摘要
对以色列野生二粒小麦(母本)和光稃野燕麦(父本)远缘杂交亲本与后代的核型及进化关系进行了分析。结果表明:母本的染色体长度比为1.626,核型公式为2n=4x=28=18m(2SAT)+10sm(2SAT),核型为1A。父本的染色体长度比为2.526,核型公式为2n=6x=42=20m(2SAT)+22sm(4SAT),核型类型为2B。以色列野生二粒小麦和光稃野燕麦杂交后代0878株系的染色体数目为42,染色体长度比为1.802,核型公式为2n=6x=42=22m(2SAT)+20sm(2SAT),核型为2A。0878-1株系的染色体数目为42,染色体长度比为2.057,核型公式为2n=6x=42=38m+4sm(4SAT),核型为2B。由于光稃野燕麦遗传物质渗入到该杂交后代,获得了进化程度高于其母本的普通小麦型小麦新种质。
The karyotype and evolutional relationship of wild cromer wheat from Israel （female parent）, Arena fatua L. var. glabrata pat （male parent） and their offsprings were analyzed in the present study. The maternal chromosome length ratio was 1. 626, its karyotype formula was 2n =4x =28 = 18m （2SAT） ＋ 10sin （2SAT）, and belonged to the type＇IA. The paternal chromosome length ratio was 2. 526, its karyotype formula was 2n = 6x = 42 = 20m （2SAT） ＋ 22sin （4SAT）, and attributed to the type 2B. The chromosome number of the line 0878 was 42, its chromosome length ratio was 1. 802, its karyotype formula was 2n = 6x = 42 = 22m （2SAT） ＋ 20sm （2SAT）, and pertained to the type 2A. The chromosome number of the line 0878 - 1 was 42, its chromosome length ratio was 2. 057, and its karyotype formula was 2n =6x =42 =38m ＋4sm （4SAT）, classified to the type 2B. A new wheat germplasm, more evolutive than its female parent, was achieved due to chromatin introgression of A. fatua L. var. glabrata pat.
出处
《云南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第1期1-6,共6页
Journal of Yunnan Agricultural University:Natural Science
基金
国家自然科学基金(31160224)
贵州省农业攻关项目[黔科合NY字(2008)3017
黔科合带帽字(2009)5002]
关键词
野生二粒小麦
野燕麦
远缘杂交
核型
进化
Triticum dicoccoides
Avena fatua L.
wide cross
karyotype
evolution
