Of the two autotetraploid Festuca pratensis, Lolium multiflorum produces more hyperploids, but Lolium perenne shows equal yields in hypoploids and hyperploids (Klinga 1986). Euploids were superior to aneuploids and hyperploids were superior to hypoploids in most developmental features' furthermore, aneuploidy had more pronounced effects on reproductive development (Klinga 1986). In contrast, aneuploids in tetraploid ryegrass were morphologically indistinguishable from eu-tetraploids (Ahloowalia 1971).…”

Section: Discussionmentioning

confidence: 96%

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Meiotically asynapsis-induced aneuploidy in autopolyploid Arabidopsis thaliana

Wei

Zhang

2009

J Plant Res

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The patterns of homologue segregation are the basis for euploidy or aneuploidy formation in diploids and allo-/auto-polyploids. Homologue segregation in diploids resembles that in allopolyploids during meiosis; however, meiotic chromosome behavior in autopolyploids is complicated by multiplication of homologous chromosome components. Obviously, loss of single chromosomes (or segmented chromosomes) frequently leads to abortion of reproductive gametes in diploids and allopolyploids. In contrast, the consequence of chromosome loss in autopolyploids is effortlessly compensated for by the presence of multiplied chromosome complements. Here, we use the meiotically asynaptic gene asy1, in combination with polyploidization, to elucidate aneuploidy formation in autotetraploid Arabidopsis. The results indicate that, due to homologous asynapsis in meiotic prophase I, retarded chromosome losses could induce aneuploidy during gametogenesis in autotetraploid asy1. The severe loss of individual chromosomes probably reaches the haploid genome among selfed or backcrossed progeny, leading to stochastic chromosome loss in Arabidopsis. Reciprocal crosses of autotetraploid asy1 with wild-type prove a pathway of duoparental transmission of aneuploidy (hypoploidy and hyperploidy). Viable hypoploids over-transmit via male gametes; conversely, viable hyperploids transmit mainly in female gametogenesis. This result suggests a more stringent maternal restriction of ploidy transmission in autopolyploid Arabidopsis.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 96%

Meiotically asynapsis-induced aneuploidy in autopolyploid Arabidopsis thaliana

Wei

Zhang

2009

J Plant Res

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Aneuploidy in induced autotetraploid populations of Festuca pratensis, Lolium multiflorum and Lolium perenne

Klinga

2008

Hereditas

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Frequencies of aneuploids were determined in three induced autotetraploid populations of Lolium, two of L. multiflorum, and one of L. perenne. Vegetative and generative properties of euploids, hypoploids, and hyperploids grown as spaced plants were studied. Before chromosome counts, the seed lots were sieved into five seed size fractions. Chromosome numbers were determined by a modification of conventional root tip squash. The total aneuploid frequency in Lolium multiflorum, Sv 02054 was 52.6%, in Sv 02056 50.7%, and finally in Lolium perenne, Sv 01413, the total aneuploid frequency was 41.9%. There are no or only weak relations between seed size and chromosome number in these populations. Among the aneuploid chromosome classes, the hypoploid was the largest one in all fractions in the three populations Vegetative and generative characters were measured. Significant negative effects of aneuploidy were only found in the generative characters There were no significant differences in heading time between chromosome classes in either of the populations.

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Aneuploidy in induced autotetraploid populations of Festuca pratensis, Lolium multiflorum, and Lolium perenne III. Performance of plants at different sowing densities in a perennial sward of tetraploid Festuca pratensis

Klinga

2008

Hereditas

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Klinga, K. 1987. Aneuploidy in induced autotetraploid populations of Festuca pratensis, Lolium multiflorum, and Lolium perenne. III. Performance of plants at different sowing densities in a perennial sward of tetraploid Festuca pratensis‐Hereditas 106:277–287. Lund, Sweden. ISSN 0018–0661. Received February 6, 1987 The productivity of an induced tetraploid population of Festuca pratensis at different sowing densities displayed a typical yield‐density response. There was a positive response in yield with increasing densities only early in the development of the sward. As the time passed, the variations in sowing densities were compensated by an altered growth made by individual plants. The mortality pattern of plants varied among seasons. During the establishing phase of the sward the mortality was not density dependent. The inferior ability of aneuploids to establish in the sward relative to the euploids was diplayed by a higher mortality of aneuploids. As the plants had grown larger, the mortality of plants became density dependent. Competition started to affect the aneuploids earlier in the development of the sward than the euploids, reflected by a differentiated mortality pattern of aneuploids and euploids. The aneuploid frequency in the seed lot was 29.1 %, and in the end of the experiment the aneuploid frequency was reduced to percentages ranging from 7.9% to 15.7%. The lower productivity of the aneuploids affected the yield only at the early stages of the sward development. Later, the surviving aneuploids were too few to influence the total yield.

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Aneuploidy in induced autotetraploid populations of Festuca pratensis, Lolium multiflorum and Lolium perenne

Cited by 6 publications

References 11 publications

Meiotically asynapsis-induced aneuploidy in autopolyploid Arabidopsis thaliana

Meiotically asynapsis-induced aneuploidy in autopolyploid Arabidopsis thaliana

Aneuploidy in induced autotetraploid populations of Festuca pratensis, Lolium multiflorum and Lolium perenne

Aneuploidy in induced autotetraploid populations of Festuca pratensis, Lolium multiflorum, and Lolium perenne III. Performance of plants at different sowing densities in a perennial sward of tetraploid Festuca pratensis

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