Nucellar embryony

Nucellar embryony
Most commercial citrus varieties produce mainly nucellar seedlings.

Nucellar embryony (notated Nu+) is a form of seed reproduction that occurs in certain plant species, including many citrus varieties. During the development of seeds from plants that possess this genetic trait, the nucellar tissue which surrounds the megagametophyte can produce additional embryos (polyembryony) which are genetically identical to the parent plant. These nucellar seedlings are essentially clones of the parent. By contrast, zygotic seedlings are sexually produced and inherit genetic material from both parents.

Nucellar embryony is important to the citrus industry, as it allows for the production of uniform rootstock which yields consistent results in fruit production. However, this trait can interfere with progress in cross-breeding; most commercial scion varieties produce mainly nucellar seedlings which do not inherit any of the traits of the "father" plant.

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  • nucellar embryony — nucellar embryony. См. нуцеллярная эмбриония. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • nuclear embryony — nuclear embryony. = nucellar embryony (см.). (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Asexual reproduction — in liverworts: a caducous phylloid germinating Asexual reproduction is a mode of reproduction by which offspring arise from a single parent, and inherit the genes of that parent only, it is reproduction which does not involve meiosis, ploidy… …   Wikipedia

  • Apomixis — Not to be confused with automixis or autogamy. This article deals almost exclusively with plants. For similar processes in animals and Oomycetes, see Parthenogenesis. In botany, apomixis was defined by Winkler as replacement of the normal… …   Wikipedia

  • Nu — or NU may refer to: Nu (letter), a letter in the Greek alphabet: lowercase ν, uppercase Ν Nu (kana), the Japanese characters ぬ and ヌ Nu (mythology), the male form of the Egyptian goddess Naunet Nu (Chrono Trigger), a fictional species from the… …   Wikipedia

  • Ovule — This article is about the plant structure. For animal ovules, see ovum. Micropyle and Ovular redirect here. For the structure in animals, see Micropyle (zoology). For the shape, see oval. Location of ovules inside a Helleborus foetidus flower… …   Wikipedia

  • нуцеллярная эмбриония — nucellar (nuclear) embryony нуцеллярная эмбриония. Процесс развития нуцеллюса <nucellus>, в котором происходит дифференцировка мегаспосроцита и последующие процессы образования семени. (Источник: «Англо русский толковый словарь генетических …   Молекулярная биология и генетика. Толковый словарь.

  • нуцеллярная эмбриония — Процесс развития нуцеллюса, в котором происходит дифференцировка мегаспосроцита и последующие процессы образования семени. [Арефьев В.А., Лисовенко Л.А. Англо русский толковый словарь генетических терминов 1995 407с.] Тематики генетика EN… …   Справочник технического переводчика

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