农学小麦群体发育特性的研究················································……许昌惑等(1湖北四稻的回顾和展望······················································……胡仲紫(l水稻对白叶枯病抗性的研究·············································……谢岳峰等(l棉花生长后期进行种间杂交胚珠离体培养初报·····················……刘承智等(l…