Position: Home > Articles > CYTOLOGY, FERTILITY AND MORPHOLOGY OF DDRR TETRAPLOID TRITICALE
Journal of Sichuan Agricultural University
1992
(2)
340-347
四倍体小黑麦的细胞学研究
作 者：
李仕贵;林文君;蒋华仁
单 位：
四川农业大学
关键词：
细胞学[45BA];染色体[45RA 45CF];减数分裂[45BD];四倍体小黑麦;;结实率
摘 要：
本研究对四体倍小黑麦(2n=4x=28,DDRR)的细胞学和农艺性状进行了系统分析,结果表明,四倍体小黑麦减数分裂异常,在中期、后期和四分体期可观察到较多的单价体、落后染色体和微核,表现出强烈的细胞学不稳定性,同时发现植株的单价体数和结实率呈显著的负相关,D与R染色体组无部份同源染色体配对行为。在四倍体小黑麦群体中,非整倍体植株的频率较低,农艺性状方面,与结实率有关的性状如穗粒数等比双亲差,小穗数、小花数等性状优于双亲,且出现了双亲都不具有的新性状如穗轴较坚韧。四倍体小黑麦不易与普通小麦杂交,ph基因有促进杂交的作用。
译 名：
CYTOLOGY, FERTILITY AND MORPHOLOGY OF DDRR TETRAPLOID TRITICALE
作 者：
Li Shigui et al (Sichan Agricultural University, Yaan, Sichan, China) Izip code: 625014
关键词：
SUBJECT WORDS: CYTOLOGY; CHROMOSOME (S); MEIOSIS. FREE WORDS: TETRAPLOID; FERTILIZATION.
摘 要：
Among 12 plants of tetraploid triticale analyzed at meiosis, the amphidiploid is chromosomally much more instable than its parents, chiasmata frequenceis of chromsomes at meiosis ranged from 1.10 to 1.35 and the frequency of cells without univalents ranged from o to 26％ in tetraploid triticale. Average aneuploid frequency in a sample of 37 plants was 0.00％ The amphidiploid was much more vigorous and much less fertile than its parents, and the averge fertilization rate was 15.3％, The morpholology of the amphiploid in comparison to its parents was described. The use of tetraploid triticale in wheat or trticale improvement was suggested.
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