作物学报 ›› 2013, Vol. 39 ›› Issue (08): 1409-1415.doi: 10.3724/SP.J.1006.2013.01409
朱小燕,徐芳芳,桑贤春,蒋钰东,代高猛,王楠,张长伟,何光华*
ZHU Xiao-Yan,XU Fang-Fang,SANG Xian-Chun,JIANG Yu-Dong,WANG Nan,ZHANG Chang-Wei,HE Guang-Hua*
摘要:
叶绿素是植物生长发育必不可缺的元件。叶色突变体的发掘与研究在叶绿体发育、叶绿素代谢、光合作用等研究中具有重要作用。利用化学诱变剂EMS诱变水稻(Oryza sativa L.)籼型恢复系缙恢10号,从其后代中筛选出一份突变性状稳定遗传的叶脉白化突变体wpsm (white primary and secondary midrib)。与野生型相比,该突变体苗期表现正常,孕穗后期剑叶、倒二叶、倒三叶整张叶片的主叶脉和次级叶脉白化,叶肉细胞无显著变化,该性状一直持续到成熟期。抽穗期突变体wpsm的光合色素含量极显著低于野生型,净光合速率(Pn)及表观电子传递速率(ETR)极显著降低,株高、每穗实粒数、千粒重、结实率等农艺性状均显著降低。该突变性状受一对隐性核基因调控,利用892株西农1A/wpsm的F2隐性定位群体,将该基因定位在第6染色体上引物InDel 10与InDel 4之间,遗传距离分别为0.06 cM和0.12 cM,物理距离约为56 kb。本研究为WPSM基因的克隆和功能研究奠定了基础。
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