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spikelet structure
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  小穗结构
     Some morphological variations were observed in T_0 and T_1 transgenic plants such as dwarf, non-tiller or multi-tillers, decrease of seed-setting, changes of grain or panicle shape or spikelet structure.
     T0及T1代转化植株均呈现了一些形态变异,如矮化、无分蘖或多分蘖、结实率降低、粒型或穗型改变、小穗结构改变等.
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  “spikelet structure”译为未确定词的双语例句
     Analysis on Panicle and Spikelet Structure of Late Hybrid Rice
     杂交晚稻穗粒结构观察分析
短句来源
     Genetic Analysis of Multiple Grain Sorghum Germ Plasm and Spikelet Structure Anatomical Analysis
     复粒小穗高粱种质资源结构及遗传分析
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  相似匹配句对
     On ITS Structure
     论ITS的结构体系
短句来源
     The structure of C.
     剖析C.
短句来源
     Analysis on Panicle and Spikelet Structure of Late Hybrid Rice
     杂交晚稻穗粒结构观察分析
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  spikelet structure
These distinct anatomical features, in combination with the differences in spikelet structure and habitat, suggest that Aniselytron should be generically separated from and not merged with Calamagrostis s.
      
The importance of these two linkage groups reveals their central role both in the developmental control of spikelet structure and in the domestication process of this crop.
      
The most critical adaptive changes resulting from the domestication process involved the spikelet structure: non-shedding seeds with reduced bracts and bristles and long involucral pedicel.
      


All the inter-subspecific combinations from indica CMS line Shan A crossed with 15 indica-japonica intermediate restorer lines showed heterosis in spikelets per panicle but negative heterosis in 1000-grain weight,while their productive panicles per plant and seed- setting rate were almost the same as the check.The yield of hybrid showed significant partial correlation with spickelets per panicle, productive panicle per plant,seed setting rate and 1000-grain weight,but significant negative partial correlation...

All the inter-subspecific combinations from indica CMS line Shan A crossed with 15 indica-japonica intermediate restorer lines showed heterosis in spikelets per panicle but negative heterosis in 1000-grain weight,while their productive panicles per plant and seed- setting rate were almost the same as the check.The yield of hybrid showed significant partial correlation with spickelets per panicle, productive panicle per plant,seed setting rate and 1000-grain weight,but significant negative partial correlation were found between the four characters.We also found that there were no relations between indica/japonica property of the intermediate male parents and the major agronomic characters of their progenies.For promoting the heterosis of inter-subspecific hybrids,it is essential to develop intermediate restorer lines with ideal plant type,high 1000-grain weight and rational panicle-spikelet structure.

以汕型野败不育系汕A为母本,15个籼粳中间型恢复系为父本配制的三系亚种组合进行优势和相关分析。结果表明,三系亚种间杂种优势主要表现在穗粒数上,穗数和结实率与对照相当,而千粒重呈显著负优势;杂种产量与穗粒数、穗数、结实率、千粒重呈极显著正偏相关,而这4个性状之间又呈极显著负偏相关。中间型父本的籼粳性与其杂种各主要农艺性状的相关不显著。选育株型理想、千粒重稍大、穗粒结构合理的中间型恢复系是获得更强亚种间杂种优势的关键。

A strategy of shotgun antisense gene silencing was used to generate a rice mutant library. A total of (1 486) transgenic rice plants were obtained from 105 independent Hygromycin(Hm) resistant calli transformed with rice antisense cDNA library, using japonica cultivar Zhonghua 11 as transformation material. A total of 335 T_0 transformants from 11 independent calli were selected randomly to test Hm resistance by leaf segments screening. The results showed that all T_0 plants tested were Hm resistant, coincident...

A strategy of shotgun antisense gene silencing was used to generate a rice mutant library. A total of (1 486) transgenic rice plants were obtained from 105 independent Hygromycin(Hm) resistant calli transformed with rice antisense cDNA library, using japonica cultivar Zhonghua 11 as transformation material. A total of 335 T_0 transformants from 11 independent calli were selected randomly to test Hm resistance by leaf segments screening. The results showed that all T_0 plants tested were Hm resistant, coincident with the results of PCR analysis, indicating that no escapee existed in T_0 transformants. The result of Southern blot analysis revealed that most of the transgenic plants contained single T-DNA insertion. Some morphological variations were observed in T_0 and T_1 transgenic plants such as dwarf, non-tiller or multi-tillers, decrease of seed-setting, changes of grain or panicle shape or spikelet structure. One mutant was characterized, the mutative traits of which cosegregated with Hm resistance. The mutant displayed about 50% decrease of seed-setting rate and 40% decrease of total number of spikelets per panicle, resulting in about 70% decrease of seed production per panicle as compared with non-transgenic control.

尝试利用鸟枪反义基因沉默策略构建水稻突变体库.利用水稻反义cDNA文库转化粳稻品种中花11,获得了来源于105块潮霉素(Hm)抗性愈伤组织的1486个转化植株.随机选择来源于11个独立转化系的335个T0植株进行Hm离体叶片筛选,结果表明所有植株均呈抗性,并且与PCR检测结果相吻合,说明T0植株中不存在假转化体.Southernblot分析结果表明T0植株大部分为单位点整合.T0及T1代转化植株均呈现了一些形态变异,如矮化、无分蘖或多分蘖、结实率降低、粒型或穗型改变、小穗结构改变等.利用Hm离体叶片筛选法对部分T1群体进行筛选,得到了1个变异性状与Hm抗性共分离的突变体,该突变体的变异表型为结实率比非转化对照下降约50%,每穗颖花总数比对照减少约40%,二者的总效应导致突变体单穗产量比对照约下降70%.

 
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