单词 | homogamous |
释义 | homogamousadj. Botany. a. Having all the florets (of a spikelet or capitulum) hermaphrodite, or all of the same sex: said of certain grasses and composites: opposed to heterogamous adj. 1(b), 1(c). ΘΚΠ the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [adjective] > having or relating to parts > of or having stamens or pistils > having both stamens and pistils or hermaphrodite perfect1706 hermaphrodite1769 unisexual1795 united1807 unisex1810 homogamous1842 teleianthous1860 1842 W. T. Brande Dict. Sci., Lit. & Art 560/2. 1850 W. J. Hooker & Arnott Brit. Flora (ed. 6) 229 Heads homogamous (all the florets perfect and fertile). 1872 D. Oliver Lessons Elem. Bot. (new ed.) ii. 196 If all the florets of a flower-head..be perfect, the flower~heads are homogamous (Dandelion). b. Applied to flowers in which the stamens and pistils ripen together. ΘΚΠ the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [adjective] > having or relating to parts > of or having stamens or pistils > having particular order of maturation homogamous1854 protandrous1870 protogynous1870 synacmic1870 proterandrous1872 proterogynous1875 synanthetic1909 1854 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Homogamius, Homogamus,..applied by Sprengel (Homogamia) to the case in which the male and female organs of a plant arrive together at maturity: homogamious: homogamous. 1881 H. Müller in Nature 10 Feb. 337/1 The hermaphrodite flowers are homogamous and short-styled, like Syringa vulgaris. c. Evolution. Of or pertaining to homogamy (sense b). ΘΚΠ the world > life > biology > biological processes > genetic activity > heredity or hereditary descent > [adjective] > descent from common ancestor > inbreeding homogamous1903 homogamic1907 isologous1955 1903 Biometrika 2 481 The whole range of effect from pure random matings to perfectly homogamous unions within a population is almost but not quite as important as the difference between self and cross fertilization in plants. Derivatives hoˈmogamy n. (a) homogamous condition; fertilization of a flower by its own pollen or by that of another flower on the same plant (cf. b above); (b) Evolution preferential breeding between individuals similar in some characteristic; inbreeding. ΘΚΠ the world > life > biology > biological processes > genetic activity > heredity or hereditary descent > [noun] > descent from common ancestor > inbreeding home breeding1756 in-breedingc1842 homogamy1874 intermarriage1882 the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > flower or flowering plant > [noun] > pollination > self-fertilization self-fertilization1850 self-fertility1865 homogamy1874 autogamy1877 selfing1907 self-compatibility1916 self-pollinating1930 1874 R. Brown Man. Bot. 432 Sprengel's term Homogamy..has a prior claim over Bennett's Synacmy. 1897 G. J. Romanes Darwin & After III. i. 5 For the sake..of securing more descriptive terms, I will coin the words Apogamy and Homogamy... Homogamy..answers to discriminate isolation, or segregate breeding: only individuals belonging to the same variety or kind are allowed to propagate. 1903 Biometrika 2 481 If the male class of a given character tends to mate with a female class with generally like character, we have a tendency to homogamy. 1947 Evolution I. 270/2 The concept of homogamy or associative mating states that within a population the most similar individuals will mate with each other. 1970 T. Dobzhansky Genetics Evol. Process iv. 100 There may, however, be assortative mating, such as some preference for mating of like (homogamy). homoˈgamic adj. = c. ΘΚΠ the world > life > biology > biological processes > genetic activity > heredity or hereditary descent > [adjective] > descent from common ancestor > inbreeding homogamous1903 homogamic1907 isologous1955 1907 Fabian News XVII. 55/2 Professor Pearson's theory of homogamic mating. 1970 T. Dobzhansky Genetics Evol. Process x. 328 If eggs of the two species of sea urchins..are exposed to mixtures of sperm of both species, homogamic fertilizations greatly outnumber heterogamic ones. This entry has not yet been fully updated (first published 1899; most recently modified version published online September 2018). < adj.1842 |
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