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The advantages and limitations of such an interaction type for future rose breeding programmes and for markerassisted selection strategies are discussed.


This is also in accordance with the reported history of rose breeding which makes it highly probable that rose genomes comprise mosaics of different species genomes.


Rose breeding is now open to the full range of in vitro genetic manipulation techniques involving protoplast technology.


In the year 1946, Lamments for the first time reported the use of embryo culture in rose breeding.


Rose breeding firms exist in every major rose growing country and new cultivars move between countries rapidly.




 This paper reports the chromosome numbers and karyotypes of some parents and F_1 hybrid seedlings in the breeding Rejuvenation Rose Group. The results are as follows: in breeding for Rejuvenation Rose Group the parent plants Rosa primula 2n=2x=14=14m, Rosa xanthina f. normalis 2n=2x=14=14m, Rosa hugonis 2n=4x=28=24m+4sm, Rosa cv. Qeen Elizabeth 2n=4x=28=20m+8sm, Rosa cv. Qiushui Furong 2n=4x=28=24m+4sm, Rosa cv. Danfeng Chaoyang 2n=4x=28=28m (2SAT); the F_1 hybrid seedlings: 8401 (Rosa primula×Rosa cv. Zaoxia)... This paper reports the chromosome numbers and karyotypes of some parents and F_1 hybrid seedlings in the breeding Rejuvenation Rose Group. The results are as follows: in breeding for Rejuvenation Rose Group the parent plants Rosa primula 2n=2x=14=14m, Rosa xanthina f. normalis 2n=2x=14=14m, Rosa hugonis 2n=4x=28=24m+4sm, Rosa cv. Qeen Elizabeth 2n=4x=28=20m+8sm, Rosa cv. Qiushui Furong 2n=4x=28=24m+4sm, Rosa cv. Danfeng Chaoyang 2n=4x=28=28m (2SAT); the F_1 hybrid seedlings: 8401 (Rosa primula×Rosa cv. Zaoxia) 2n=2x=14=12m+2sm, 8601 (Rosa cv. Queen Elizabeth×Rosa hugonis)2n=4x=28=28m, 8703 (Rosa cv. Danfeng Chaoyang) 2n=4x=28=28m, 8706 (Rosa cv. Qiushui Furong×Rosa primula) 2n=3x=21=15m+6sm. They all fall in to the 1A type. Some problems concerning karyotype analysis among Rosa species and the cultivars and breeding for establishing Rj. Rose Group were discussed.  本文报道了在刺玫月季育种中使用的6个亲本和4个F_1代杂种的染色体数目和核型。染色体数目及形态,亲本报春刺玫2n=2x=14=14m,单瓣黄刺玫2n=2x=14=14m,黄蔷薇2n=4x=28=28m,‘粉后’2n=4x=28=20m+8sm,‘秋水芙蓉’2n=4x=28=24m+4sm,‘丹凤朝阳’2n=4x=28=28m(2SAT);杂交种8401(报春刺玫×‘早霞’)2n=2x=14=12m+2sm,8601(‘粉后’×黄蔷薇)2n=4x=28=28m,8703(‘丹风朝阳’×报春刺玫)2n=4x=28=28m,8706(‘秋水芙蓉’×报春刺玫)2n=3x=21=15m+6sm。核型均为1A型。文中讨论了与刺玫月季育种有关的细胞遗传学问题。  This paper deals with the pollen, morphology of 5 parent plants and 3 F_1 hybrid seedlings during breeding of new cultivars for establishing a Rejuvenation Rose Group. They were examined under SEM. Most pollens of Rosa xanthina and Rosa cv. Goldilocks are not viable and can not be used as paternal parents. So are some F_1 seedlings. Pollen grain surface patterns can be differentiated between parents and their F_1 seedlings. F_1's differ from their parents in exine ornamentation. But,all species and cultivars... This paper deals with the pollen, morphology of 5 parent plants and 3 F_1 hybrid seedlings during breeding of new cultivars for establishing a Rejuvenation Rose Group. They were examined under SEM. Most pollens of Rosa xanthina and Rosa cv. Goldilocks are not viable and can not be used as paternal parents. So are some F_1 seedlings. Pollen grain surface patterns can be differentiated between parents and their F_1 seedlings. F_1's differ from their parents in exine ornamentation. But,all species and cultivars of Rosa are similar in the gross morphology of their pollen grains.  采用扫描电镜,对刺玫月季育种中使用的5个杂交亲本和3个F_1杂种花粉,进行观察和研究。通过对花粉形态的比较研究,讨论花粉败育对刺玫月季育种的影响,及亲本与杂交种在花粉外壁纹饰上的相关性。  28 parent plants and hybrid seedlings with different coldhardiness were studied using the tissue electrical resistance method and the restoring growth test. A numeral avometer was employed to determine the electrical resistance of the shoot segment of parent and hybrid seedling tissue. The cold hardiness of parent plants and that of some hybrid seedlings was evaluated by calculating the survival rate after different freezing temperature treatments. The relationship between tissue electrical resistance and freezing... 28 parent plants and hybrid seedlings with different coldhardiness were studied using the tissue electrical resistance method and the restoring growth test. A numeral avometer was employed to determine the electrical resistance of the shoot segment of parent and hybrid seedling tissue. The cold hardiness of parent plants and that of some hybrid seedlings was evaluated by calculating the survival rate after different freezing temperature treatments. The relationship between tissue electrical resistance and freezing temperatures and that between tissue electrical resistance and the survival rate of parent plants was established by regression analysis. Based on this model, the cold hardiness of some hybrid seedlings was evaluated. The ralationship of cold hardiness between some parent plants and their hybrid seedlings is discussed.  对刺玫月季育种中的部分亲本和杂交种的枝条,进行不同温度冰冻处理后,采用电阻法测定其电阻值;同时,进行生长恢复试验。依据电阻测定值及扦插存活率,确定植株的抗寒能力。对一些亲本和杂交种枝条的电阻测定值进行回归分析,并建立电阻值与存活率的相关数学模型;通过与相关曲线的对比,结合越冬后抽条率的统计,对一些杂交种的抗寒性进行预测。从遗传角度初步探讨了亲本与子代的抗寒性关系。最后提出了在育种中进行抗寒性研究的可行方法。   << 更多相关文摘 
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