不同环境下水稻对受体植物化感作用的动态遗传研究-中国科技论文在线.PDF

第3O卷 第4期 作 物 学 报 Vo1．30，No．4 2004年4月 348～353页 ACTA AGRONOMICA SINICA Apr．，2004 不同环境下水稻对受体植物化感作用的动态遗传研究 林文雄 何华勤 董章杭 沈荔花 郭玉春 梁义元 陈芳育 梁康迳 (福建农林大学，福建福州3500o2) 摘 要 采用包括基因型与环境互作的数量性状加性一显性发育遗传模型，研究了按双列杂交设计(5×6)／2配制的1套 包括亲本、F。2个世代的水稻遗传材料对受体植物莴苣幼苗根长化感作用的动态遗传及与环境互作效应。遗传方差分 析表明，控制水稻不同叶龄期化感作用的加性效应与显性效应呈交替表达趋势，叶龄在7叶期受加性效应控制，在3叶 期和6叶期由显性效应控制，在5叶期和8叶期加性和显性效应共同作用，以显性效应为主。这解释了在化感作用研究 过程中发现的间断性表型表现的遗传原因。普通狭义遗传率随叶龄增大趋于下降。基因型与环境互作效应对水稻化感 作用的影响较大，据此讨论了如何结合应用水稻化感作用的加性和显性遗传效应，开展化感抗草性水稻品种选育及其化 感作用水稻杂种优势的利用研究。 ‘ 关键词 水稻；化感作用；动态遗传；基因型与环境互作；遗传方差 中圈分类号：S511 Study on Developmental Inheritance of Allelopathy in Rice(Oryza sativa L．)under Di rent Environment LIN Wen-Xiong，HE Hua-Qin，DONG Zhang-Hang，SHEN Li-Hua，GUO Yu-Chun，LIANG Yi-Yuan，CHEN Fang-Yu， LIANG Kang-Jing (Fwian Agriculture and Forestry University，Fozlwu 350002，Fujian，China) Abstract 5 rice varieties with different allelopathic potential were employed in a diallel CROSS(5×6)／2．Developmental inheritance of rice allelopathy on the root length of receiver plant lettuce(Lactuca sativa L．)and its genotypo×environ· ment effects were anMy~d by using additive-dominance genetic models．，I’he results showed that additive and dominant ef· fect were found alternatively during 3— 8-leaf stage of seedling．Additive effect was dominative at 7-leaf stage．and d0Illi· nance effect appeared to play the most important role at 3-leaf stage and 6-leaf stage，but the two effects were eqnany im· portant at 5-and 8-leaf stage．Heritability analysis indicated that日裔decreased as leaf stage increasing．Rice allelopathy was significantly affected by genotypo×environment(GE)interaction．Accordingly，it w砸further discussed how to inte· gratedly Use the additive and domin