| 释义 |
speltoid, a. and n. Bot.|ˈspɛltɔɪd|
[a. G. speltoid (H. Nilsson-Ehle 1917, in Botaniska Notiser 305), f. spelt: see spelt n.1 and -oid.]
A. adj. Of a wheat: resembling or having certain characteristics of spelt.
B. n. A speltoid wheat.
1920Hereditas I. 116 A distinctive character of these speltoids..is the short outer glumes, abruptly cut off at the top as in Triticum spelta... Speltoid heterozygotes are also characterized by longer straws and longer and more lax spikes than the mother sort. 1932Proc. 6th Internat. Congr. Genetics I. 286 Speltoid and dwarf types..are found in the progeny of treated plants of Triticum vulgare. 1939Sansome & Philp Recent Adv. Plant Genetics vii. 212 The speltoids differ from the parental type in having lax ears, thick keeled glumes which can only be pulled away from the grain with difficulty, and by the presence of awns. 1975Proc. R. Soc. B. CLXXXVIII. 149 Reasonably uniform lines were available for test crosses with vulgare and speltoid tester stocks. Ibid. 156 Spelta and speltoid cannot be distinguished phenotypically... The low frequency of defectives in F2's with base-sterile speltoids indicates a high degree of buffering by the polygenic system.
Hence ˈspeltoidy, speltoid character.
1944Genetics XXIX. 233 Speltoidy (so called because of the resemblance to T. spelta) has been shown..frequently to be due to the effects of a particular monosome. 1958Nature 28 Jan. 1813/1 Okamato..has shown that chromosome IX is in the A genome, and has thus reduced the historical importance of speltoidy and compactoidy. |