CAJ | 학술논문

[目的]研究甘蓝型油菜N素籽粒生产效率的杂种优势,为生产上N高效品种的选育提供理论参考.[方法]测定2个N肥水平下6个甘蓝型油菜亲本(浙双3号、扬油7号、ZJ1、史力佳、宁油14号和沪油16)及其完全双列杂交组合成熟期干物质牛产及N素含量.各器官N素含量采用凯氏定氮法测定;分析并计算N素籽粒牛产效率的杂种优势、配合力效应以及遗传力大小.[结果]N素籽粒生产效率存在明显的杂种优势,离中亲优势全为正值.低N条件下杂交种N素籽粒生产效率与亲本相比,增加幅度为9.44%.高N条件下杂交种N素籽粒生产效率与亲本相比,增加幅度为14.77%;配合力方差分析表明GCA、SCA和反交效应均达到极显著水平,说明N素籽粒牛产效率受加性效应、非加性效应和细胞质效应的共同影响;N素籽粒生产效率在低N和高N条件下的广义遗传力分别为96.9r7%和97.09%,说明N素籽粒生产效率主要由遗传冈素决定,受环境影响比较小.低N和高N条件下的狭义遗传力分别为46.06%和29.56%.由此可见,低N条件下N素籽粒生产效率的基因加性作用和非加性作用都比较重要,而高N条件下则以基因的非加性效应为主.[结论]油菜N素籽粒生产效牢存在明显的杂种优势.
[목적]연구감람형유채N소자립생산효솔적잡충우세,위생산상N고효품충적선육제공이론삼고.[방법]측정2개N비수평하6개감람형유채친본(절쌍3호、양유7호、ZJ1、사력가、저유14호화호유16)급기완전쌍렬잡교조합성숙기간물질우산급N소함량.각기관N소함량채용개씨정담법측정;분석병계산N소자립우산효솔적잡충우세、배합력효응이급유전력대소.[결과]N소자립생산효솔존재명현적잡충우세,리중친우세전위정치.저N조건하잡교충N소자립생산효솔여친본상비,증가폭도위9.44%.고N조건하잡교충N소자립생산효솔여친본상비,증가폭도위14.77%;배합력방차분석표명GCA、SCA화반교효응균체도겁현저수평,설명N소자립우산효솔수가성효응、비가성효응화세포질효응적공동영향;N소자립생산효솔재저N화고N조건하적엄의유전력분별위96.9r7%화97.09%,설명N소자립생산효솔주요유유전강소결정,수배경영향비교소.저N화고N조건하적협의유전력분별위46.06%화29.56%.유차가견,저N조건하N소자립생산효솔적기인가성작용화비가성작용도비교중요,이고N조건하칙이기인적비가성효응위주.[결론]유채N소자립생산효뢰존재명현적잡충우세.
[Objective]The aim was to study heterosis of N use efficiency for grain production(NUEg)of Brassica napus L.and provide theoretical basis for breeding N-efficient cultivars.[Method]Dry matter production and N content of six B.napus parents(Zheshuang 3, Yangyou 7,ZJ1, Shilijia,Ningyou 14 and Huyou 16)and their F, combinations from 6 × 6 complete diallel cross in maturity stage under two N levels were measured; heterosis of NUEg, combining ability and heritability size were analyzed and calculated.[Result]The results showed that NUEg has obvious heterosis; combining ability variance analysis indicated that NUEg was mainly controlled by additive, dominant and cytoplasmic effects;genetic variance analysis showed that additive effects and dominance effects were all significant in tow nitrogen fertilizer and dominance effects were significant in high nitrogen fertilizer.[Conclusion]NUEg of B.napus has obvious heterosis.