检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:瞿朋艳 李耀华[1] 高捷[1] 丁晓雨[1] 涂佳璐 王国强[1] 刘朝显[1] 王久光[1] 刘志斋[1]
机构地区:[1]西南大学农学与生物科技学院,重庆400715
出 处:《作物杂志》2014年第4期48-52,共5页Crops
基 金:重庆市"十二五"玉米攻关项目(cstc2012ggC80004);西南大学国家级大学生创新训练项目(2014106350421);教育部新教师基金项目(20111821200011)
摘 要:分子标记可以作为常规玉米育种的有益辅助,提高育种效率,尤其是针对基于隐性纯合基因的甜质玉米杂交育种。以自育的22份甜玉米自交系为材料,选取玉米基因组数据库中收录的基于shrunken2 ( sh2 ), brittle endosperm2 ( bt2 ), amylose extender 1 ( ae 1 ), sugary2 ( su2 ), shrunkenl ( sh 1 ), miniature seed 1 ( mn 1 ) 和 dull endosperm 1 ( du 1 ) 等7个甜质基因开发的12个基因内标记,对其进行分子鉴定,在此基础上,结合这些材料可溶性糖含量的测定,明确22份甜质自交系的甜质类型。测定结果表明,在乳熟期,22份甜质自交系子粒可溶性糖含量为18.83%~25.58%,均表现为超甜类型。分子鉴定结果则显示,22份甜自交系在CL1742(ae1)、CL1800 ( du1 ). CL1139 ( mn1 ). CL1470 ( sh2 ). SOG 1205 ( bt2 ), SOG 0157 ( sh 1 ) 与 phi 044 ( sh 1 )等7个标记上的等位变异与普通自交系一致,而IDP202(su2)、IDP584(su2)、Bt2_353(bt2)与phi028(sh1)等4个标记只在部分甜质自交系中检测到缺失,phi033(sh1)则在14份甜质自交系中检测到甜质特异性等位变异,在另8份材料上检测到缺失,表明本研究的甜质自交系主要表现为sh1甜质基因控制的超甜型。Molecular marker can be used as an effective assistant in maize breeding, especially in sweet corn breeding that fully focused on the recessive homozygous sweet-related genes. 22 sweet corn inbred lines were genotyped with 12 molecular markers developed via 7 sweet-related genes, i. e. shrunken2 (sh2), brittle endosperm2 (bt2) , amylose extender 1 ( ae 1 ) , sugary2 ( su2 ) , shrunken 1 ( sh 1 ) , miniature seed 1 ( mn 1 ) , and dull endosperm 1 (du 1 ). In addition, the soluble sugar content of these lines was also determined at 20 days after pollination(DAP). Resuhs showed that the soluble sugar content of these 22 sweet corn inbred lines at 20 DAP ranged from 18.83% to 25.58%, suggested that these materials were all super sweet inbreds. Results from the genotyping indicated that these lines possessed dominant homozygous alleles at 7 loci of CL 1742 (ae 1 ) , CL 1800 ( du 1 ), CL 1139 ( mn 1 ), CL 1470 ( sh 2 ), SOG 1205 ( bt 2 ), SOG 0157 ( sh 1 ), and phi 044 ( sh 1 ). Genotyped with 4 loci of IDP202 ( su2 ), IDP58d ( su2 ), Bt2 _353 ( bt2 ), and phi028 ( shi1 ), 16 - 20 sweet lines also exhibited dominant homozygous alleles,while no products were detected within the rest lines. Fingerprinted with the locus of phi033 (sh1), 14 sweet lines exhibited recessive homozygous alleles, and no bands were detected within the rest 8 lines, which suggested that all these super sweet lines were mainly controlled by sh 1.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.43