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susceptible parents
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  感亲本
     By SSR analysis with 45 pairs of primers located on 7B chromesome in 171 individuals of F2 segregation population and their resistant and susceptible parents, we screened a molecular marker WMC364-207bp/201bp that linked to the stripe rust resistance gene Yr2. Genetic distance among marker WMC364-207bp/201bp and resistance gene Yr2 was calculated as 5. 6 cM.
     进一步用7B染色体上的45对SSR引物对抗、感亲本及171株F2分离群体进行SSR分析,筛选出一个与小麦抗条锈病基因Yr2紧密连锁的SSR标记WMC364-207 bp/201 bp。 通过最大似然法计算,该标记与Yr2基因之间的遗传距离为5.6 cM。
短句来源
     Based on the percentage of damaged seeds or pods of the resistant and susceptible parents, insect resistance of the F2 plants were rated on a 5 grade scale.
     根据抗、感亲本的虫食粒率和受害荚率,将F_2代植株的抗虫性分为5级。
短句来源
     A genetic study of a cross using YW243 and Jing 771 as resistant and susceptible parents revealed that the stripe resistance of YW243 to CY31 was controlled by a single dominant gene.
     用YW2 4 3和京 771分别作为抗感亲本进行杂交 ,后代分离结果表明 ,YW2 4 3对条锈菌CY31的抗性由 1个显性基因控制。
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  “susceptible parents”译为未确定词的双语例句
     to race IB-33 from the crosses among susceptible parents of RA73, Katy and Bond, and to races IB-49 and IC-17 from the crosses among susceptible parents of RA73, Lemont, L202 and Bond, indicating the absence of complementary resistance genes in these parents to corresponding 4 races and probable allele of the susceptible genes in these parents .
     感病亲本Lemont、L202、 Katy和Bond对小种IE-1k,感病亲本RA73、Katy和Bond对小种IB-33,以及感病亲本RA73、Lemont、L202 和Bond对小种IB-49和IC-17,其F2的植株全为感病,说明这些亲本对相应的小种缺乏互补的抗病基因,其感病基因是等位的。
     The rate of the spikelets infected with scab in both F1 and F2 individuals were studied to study the inheritance of the resistance to scab in wheat.A 4×4 half-diallel device with two resistant and two susceptible parents was adopted in the experiment.
     本试验用2个抗赤霉病品种和2个感病品种的4×4双列杂交的F_1和F_2代,研究了小麦赤霉病病小穗率的遗传;
短句来源
     The F1-plants from crosses between stable resistant variants and susceptible parents were high resistant to powdery mildew.
     抗性稳定株系与感病亲本杂交,F1表现高抗病,再与感病亲本回交,后代抗感病株比例为1:1。
短句来源
     According to the analysis on hybrid rice resistance to blast the hybrid combinations of high and medium resistance parents possess high resistance, the combinations of high resistance and susceptible parents possess medium resistance and the combinations of both susceptible parents possess highly susceptible.
     选用分属于4个不育系的水稻杂交组合的亲代与子代,对7个有代表性的稻瘟病菌生理小种的抗瘟性遗传系谱分析结果表明:高抗与中抗的亲本组合,其杂交组合(F1)表现为高抗; 高抗或中抗与高感的亲本组合.其杂交组合(F1)抗性都表现为中抗,呈不完全显性;
短句来源
     266 pairs of SSR primers located on 21 wheat chromosomes were used for polymorphic analysis of the two resistant and the susceptible parents ‘Yining Xiaomai’ and ‘Zhen9523’,and 108 of them amplified polymorphic DNA products.
     选取涉及小麦21条染色体上的266对SSR引物在“仪宁小麦”和“镇9523”间进行筛选,其中108对引物在两亲本间表现多态。
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  相似匹配句对
     Parents and Children
     父母与子女
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     Of Parents and Children
     论父母与子女
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     The results showed that the difference between the resistant and susceptible parents was significant.
     结果表明,两个抗病亲本和两个感病亲本抗性差异显著;
短句来源
     8 crossing combinations from resistant parents with susceptible ones were studied.
     本研究通过8个杂交组合F_1、F_2、F_3和B_1代的调查统计分析,研究大豆对灰斑病抗病性的遗传。
短句来源
     The variety Y2 was susceptible.
     病害发生与桑树品种关系密切,育2号为易感病品种。
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  susceptible parents
The susceptibility to tuber blight (Phytophthora infestans) of seedling progenies from ten crosses involving resistant and susceptible parents was assessed by inoculating tubers grown in the glasshouse and in the field.
      
Under intermediate Fe deficiency, reciprocal F1 hybrids (`line 227/1 × Roza' and `Roza × line' 227/1) showed an intermediate chlorosis between tolerant and susceptible parents.
      
Despite visual differences in early-season plant vigor in non-limed acid soil, the Al-tolerant selections did not yield greater season-long forage than their susceptible parents.
      
We selected two lines, from a QTL mapping population created using the resistant variety Chevron, and crossed them to susceptible parents to generate two validation populations.
      
For the loci on chromosome?5 and 10, segregation for resistance alleles from the susceptible parents was also observed.
      
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The inheritance of mature plant resistance to race CY-2 of Puccinia glumarum Erikss.et Henn.was studied in 133 sets of intervarietal crosses of winter wheat during 1955 to 1958.When immune varieties were used as one of the parents,resistance in the F_1 generation inmost of the crosses was shown to be dominant.The dominance of the resistance of F_1 hybridwas found to be not only conditioned by the immune parent but also more or less influencedby the degree of resistance of the other parent,being...

The inheritance of mature plant resistance to race CY-2 of Puccinia glumarum Erikss.et Henn.was studied in 133 sets of intervarietal crosses of winter wheat during 1955 to 1958.When immune varieties were used as one of the parents,resistance in the F_1 generation inmost of the crosses was shown to be dominant.The dominance of the resistance of F_1 hybridwas found to be not only conditioned by the immune parent but also more or less influencedby the degree of resistance of the other parent,being less with susceptible varieties thanwith resistant ones.With the resistant × resistant and resistant × susceptible crosses,therewas also a small portion in which the resistance of F_1 hybrid was shown to be dominant.Studies were made on F_1 plants of 24 pairs of crosses,F_2 plants of 8 pairs of crosses andF_3 plants of 2 pairs of crosses,for any reciprocal differences in the inheritance of resistance,each pair involving an immune and a susceptible parent.No difference was observed whe-ther the immune variety was used as maternal or as paternal parent.Analysis based on careful field observations indicated that the stability and the heritabilityof resistance of“partial immune”hybrid plants (only the middle and upper leaves being im-mune,while the lower leaves showing a susceptible or moderate resistant reaction) appearedto be lower than that of the“whole plant immune”ones (all leaves of the plant showing anuniform immune reaction).When varieties with“partial immune”reaction were used as theresistant parents,plants with infected middle and lower leaves were relatively common in theF_1 population.When a“whole plant immune”variety was used all the F_1 population wasfound to be unaffected.The importance of choosing the“whole plant immune”variety asresistant parent and selecting the“whole plant immune”hybrid plant in breeding rust resistantvarieties was emphasized.

对133个小麦品种间杂交组合的观察结果指出,凡有免疫品种为亲本的组合,其 F_1抗病性表现显性的机率都很高,而其机率的高低又与另一亲本抗病性的强弱呈正相关。对24对正反交组合的 F_1代,8对的 F_2代和2对的 F_3代作比较观察的结果表明用免疫品种作父本与母本,对后代抗病性的表现和分离并无不同影响。根据田间调查结果,看出杂种后代中底部叶片轻微发病的植株其抗病性稳定程度和遗传力低于“全株免疫株”;用底部叶片发病,中上部叶片表现免疫的品种作抗病亲本,F_1代的中下部叶片发病比较普遍;而用全株免疫的品种作抗病亲本,F_1代一般没有发病现象。试验结果证明 F_1代和 F_2代中的“少茎病株”(同一植株中多数分蘖免疫,个别或少数分蘖感病),其后代(F_2和 F_3)分离出的免疫株率与全株免疫株差别不明显。感病分蘖与同株免疫分蘖的后代在抗病性的分离上也无显著差别。石特14×胜利组合 F_2免疫株的后代(F_3)中有15.8%的株系全部植株免疫;“0;”型和“1”型 F_3植株分离出的免疫株率各达到80.3%和55.5%,但汉有出现免疫的株系。

The inheritance of stripe rust(Puccinia striiformis)resistance inwheat was studied in the breeding programs as well as in separately de-signed experiments.The results obtained are as follows:(1)The geneticbehaviors of different resistant materials were different,both in domi-nance and in simplicity or complexity.The so-called“hereditary ability ofresistance”is the joint expression of dominance and the number of resi-stant genes involved.(2)Most of the materials studied showed an in-complete dominance;complete...

The inheritance of stripe rust(Puccinia striiformis)resistance inwheat was studied in the breeding programs as well as in separately de-signed experiments.The results obtained are as follows:(1)The geneticbehaviors of different resistant materials were different,both in domi-nance and in simplicity or complexity.The so-called“hereditary ability ofresistance”is the joint expression of dominance and the number of resi-stant genes involved.(2)Most of the materials studied showed an in-complete dominance;complete dominance or recessiveness occurred butrarely.It was also observed that the expression of dominance was in-fluenced by the susceptible parents used and the different physiologicraces inoculated.(3)Difference between simple and complex inheritanceof rust resistance did exist with different resistant materials.Among theresistant parent materials used,Jubileina Ⅰ,Ⅱ,Ⅲ,Okerman,Virgilioand Suwan 11 seemed to be comparatively simply inherited;they werecomfirmed as better resistant parents by the outcome of breeding projects.It was also suggested that the simply inherited rust resistance could bediscovered with the help of backcross progenies.(4)Genetic evaluationof different sources of stripe rust resistance in breeding projects themethodology for the analysis of stripe rust resistant genes and the futureprospect in the study of the inheritance of stripe rust resistance in wheatwere also discussed.

在抗锈育种过程中观察分析了不同材料对条锈病抗性的遗传行为,也为此单独设计了一些试验。结果表明:(1)不同抗锈材料对条锈病抗性的遗传行为有显性、隐性、简单、复杂之别。所谓抗锈性遗传传递能力的“强”、“弱”是抗锈性的显、隐性遗传和抗锈基因数目多少的共同结果。(2)供试材料大多呈不完全显性或隐性遗传,呈完全显、隐性遗传的极少。感病亲本和锈菌生理小种都对显、隐性的表现有影响。(3)抗锈基因分析工作虽没有完成,但也看到不同材料抗锈性遗传的简单或复杂程度是有差异的,尤皮号、奥克曼、维尔、水原11等对条锈病抗性的遗传比较简单。并提出利用回交后代检验亲本抗锈性遗传简单或复杂的方法。(4)对抗锈性遗传行为不同的亲本材料的利用价值,进行抗锈基因分析的方法,以及今后抗锈性遗传研究的前景也进行了讨论。

8 crossing combinations from resistant parents with susceptible ones were studied. The results of the research indicated that the resis-tance to frogeye leaf spot of soybean (Cercospora sojina Hara) of all of the F1 appears to be dominant completely, the segregation ratio of the resistant to the susceptible of F2 equal 3:1, there were quite a few resistant lines among F3 from single resistant plant of F2 with segregation ratio of 2:1 of resistant segregat to resistant lines. All of the generation B1 from back...

8 crossing combinations from resistant parents with susceptible ones were studied. The results of the research indicated that the resis-tance to frogeye leaf spot of soybean (Cercospora sojina Hara) of all of the F1 appears to be dominant completely, the segregation ratio of the resistant to the susceptible of F2 equal 3:1, there were quite a few resistant lines among F3 from single resistant plant of F2 with segregation ratio of 2:1 of resistant segregat to resistant lines. All of the generation B1 from back crossing of F2 with resistant parents are resistant while the generation B1 from back crossing of F2 with susceptible parents has segregation ratio of 3:1 of resistant to susceptible.Therefore, it can be sure that the resistibility to the disease is a simple heredity manipulated by a pair of dominant genes. And susceptibility to that is controlled by a pair of recessive genes.

本研究通过8个杂交组合F_1、F_2、F_3和B_1代的调查统计分析,研究大豆对灰斑病抗病性的遗传。结果表明:F_1代抗灰斑病为完全显性;F_2代抗病与感病按3:1比例分离;F_2代抗病单株后代(F_3代)即出现一定比例的抗病系。抗病性分离系与抗病系分离比例为2:1。F_1代以抗病亲本回交所产生的B_1代,均表现抗病;以感病亲本回交的B_1代,抗病与感病的分离比例为1:1。因此,大豆对灰斑病抗病性是由一对基因控制的简单遗传。

 
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