当木原(95)首次通过核置换回交,将普通小麦awm核基因导入尾状山 草( A e caudata}細胞质产生小麦雄性不育来这一发现为利用小麦杂种优势带来了希望, 但由于尾状山羊草细胞质除能诱导雄性不育外,也带来许多有害的副作用,使其难用于 实际生产。当啊s和R9%2报道培育成功提型小麦雄性不育系后,杂种小麦的研 究与利用才广泛开展起来
A Theory of Customary International Law Jackl. Goldsmithand eric A. Posner*e Customary international law (\CIL\)is one of two primary forms of international law, the other being the treaty. CIL is typically defined as a\customary practice of states followed from a sense of legal obligation. \1 Conventional wisdom views CiL as a unitary phenomenon that pervades
Yale law School Public Law and Legal Theory Research Paper No 52 Center for Law, Economics and Public policy Research Paper No 275 University of virginia School of Law Law and economics research Paper series Research Paper No. 03-1 Contract Theory and the limits of Contract Law Alan Schwartz and robert e. scott