The role of the male parent in the reproduction of Rubus

Jennings, D. L.; Craig, D. L.; Topham, Pauline B.

doi:10.1038/hdy.1967.4

Cited by 23 publications

(12 citation statements)

References 13 publications

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“…Application of auxin to the developing fruits frequently reduced the percentage emergence of seedlings, but the practice could be useful where the objective is to increase the survival of certain forms, such as ft genotypes or the sexual progeny of the apomict R. laciniatm (Jennings, Craig and Topham, 1967).…”

Section: Discussionmentioning

confidence: 99%

Some Genetic Factors Affecting Seedling Emergence in Raspberries

Jennings

1971

New Phytologist

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SUMMARYThe emergence of raspberry seedlings derived from two diallel crosses was studied, and also the effects on emergence of applying auxin to fruits 7 days after pollination. In one diallel, emergence was poor and the variations present were largely determined by maternal effects. In the other it was better and the largest variations were determined by inbreeding depression effects. In most cases maternal effects on emergence were negatively correlated with maternal effects on endosperm size, while inbreeding eifects were associated with reductions in embryo size. Maternal interaction effects were of minor importance and were probably correlated with effects on the endocarp. The auxin treatments had variable consequences according to their effects on the seed tissues. It is concluded that the factors which determined seedling emergence would tend to maintain heterozygosity and should therefore be regarded as part of the breeding system.

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Section: Discussionmentioning

confidence: 99%

Some Genetic Factors Affecting Seedling Emergence in Raspberries

Jennings

1971

New Phytologist

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“…Gametophytic apomixis has been well documented in blackberry species which belong to the genus Rubus, subgenus Rubus, section Rubus. The extensive crossing experiments carried out already by LIDFORSS (1905LIDFORSS ( , 1907 have since been supplemented by additional crossing data as well as cytological and embryological studies by, e.g., CRANE (1940), GUSTAFSSON (1943), CHRISTEN (1950), PRAIT and EINSET (1955), HASKELL (1960), JENNINGS et al (1967), CZAPIK (1983), andNYBOM (1988). In Rubus, apomixis is facultative and usually occurs by the formation of unreduced embryo sacs from sporogenous (diplospory) or other archesporal cells (apospory) (CHRISTEN 1950;BERGER 1953;PRATI and EINSET 1955;CZAPIK 1983).…”

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confidence: 99%

Evaluation of Interspecific Crossing Experiments in Facultatively Apomictic Blackberries (Rubus subgen. Rubus) Using DNA Fingerprinting

Nybom

2004

Hereditas

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A series of interspecific crossing experiments in Rubus was evaluated with DNA fingerprinting to assess the proportion of apomictic vs sexual seed set. A total of 71 seedlings and their putative parents were thus analyzed by hybridization of HaeIII‐digested DNA samples to a minisatellite DNA probe derived from the M13 phage. Of the offspring derived from non‐hybridogenous seed parents, only about 10% appear to emanate from sexual seed set. On the contrary, offspring derived from pollination of hybridogenous plants were in 6 cases out of 10 sexually derived. Pollen stainability with cotton blue was also investigated and could, though to a more limited extent, be used as an indicator of reproductive mode. Taxonomic treatment of Rubus and other apomictic plant groups would clearly benefit from more data on reproduction and dispersal, which may be obtained by DNA fingerprinting.Hilde Nybom, Balsgard‐Department of Horticultural Plant Breeding, Swedish University of Agricultural Sciences, Fjalkestadsvagen 123‐1, S‐291 94 Kristianstad, Sweden

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“…When an endosperm-balance requirement prevents hybridization, plant breeders can sometimes produce triploid hybrids by replacing one parent by its autotetraploid (Carputo et al 1999;Håkansson and Ellerström 1950;Lin 1984), and this has been referred to as halving or doubling the effective ploidy or endosperm-balance number (Brink and Cooper 1947a, b;Carputo et al 1999;Jennings et al 1967;Johnston et al 1980). Haig and Westoby's evolutionary model Westoby 1989, 1991) predicts that many genes of small effect would be involved, but Hawkes and Jackson (1992) found in Solanum that the success or total failure of a cross may be genotype-dependent, which would indicate that mutations of large effect can occur, which presumably either multiply the endosperm-balance number, or produce a nearly equivalent effect.…”

Section: Evolutionary Modelsmentioning

confidence: 99%

Evolution of gametophytic apomixis in flowering plants: an alternative model from Maloid Rosaceae

Talent

2009

Theory Biosci.

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Gametophytic apomixis, asexual reproduction involving megagametophytes, occurs in many flowering-plant families and as several variant mechanisms. Developmental destabilization of sexual reproduction as a result of hybridization and/or polyploidy appears to be a general trigger for its evolution, but the evidence is complicated by ploidy-level changes and hybridization occurring with facultative apomixis. The repeated origins of polyploid apomictic complexes in the palaeopolyploid Maloid Rosaceae suggest a new model of evolutionary transitions that may have wider applicability. Two conjectures are fundamental to this model: (1) that as previously suggested by Rutishauser, like many sexual flowering plants the polyploid apomicts require maternal-paternal balance in the second fertilization event that gives rise to the endosperm, and (2) that the observed variation in endosperm ploidy levels relates less to flexibility late in development than to the known variation in developmental origin of the megagametophyte between mechanisms loosely categorized as diplospory and apospory. The model suggests explanations for the relative frequencies of apospory and diplospory, and for the wide but incomplete associations of apospory with a pollination requirement (pseudogamy) and of diplospory with autonomous development of the endosperm. It is suggested that pollination from other taxa may provide some adaptive advantage to pseudogamous apospory.

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The role of the male parent in the reproduction of Rubus

Cited by 23 publications

References 13 publications

Some Genetic Factors Affecting Seedling Emergence in Raspberries

Some Genetic Factors Affecting Seedling Emergence in Raspberries

Evaluation of Interspecific Crossing Experiments in Facultatively Apomictic Blackberries (Rubus subgen. Rubus) Using DNA Fingerprinting

Evolution of gametophytic apomixis in flowering plants: an alternative model from Maloid Rosaceae

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