北方粳稻南繁过程中品质变化规律

Analysis on Quality Changes of Northern Japonica Rice during Winter Nursing in Hainan Island

为研究北方粳稻在南繁北育过程中的品质变化规律,以辽宁省主栽品种辽粳9号、辽星1号、辽星21和杂交粳稻骨干亲本C62、C418为试验材料,分析了各品种在沈阳、海南三亚及海南乐东种植时稻米品质指标变化。结果表明,垩白粒率及垩白度产地间差异不显著,而糙米率、精米率、整精米率、碱消值、胶稠度、直链淀粉含量、蛋白质含量、粒长及长宽比等不同产地间达到显著或极显著水平。表明水稻在不同生态区种植,品质指标可表现出较大变异性,且品种间变化趋势不同。在水稻南繁北育过程中,品质性状中垩白粒率及垩白度可在不同生态区进行协同选择,而其他米质指标应以北方当地育种区域的性状为主进行考察筛选。

In order to study the quality change rule of northern japonica rice during winter nursing in Hainan island, the quality indexes of Liaogeng 9, Liaoxing 1, Liaoxing 21 and the backbone restorer lines of hybrid japonica rice C62 and C418 were analyzed.The results showed that, the chalkiness rice rate and chalkiness degree were not significantly different between the producing areas,and the brown rice rate, milled rice rate, head rice rate, alkali elimination, viscosity, amylose content, protein content, grain length,grain length-width ratio and so on reached the significant or extremely significant level. When rice was planted in different ecological zones, the quality indexes showed great variability, and the variation trend of varieties was different, which showed the complexity of the quality performance of rice in breeding in southern and northern area. Therefore, for most quality traits of northern japonica rice, it is inadvisable to select in breeding in Hainan.