摘要
以籽粒充实程度一好一差两个亚种间杂交稻及其亲本为材料 ,观察分析了两组合根系特征及其与籽粒充实程度的关系。结果如下 :亚种间杂交稻齐穗期上、下层根优势较强 ;形态方面 ,表现为根干重、根系总吸收面积、活跃吸收面积及不定根上一次及二次分枝根的数量等指标显著高于亲本和对照 ;生理方面 ,发根力强 ,伤流强度大 ,氨基酸合成量多 ,齐穗期根系氧化力高 ;在各形态生理二级参数中 ,齐穗期的根系活性总量 /库容、结实中期根系活性总量 /库容以及上层根干重 /地上部干重等与籽粒充实度间存在显著正相关关系。
Two typical Interspecific Hybrid Rice Combinations (IHRCs) were studied for root characteristics and the relation between root activity and grain plumpness, the results indicated that: Compared with control and their parents, the IHRCs have such heterosis as dry weight of root, total & active absorption area in both upper and lower roots, quantity of rootlets, bleeding sap and α-NA oxidation ability; The variation of root activity had significant effect on grain plumpness.
出处
《作物学报》
CAS
CSCD
北大核心
2003年第2期230-235,共6页
Acta Agronomica Sinica
基金
国家自然科学基金 ( 39870 46 )资助项目
关键词
亚种间杂交稻
根系
生理特征
籽粒充实度
Interspecific hybrid rice
Root characteristics
Grain plumpness
