CAJ | 학술논문

以汕优63为对照,对超大穗型水稻父本 R1126及所配4个组合产量、籽粒灌浆充实特性和穗颈输导组织特征进行分析.结果表明,R1126所配的杂交组合产量比汕优63高7．43％~24．23％,每穗总粒数和实粒数的增加是其增产的主要途径.R1126所配杂交组合穗颈粗度、茎壁面积、茎壁面积与节间横切面积之比、维管束数目、维管束总面积、韧皮部总面积、韧皮部总面积与维管束总面积之比和输导组织活性均高于汕优63,其颖花数/维管束面积、颖花数/韧皮部面积、总库容/维管束面积、总库容/韧皮部面积、实粒重/维管束面积、实粒重/韧皮部面积均低于汕优63,有机质向穗部的转运也较通畅,强、弱势粒籽粒灌浆起始生长势(R 0)大、最大灌浆速率(GR max )和平均灌浆速率(GR mean )高,达到最大灌浆速率的时间(T max )早,活跃灌浆期(D )和有效灌浆期(T 99)短,籽粒灌浆迅速,动态合理,强、弱势粒(SG、IG)生长终值量(A )差值小,籽粒充实良好.相关分析表明,颖花数/韧皮部面积、总库容/韧皮部面积、实粒重/韧皮部面积与强、弱势粒的 GR max 和 GR mean 负相关,与谷粒充实率负相关,与 D 、T 99和 T max 正相关；输导组织活性与强、弱势粒 GR max 和 GR mean 显著或极显著正相关,与谷粒充实率正相关,与 D 、T 99和 T max 正相关.穗颈输导组织与籽粒灌浆结实关系密切,改善穗颈输导组织特性有利于籽粒灌浆结实.
이산우63위대조,대초대수형수도부본 R1126급소배4개조합산량、자립관장충실특성화수경수도조직특정진행분석.결과표명,R1126소배적잡교조합산량비산우63고7．43％~24．23％,매수총립수화실립수적증가시기증산적주요도경.R1126소배잡교조합수경조도、경벽면적、경벽면적여절간횡절면적지비、유관속수목、유관속총면적、인피부총면적、인피부총면적여유관속총면적지비화수도조직활성균고우산우63,기영화수/유관속면적、영화수/인피부면적、총고용/유관속면적、총고용/인피부면적、실립중/유관속면적、실립중/인피부면적균저우산우63,유궤질향수부적전운야교통창,강、약세립자립관장기시생장세(R 0)대、최대관장속솔(GR max )화평균관장속솔(GR mean )고,체도최대관장속솔적시간(T max )조,활약관장기(D )화유효관장기(T 99)단,자립관장신속,동태합리,강、약세립(SG、IG)생장종치량(A )차치소,자립충실량호.상관분석표명,영화수/인피부면적、총고용/인피부면적、실립중/인피부면적여강、약세립적 GR max 화 GR mean 부상관,여곡립충실솔부상관,여 D 、T 99화 T max 정상관；수도조직활성여강、약세립 GR max 화 GR mean 현저혹겁현저정상관,여곡립충실솔정상관,여 D 、T 99화 T max 정상관.수경수도조직여자립관장결실관계밀절,개선수경수도조직특성유리우자립관장결실.
The grain yield,the characteristics of conducting tissue in the first internode and their relations with the grain-filling were analyzed by using four hybrid rice combinations derived from R1 126 as materials and Shanyou 63 as a control.The results showed that the grain yield of the four hybrid rice combinations was 7.43% to 24.23% higher than that of Shanyou 63.Increased total grain number and filled grain number per panicle attributed to yield increase. Compared with Shangyou 63,hybrid rice combinations derived from R1 126 had advantages in the neck diameter,area of stem wall,ration of stem wall to cross,No.of vascular bundles(VB),total area of VB,total area of phloem,the ratio of VB area to phloem area as well as conducting tissue activity,while had lower ratio of spikelet number to area of VB,ratio of spikelet number to area of phloem,ratio of total sink to area of VB,ratio of total sink to area of phloem, ratio of full grain weight to area of VB,ratio of full grain weight to area of phloem,and the organic material transfer to panicle was fluency.The derived hybrid rice combinations were characterized by greater initial grain-filling potential (R 0 ),maximum grain-filling rate (GR max )and mean grain-filling rate (GR mean ),earlier maximum grain-filling rate (T max ),shorter active grain-filling period (D )and effective grain-filling time (T 9 9 ),faster grain filling and reasonable filling dynamics,smaller d- value of final weight of a kernel (A )between superior and inferior grains,which contribu-ted to good grain-filling.The correlation analysis showed that the ration of spikelet number,grain weight,total sink capacity to area of phloem were negatively correlated with GR max and GR mean of SG and IG,and grain-filling rate.And D ,T 9 9 ,T max were positively correlated with them as well as conducting tissue activity.Conducting tissue in the first in-ternode had closed relationship with grain-filling,improving its characteristics could be beneficial to grain filling.