直立与弯曲穗型水稻穗上不同部位粒形分布特征  

Comparison with the Grain Shapes at Different Positions Between Erect Rice Panicle and Curved Rice Panicle Cultivars

作　　者：金峰[1] 陈书强[1] 李培培[2] 袁莹[2] 徐正进[1] 陈温福[1] 

机构地区：[1]沈阳农业大学水稻研究所,辽宁省北方粳稻育种重点试验室,农业部作物生理生态与遗传育种重点开放试验室,沈阳110161 [2]辽宁省铁岭市科学技术协会,辽宁铁岭112000

出　　处：《沈阳农业大学学报》2008年第3期279-284,共6页Journal of Shenyang Agricultural University

基　　金：国家自然科学基金项目(30370866);教育部高等学校博士点基金项目(20050157001)

摘　　要：以直立穗型和弯曲穗型水稻品种为材料,研究了稻谷粒形在穗上不同部位和不同粒位籽粒间的分布及其差异。结果表明:弯曲穗型品种整穗籽粒的粒长、粒宽、长宽比以及长厚比均高于直立穗型品种,其中粒长差异达到显著水平。在稻穗的同一部位,两种穗型品种一次枝梗籽粒的粒长、粒宽、长宽比、长厚比均高于二次枝梗;且在一个枝梗上稻米的粒长、长厚比与开花早晚有一定联系,但又不严格按照开花的顺序,而会因品种和栽培条件的不同发生变化。粒宽、长宽比则与颖花的开花时间无必然的联系。穗型对不同部位、不同粒位籽粒粒长、粒宽、长宽比以及长厚比在整穗上的分布与排序并没有明显的影响。因此可以通过选择来改良直立穗型品种的籽粒的外观品质。Differences in grain shape among the grains at different positions between the cultivars with erect panicle type and the cultivars with curved panicle type were studied. The objective was to investigate the difference of the grain shape in different grains and different grain positions in cuhivars with different panicle type. The results showed that the length of grains, width of grains, length-width ratio of grains and length-thick ratio of grain of the curved-panicle cuhivars were greater than that with erect panicle type, of which the length of grains reached significant level. Generally, at the same positions of the panicle, the length, width, length-width ratio and length-thick ratio of grains on the primary branches were greater than the grains on the secondary branches in different cuhivars with different panicle types. On the one branch, the length and length-thick ratio of grain have connected with the order of blossom, but they were not according to it strictly and varied with the cuhivars or planting condition. There have no connected between width, length-width ratio of grains and the time of blossom. There was no significant correlation between the panicle type and grains sequence. So the rice appearance quality of the cuhivars with erect panicle type could be improved through selection.

关 键 词：水稻 穗型 粒位 粒形 一次枝梗 二次枝梗 稻米品质 

分 类 号：S511[农业科学—作物学] Q141[生物学—生态学]