摘要
以4个糯玉米品种(垦粘1号,苏玉糯2号,苏玉糯5号和渝糯7号)为材料,研究了播期对其籽粒产量与淀粉热力学特性的影响。结果表明:各品种在5月15日播种时受飞虱危害不能正常成熟,能正常成熟时籽粒产量均在4月15日播种时最低,垦粘1号和苏玉糯2号在6月15日播种时最高,苏玉糯5号和渝糯7号则在7月15日播种时最高。播期对淀粉热力学特征值的影响远高于品种间差异(回生值除外)。总体上,回生值受播期影响较小,热焓值和峰值指数以3月15日播种时最高,6月15日播种时最低,起始温度、峰值温度和终值温度以4月15日播种时最高,7月15日播种时最低,糊化范围4月15日播种时最低,6月15日播种时最高。不同品种籽粒产量和淀粉热力学特征值对播期的响应有显著基因型差异。碘结合力播期处理的变化趋势与转变温度3个指标相似。相关分析表明,碘结合力与起始温度、峰值温度、终值温度和峰值指数显著正相关,与糊化范围显著负相关。
The effects of different planting dates on waxy maize grain yield and starch thermal property were studied using 4 varieties （ Kennianl, Suyunuo2, Suyunuo5, and Suyunuo7 ） as materials. The results observed that the waxy maize grain yield was affected by planting dates,the varities planted at May 15th couldn＇t growth as it were harmed by plant hoppers, and the grain yield was lowest for 4 varieties at April 15 planting among the other treat- ments, and it was highest for Kennianl and Suyunuo2 at June 15th planting, for Suyunuo5 and ~unuo7 at July 15th planting,respectively. The thermal characteristics except retrogradation percentage were mainly affected by planting dates than genotype. In general, the percentage of retrogradation were similar among four planting dates, the gelatiniza- tion enthalpy and peak height index were higher at March 15th planting and lower at June 15 planting,the transition temperatures （onset- ,peak- ,and conclusion temperature） were higher at April 15 and lower at July 15 planting, while the gelatinization range were higher at April 15th and lower at June 15th planting. The genotypic differences of grain yield and starch thermal characteristics response to planting dates were observed among 4 varieties The changing tendency of iodine binding capacity among different planting dates were similar to the three transition temperatures. The correlation analysis demonstrate that the iodine binding capacity was positively correlated to onset -, peak -, con- clusion temperature, and peak high index, while it was negatively correlated to gelatinization range.
出处
《中国粮油学报》
EI
CAS
CSCD
北大核心
2012年第8期11-15,共5页
Journal of the Chinese Cereals and Oils Association
基金
国家自然科学基金(30971731、31000684)
江苏省高校自然科学基金(11KJB210006)
江苏省作物栽培生理重点实验室开放课题(K100010)
关键词
糯玉米
播期
籽粒产量
热力学特性
碘结合力
waxy maize, planting date, grain yield, thermal property, Iodine binding capacity
