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杂交水稻组合
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  hybrid rice combinations
     Using three hybrid rice combinations Shanyou 63, Qingyouzao and Xiuyou 57 grown in field (natural condition) as material, effect of chilling (5℃) and light (210 μmol m~(-2)s~(-1)PFD) on chlorophyll fluorescence at 77K of flag leaves in hybrid rice F_1 and its parents were investigated.
     以大田栽培的三套杂交水稻组合汕优63,青优早和秀优57为材料,研究了低温(5℃)与光照(210 μmol m~(-2)s~(-1)PFD)对杂交水稻F_1及其亲本剑叶77K荧光的影响。
短句来源
     The Theory and Practice in the Breeding of Hybrid Rice Combinations
     杂交水稻组合选配的理论和实践
短句来源
     Objective:To test the F_1 genetic purity of five two-line hybrid rice combinations,SDS-PAGE of seed storage proteins,ultrathin- layer isoelectric focusing of esterase isoenzyme and RAPD molecular markers were used in this report.
     目的:探讨利用种子贮藏蛋白SDS—PAGE电泳、酯酶同工酶超薄等电聚焦电泳和RAPD分子标记鉴定五个两系杂交水稻组合F_1种子纯度的可行性。
短句来源
     With the introduction of five Chinese hybrid rice combinations to Pakistan.
     为在巴基斯坦开发杂交水稻 ,筛选出 1~ 2个适宜在巴基斯坦种植的杂交水稻组合 ,对中国 5个杂交水稻组合引种到巴基斯坦的表现进行了观察分析 .
短句来源
     5 Chinese hybrid rice combinations were introduced to Indonesia for trial and demonstration.
     5个中国杂交水稻组合参加印度尼西亚国家水稻区域试验。
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  combination of hybrid rice
     For Ⅱ-you 162 which is a super high yield combination of hybrid rice,the cultivation pattern of high yield was analyzed with the device of secondary regression orthogonal rotary combination.
     针对杂交水稻组合Ⅱ优162开展了高产栽培模式研究。
短句来源
  “杂交水稻组合”译为未确定词的双语例句
     Experiments in 1984 with isolate 042 of Pyricularia oryzae Cavara inoculating rice plants of P1 ,P2,F1,F2and F3 generations from 9 crosses(2 of them had no F3 generation) revealed that IR24,IR26 and Giliang each has 1 dominant resistance gene-V20A has 2 recessive tesistance genes.
     在1984年用042号稻瘟病菌株接种9个杂交水稻组合的亲本、F_1、F_2、F_3代的结果表明,IR_(24)、IR_(26)和吉粱各具有1对显性抗瘟基因; V_(20)A具有2对隐性抗瘟基因;
短句来源
     There is a positive correlationship between tiller number and ~(32)P,~(14)C distributed in tillers and panicle of 8 hybrid rices,the corrrelation coefficient is r=0.569(n=21),r=0.532(n=22),respectively.
     8个杂交水稻组合的分蘖数,与分蘖期~(32)P及~(14)C在分蘖的分布(%)呈显著正相关,相关系数分别为r=0.569(n=21),r=0.532(n=22)。
短句来源
     Experiments in 1983 and 1934 with a strain of Xanthomonas campestris var, oryzae ( Ishiyama ) Dye inoculating rice plants of P1 ,P2 , F1 , F2 and F3 generations from 9 crosses ( 2 of them had no F3 generation ) revealed that VT34_1 had 2 complementary dominant resistance genes;
     用9号白叶枯菌株接种9个杂交水稻组合的亲本。 F_1、F_2和F_3代的结果表明,VT_(34-1)具有2对显性互补的抗病基因;
短句来源
     SSR allele polymorphism of 6 hybrids and their parents was studied by analysing 40 SSR loci distributing on 12 chromosomes in rice.
     选用分布于水稻12条染色体上的40对SSR引物对6个杂交水稻组合及其亲本的幼苗进行了SSR等位基因多态性分析。
短句来源
     It is suggested that 0. 3%~0.5% of Liberty should be sprayed during 3~4 leaf stage in the produc tion of herbicide-resistant hybrids.
     建议将抗性杂交水稻组合用于大田生产时 ,在 3~ 4叶期喷施 0 .3 %~ 0 .5 %的Liberty水溶液比较合适。
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  hybrid rice combinations
Comparison of Some Photosynthetic Characters Between Two Hybrid Rice Combinations Differing in Yield Potential
      
Photosynthetic characteristics of two hybrid rice combinations, Peiai 64S/E32 and Shanyou 63, were compared at the panicle differentiation stage.
      
Three hybrid Rice combinations and their parental lines, totaling 8 specimens, were tested by means of SSR analysis.
      


A serious damage to rice cultivated are as was caused by brown hoppers in the south of China. The resistance of popularized hybrid rice to brown hoppers and theft of normally improved varieties differ from each other. The representative varieties were classified into three types: high, medium and nonresistance plant analyses to find which components resist brown hoppers was conducted from 1978 to 1981.It has been found that the quantities of γ—aminobutyric acid and histamine are significantly higher in high—resistant...

A serious damage to rice cultivated are as was caused by brown hoppers in the south of China. The resistance of popularized hybrid rice to brown hoppers and theft of normally improved varieties differ from each other. The representative varieties were classified into three types: high, medium and nonresistance plant analyses to find which components resist brown hoppers was conducted from 1978 to 1981.It has been found that the quantities of γ—aminobutyric acid and histamine are significantly higher in high—resistant varleties,free amino—acids and soluble sugars are lower and asqaragin is the lowest, while the quantities of the above in non—resistant varieties are just the contrary. γ—aminobutyric acid formed by the catalytic action of glutamate dccarboxylase in rice plant is an important brown hopper—resistant con stituent.the strong or weak resistance of hybrid rice at prescnt is mainly influenced by the restorers. The stated above may be used as an index for the resistance to brown hoppers to a large exetent.

我国南方稻区稻褐飞虱危害严重。目前推广的杂交水稻及常规良种对稻褐飞虱的抗性参差不齐。1978—1981年我们对有代表性的诸品种,分高抗、中抗、不抗三种类型进行抗稻褐飞虱成份的探索性分析,结果发现抗性品种植株中游离氨基酸总量低,其中天冬酰胺最低,可溶性糖亦低,而γ—氮基丁酸和组胺的含量则较高,不抗品种则刚好相反。γ—氮基丁酸是抗生性的重要成份,系由植株谷氨酸脱羧酶催化生成。在目前推厂的杂交水稻组合中抗性强弱主要受恢复系的影响。上述诸项可作为抗性指标扩大范围加以验证。

A serious damage to rice cultivated areas was caused by brown hoppers in the south of China.The resistance of popularized hybrid rice to brown hoppers and that of normally improved varieties differ from each other.The representative varieties were classified into three types:high,medium and nonresistance plant analyses to find which components resist brown hoppers was conducted from 1978 to 1981.It has been found that the quantities of γ—aminobutyric acid and histamine are significantly higher in high—resistant...

A serious damage to rice cultivated areas was caused by brown hoppers in the south of China.The resistance of popularized hybrid rice to brown hoppers and that of normally improved varieties differ from each other.The representative varieties were classified into three types:high,medium and nonresistance plant analyses to find which components resist brown hoppers was conducted from 1978 to 1981.It has been found that the quantities of γ—aminobutyric acid and histamine are significantly higher in high—resistant varicties,frcc amino—acids and soluble sugars are lower and asqaragin is the lowest,while the quantities of the above in non—resistant varieties are just the contrary.γ—aminobutyric acid formed by the catalytic action of gluta- mate dccarboxylase in rice plant is an important brown hopper—resistant con stituent.the strong or weak resistance of hybrid rice at present is mainly influenced by the restorers.The stated above may be used as an index for the resistance to brown hoppers to a large exetent.

我国南方稻区稻褐飞虱危害严重。目前推广的杂交水稻及常规良种对稻褐飞虱的抗性参差不齐。1978—1981年我们对有代表性的诸品种,分高抗、中抗、不抗三种类型进行抗稻褐飞虱成份的探索性分析,结果发现抗性品种植株中游离氨基酸总量低,其中天冬酰胺最低,可溶性糖亦低,而γ-氨基丁酸和组胺的含量则较高;不抗品种则刚好相反。γ-氨基丁酸是抗生性的重要成份,系由植株谷氨酸脱羧酶催化生成。在目前推广的杂交水稻组合中抗性强弱主要受恢复系的影响。上述诸项可作为抗性指标扩大范围加以验证.

Studies were made on the correlation of phenotype and genotype between the yield and characters of F1 hybrids in rice, the main results obtained from 21 dwarfs (plant height under 90 cm.) are summarized as follows,There were six charaters(such as plant height, panicle length, panicle density, number of spikelets per panicle, filled grains per panicle and percentage of filled grains) were phenotypic positively correlated to the yield at significant level among eleven characters, but~filled grains per panicle...

Studies were made on the correlation of phenotype and genotype between the yield and characters of F1 hybrids in rice, the main results obtained from 21 dwarfs (plant height under 90 cm.) are summarized as follows,There were six charaters(such as plant height, panicle length, panicle density, number of spikelets per panicle, filled grains per panicle and percentage of filled grains) were phenotypic positively correlated to the yield at significant level among eleven characters, but~filled grains per panicle was correlated with the yield very closely. The correlation have been described as above were controlled by the factor of heredity. Number of sterile spikelets per panicle was phenotypic negatively correlated to the yield at significant level, but the correlation was mainly dependent on the factor of environment. The genotypic negative correlation of tillers per plant, of panicles per plant and the .yield related more closely. The correlation coefficient were very small between 100-grain weight and the yield. Filled grains per panicle bore the greatest effect among the direct effect on the yield of three yield constructive characters, the effect of panicles per plant was much lower than filled grains per panicle, so did 100-grain weight was lower than panicles per plant. Therefore we should pay special attention to improve filled grains per panicle when draw up a plan and make the selection of height yield of hybridized combination in rice.

对21个矮秆的(株高在90cm以下)杂种一代的产量与主要性状之间的表现型及基因型关联性作了研究,主要结果如下: 在11个调查性状中,有6个性状与产量有显著的表现型正相关关系,这些性状是:株高,穗长,着粒密度,每穗小穗数,每穗实粒数和结实率,其中以每穗实粒数与产量的关系最为密切,上述关系在较大程度上是由遗传因素所决定。每穗空粒数与产量之间呈显著的表现型负相关,这种关系主要地取决于环境因素。每株茎数和每株穗数与产量间存在着较密切的基因型负相关。百粒重与产量之间相关系数极小。在3个产量构成性状对产量的直接作用中,以每穗实粒数的作用最大,每株穗数的作用明显地低于每穗实粒数,百粒重的作用又较每株穗数小,因此,在设计和选配高产的杂交水稻组合时,应该特别注意提高每穗实粒数。

 
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