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作 者:刘炜[1] 吴光耀[1] 吴相钰[1] 林志珊[2] 杨志勇[2] 陈孝[2]
机构地区:[1]北京大学生命科学学院,北京100871 [2]中国农业科学院作物育种栽培研究所,北京100081
出 处:《Acta Botanica Sinica》1996年第8期617-625,共9页Acta Botanica Sinica(植物学报:英文版)
基 金:国家自然科学基金;国家教委博士点专项基金资助项目 ;农业部植物生理生化重点开放实验室资助
摘 要:NC4号小麦是一高产、抗逆的核质杂种 ,它是由山羊草 (Aegilops squarrosa,♀ )与小麦 (Triticumaestivum, )杂交 ,并多次回交和筛选而获得。测定了 NC4号及其父本的 Rubisco rbc L序列 ,证明 NC4号的 rbc L是由山羊草基因编码。对核质杂种及其亲本 Rubisco的羧化和加氧活性测定表明 ,杂种的羧化 /加氧活性比低于母本山羊草 ,高于父本小麦。rbc L序列测定表明 ,NC4号与父本小麦的 rbc L 有 3个核苷酸的差异 ,即在其氨基酸序列上第 14、86和 95位有 3个残基不同。Nucleo cytoplasmic hybrid wheat NC4 is resistent to a number of stresses and produces high yield. It was obtained by crossing Aegilops squarrosa(♀) with Triticum aestivum(), and several back crossings. The rbcLs(the gene of large subunit of Rubisco ( ribulose 1,5 bisphosphate carboxylase/oxygenase )) cloned from NC4 and T.aestivum have been sequenced, and the result showed that the rbcL of NC4 was originated from Ae. squarrosa. The ratio of carboxylase activity to oxygenase activity, V CO 2/V O 2, of hybrid NC4 was lower than that of Ae. squarrosa, but higher than that of T. aestivum. This difference may be accounted for the higher yield of NC4 than that of T. aestivum. Sequence analysis showed that three nucleotides in the rbcL of NC4 which were different from those of T. aestivum, corresponded to the No 14, 86 and 95 amino acid residues of rbcL.
关 键 词:RUBISCO 小麦 核质杂种小麦 基因结构 功能
分 类 号:S512.103.2[农业科学—作物学]
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