两优培九稻米淀粉黏滞性(RVA谱)的纬度地域和播期变化特征  

Variation of Starch Viscosity Characteristics (RVA Profile) of Hybrid Rice Liangyoupeijiu as Affected by Latitude and Seeding Time

作　　者：沈新平[1] 顾丽[1] 沈小燕[1] 龚丽萍[1] 张洪程[1] 

机构地区：[1]扬州大学江苏省作物遗传生理重点实验室,江苏扬州225009

出　　处：《中国水稻科学》2007年第1期59-64,共6页Chinese Journal of Rice Science

基　　金：国家粮食丰产科技工程资助项目(0044BA520A)。

摘　　要：在江苏4个稻作区的5个不同纬度点(纬度范围为31.3°N^34.7°N),设置了5个播期处理,研究了优质高产的两系杂交中籼稻两优培九的稻米RVA谱变化特征。两优培九稻米RVA谱易受环境影响,该品种最佳的稻米RVA谱主要出现在纬度点32.4°N及以南地区,北移种植则导致RVA谱品质下降,即峰值黏度下降,消减值、糊化温度增加。RVA谱随播期的推迟呈变劣的趋势。结实期较高的平均温度可显著增加峰值黏度、降低消减值,因此两优培九以早播栽培为佳。By setting up five seeding-time treatments at five different latitude zones in four Jiangsu rice growing regions（the latitude ranges from 31.3° N to 34.7° N）, the RVA profile variation characteristic of the middle maturity two-line hybrid rice Liangyoupeijiu with good quality and high yield was studied. The RVA profile of Liangyoupeijiu was easily influenced by environmental factors. It was noted that at a latitude less than 32.4°, the variety possesed the best RVA profile, such as higher peak viscosity and lower setback value and pasting temperature. Moreover, from the seeding-time experiments, it was found that the RVA profile of Liangyoupeijiu worsened as the seeding was POStponed, and the peaking viscosity would markedly in- crease and setback value would decrease with the increase of average temperature during the seeding period. Therefore, Liangyoupeijiu should be planted as early as possible for imoroving its grain aualitv.

关 键 词：稻米 淀粉黏滞性 纬度 播种期 结实期 平均温度 

分 类 号：S511.21[农业科学—作物学]