CAJ | 학술논문

[目的]对粳不籼恢亚种间杂交稻株高与节间性状的遗传效应与杂种优势进行分析。[方法]以6个粳型不育系与9个偏籼型广亲和恢复系进行不完全双列杂交，采用加性一显性遗传模型及其统计分析方法，对粳不籼恢亚种间杂交稻的株高与节间性状进行遗传研究。[结果]粳不籼恢亚种间杂交稻的株高、穗长和节间1长性状主要受到加性效应的控制，而节间3长、节问4长和节间5长性状以显性效应为主。株高、穗长、伸长节间数和大多数节间长度性状的狭义遗传率和广义遗传率均达显著水平。株高与穗长、各节间长度和伸长节间数成对性状之间的表现型、基因型、加性和显性相关系数正值均达到显著水平，其余各成对性状之间大都表现为显著的正向相关。杂种优势分析表明，节间3长、节间4长、节间5长和节间6长性状的群体平均优势和群体超亲优势正值较大，均达极显著水平，株高性状的群体平均优势正值也达极显著水平。[结论]该研究为粳不籼恢亚种间杂交稻株高及节间性状的遗传改良和杂种优势利用提供了更可靠的理论依据。
[목적]대갱불선회아충간잡교도주고여절간성상적유전효응여잡충우세진행분석。[방법]이6개갱형불육계여9개편선형엄친화회복계진행불완전쌍렬잡교，채용가성일현성유전모형급기통계분석방법，대갱불선회아충간잡교도적주고여절간성상진행유전연구。[결과]갱불선회아충간잡교도적주고、수장화절간1장성상주요수도가성효응적공제，이절간3장、절문4장화절간5장성상이현성효응위주。주고、수장、신장절간수화대다수절간장도성상적협의유전솔화엄의유전솔균체현저수평。주고여수장、각절간장도화신장절간수성대성상지간적표현형、기인형、가성화현성상관계수정치균체도현저수평，기여각성대성상지간대도표현위현저적정향상관。잡충우세분석표명，절간3장、절간4장、절간5장화절간6장성상적군체평균우세화군체초친우세정치교대，균체겁현저수평，주고성상적군체평균우세정치야체겁현저수평。[결론]해연구위갱불선회아충간잡교도주고급절간성상적유전개량화잡충우세이용제공료경가고적이론의거。
[Objective] This study aimed to investigate the genetic effects and heterosis of plant height and internode traits of japonica-indica hybrid rice. [Methed] Incomplete diallel crosses were made between six japonica CMS lines and nine indica widecompatibility restorer lines; the genetic effects of plant height and internode traits of japonica-indica hybrid rice were analyzed using the additive-dominance genetic model. [Result] The ple, nt height, panicle length and the length of internode 1 of japonica-in- dica hybrid rice were mainly controlled by the additive effects; but the length of in- ternode 3, internode 4 and internode 5 were mainly controlled by dominance effects. Both the narrow sense heritability and broad sense heritability of plant height, panicle length, number of elongated internodes and length of most internodes reached signifi- cance level. The positive phenotypic correlation, genetic correlation, additive correla- tion and dominance correlation between plant height and panicle length, number of e- longated internodes and internode length were significant; and most of the other paired traits were significantly positively correlated. Heterosis analysis showed that the positive heterosis value over mid-parent and positive heterosis value over better- parent of the length of internode 3, internode 4, internode 5 and internode 6 reached significant level, and the heterosis value over mid-parent of plant height reached extreme significance level. [Conclusion] This study will provide reliable theoretical basis for the genetic improvement and heterosis utilization of plant height and internode traits in japonica-indica hybrid rice.