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  • Investigation on the factors leading to infertility in the cross between Dendranthema lavandulifolium and D. grandiflorum 'Jinling Huangyu'.

    Author(s) : Sun ChunQingChen FaDiFang WeiMinLiu ZhaoLeiHou XiLinTeng NianJun

    Author Affiliation : College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China.

    Author Email : njteng@njau.edu.cn

    Journal article : Acta Horticulturae Sinica 2009 Vol.36 No.9 pp.1333-1338 ref.19

    Abstract : Seeds are seldom obtained in the crossescrossesSubject Category: Miscellaneous
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    between chrysanthemum cultivars and diploid wild species in Dendranthema, which seriously influences utilization of excellent genes from those wild species. In the present study, with an aim to reveal the factors leading to infertility in the crosses between chrysanthemum cultivars and wild species, we carried out the interspecific hybridizationinterspecific hybridizationSubject Category: Miscellaneous
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    between D. grandiflorum 'Jinling Huangyu' and D. lavandulifolium, tested pollen viabilityviabilitySubject Category: Properties
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    of male parent, examined germination behavior of pollen grains on the stigmas after pollination, and observed embryo development. It was found that pollen viability of D. lavandulifolium was 11.2% just before pollination, no pollen grains germinated on the stigmas during 4 h after pollination and only 7. pollen grains germinated on each stigmastigmaSubject Category: Anatomical and Morphological Structures
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    at 8 h after pollination. At 12 h after pollination, the number reached the highest value, 16.1. At 24 h and 48 h after pollination, the number was quickly decreased to 3.2 and 2.4, respectively. In addition, most pollen grains germinated abnormally on the stigmas and many pollen tubes stayed on the stigmas' surface and failed to enter ovaries. At 8 d after pollination, normal globular embryos were observed only in 12.0% ovaries. Thereafter, only abnormal embryos were observed in some ovaries, and as a consequence, no seeds were obtained in the cross. However, seed setseed setSubject Category: Natural Processes
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    of female parent under open pollinationopen pollinationSubject Category: Miscellaneous
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    conditions was as high as 42.3%. These results suggest that both pre- and post-fertilization barriers, i. e. only a few germinated pollen grains on the stigmas and abnormal germination of most pollen grains before fertilization as well as degeneration of a large number of embryos after fertilization, may be the main factors resulting in infertility in the cross.

    ISSN : 0513-353X

    URL : http://yyxb.periodicals.net.cn/defaul...

    Record Number : 20103058076

    Publisher : Editorial Office of Acta Horticulturae Sinica

    Location of publication : Beijing

    Country of publication : China

    Language of text : Chinese

    Language of summary : English

    Indexing terms for this abstract:

    Organism descriptor(s) : ChrysanthemumchrysanthemumSubject Category: Organism Names
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    , Chrysanthemum lavandulifoliumchrysanthemum lavandulifoliumSubject Category: Organism Names
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    , Chrysanthemum morifoliumchrysanthemum morifoliumSubject Category: Organism Names
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    Descriptor(s) : abnormal developmentabnormal developmentSubject Category: Diseases, Disorders, and Symptoms
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    , chrysanthemumschrysanthemumsSubject Category: Commodities and Products
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    , crossescrossesSubject Category: Miscellaneous
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    , embryogenesisembryogenesisSubject Category: Miscellaneous
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    , gynoeciumgynoeciumSubject Category: Anatomical and Morphological Structures
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    , hybridshybridsSubject Category: Organism Groups
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    , interspecific hybridizationinterspecific hybridizationSubject Category: Miscellaneous
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    , open pollinationopen pollinationSubject Category: Miscellaneous
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    , plant embryosplant embryosSubject Category: Anatomical and Morphological Structures
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    , pollenpollenSubject Category: Anatomical and Morphological Structures
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    , pollen germinationpollen germinationSubject Category: Natural Processes
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    , seed setseed setSubject Category: Natural Processes
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    , sterilitysterilitySubject Category: Miscellaneous
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    , stigmastigmaSubject Category: Anatomical and Morphological Structures
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    , viabilityviabilitySubject Category: Properties
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    Identifier(s) : Dendranthema morifolium

    Broader term(s) : AsteraceaeasteraceaeSubject Category: Organism Names
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    , AsteralesasteralesSubject Category: Organism Names
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    , eudicotseudicotsSubject Category: Organism Names
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    , angiospermsangiospermsSubject Category: Organism Names
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    , SpermatophytaspermatophytaSubject Category: Organism Names
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    , plantsplantsSubject Category: Organism Names
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    , eukaryoteseukaryotesSubject Category: Organism Names
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    , ChrysanthemumchrysanthemumSubject Category: Organism Names
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