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系杂交水稻
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  line hybrid rice
    Study on IAA oxidase and peroxidase from seedlings in two line hybrid rice
    两系杂交水稻幼苗吲哚乙酸氧化酶和过氧化物酶同工酶的研究
短句来源
    BREEDING OF THE NEWLY DEVELOPED THREE LINE HYBRID RICE XINXIANGYOU 80
    三系杂交水稻新组合新香优80的选育
短句来源
    HIGH YIELD AND QUALITY PRESERVING PRIN CIPLES AND TECHNOLOGIES IN THE TWO LINE HYBRID RICE PEILIANGYOU288′S SEED PRODUCTION
    两系杂交水稻培两优288高产保质制种原理与技术
短句来源
    Based on the analyses of the practice on breeding of two line hybrid rice in Zhejiang Province, some suggestions are effered to promote relative research forward.
    在分析浙江省光温敏不育系和两系杂交水稻研究现状的基础上,提出了进一步解放思想、因地制宜发挥优势开拓创新浙江省两系杂交水稻的建议
短句来源
    PRELIMINARY SUMMARY ON THE SEED PRODUCTION TECHNIQUE IN TWO—LINE HYBRID RICE
    两系杂交水稻制种技术的初步总结
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  “系杂交水稻”译为未确定词的双语例句
    Breeding of Peiliangyou Teqing,A New Two-Line Hybrid Rice Combination
    两系杂交水稻新组合培两优特青的选育
短句来源
    Breeding of the Newly-developed Two-line Hybrid Rice Peiliangyou 288
    两系杂交水稻新组合培两优288的选育
短句来源
    STUDIES ON THE HETEROSIS OF TWO-LINE HYBRID RICE Ⅱ. ANALYSES OF PHYSIOLOGICAL AND BIOLOGICAL CHARACTERS
    两系杂交水稻杂种优势研究 Ⅱ.生理和生物学基础分析
短句来源
    Study on Classification of Crosses and Their Parents by RFLP Markers in Two-line System Hybrid Rice
    利用RFLP标记对两系杂交水稻及其亲本的分类研究
短句来源
    A Study on the Relation of Combining Ability in Main Traits of two line System Hybrid Rice and Parental Indica japonica Differentiation
    两系杂交水稻主要性状配合力与亲本籼粳分化关系的研究
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  line hybrid rice
A comparative study on the photosynthetic parameters among intergeneric progenies derived fromOryza sativa L.×Sorghum vulgare L., its maternal parent Gui 630 and commercial 3-line hybrid rice Shanyou 63 in pot experiment in greenhouse was conducted.
      
Several two-line hybrid rice crosses using this system are under development.
      
Strategy and utilization of a herbicide resistance gene in two-line hybrid rice
      
Super-rice hybrids are two-line hybrid rice cultivars with 15 to 20 % higher yields than the raditional three-line hybrid rice cultivars.
      
The three-line hybrid rice system was invented in 1973 and then production of hybrid rice began in 1974.
      


An investigation of the protein content of 22“two-line” bybrid(the F_1s of crosscombinations with nuclear male sterile lines as the maternal parents and fertility restorers asthe pollen parents)rice varieties and their parents and a correlation analysis of the data ob-tained showed thatgrain protein content of the sterile line exerted a positive effect on theprotein content of the F_1s while the effect of the pollen parent and the mean value of thetwo parents appeared to be negative.It is recommended that in”two-line”...

An investigation of the protein content of 22“two-line” bybrid(the F_1s of crosscombinations with nuclear male sterile lines as the maternal parents and fertility restorers asthe pollen parents)rice varieties and their parents and a correlation analysis of the data ob-tained showed thatgrain protein content of the sterile line exerted a positive effect on theprotein content of the F_1s while the effect of the pollen parent and the mean value of thetwo parents appeared to be negative.It is recommended that in”two-line” breeding forhigher protein content,nuclear male sterile lines with high protein content be used as thematcrnal parent and parents with high specific combining ability for protein content bechosen for the cross combinations.

对22个“二系”杂交水稻杂种一代及其亲本的蛋白质含量的研究表明,母本蛋白质含量对杂种一代有正向作用,而父本以及双亲平均值均呈负向作用,居中组合较少。在水稻“二系”育种中,应利用蛋白质含量较高的核不育两用系作母本,并选择对蛋白质含量有较高特殊配合力的父母本配组,才可能育出有较高蛋白质含量的“二系”杂交稻。

Compared with three-line hybrid rice, two-line intersubspecieshybrid rice (TLIHR) has more grains per ear and a higher proportion of empty-unfilled grains (EUG). Degrees of grain plumpness vary with the TLIHRcombinations. Combinations with stronger carborn assimilation ability, slowersenscence speed and smaller sink capacity have lower proportion of EUG. It issuggested that big capacity with source shortage was one of the main physiologi-cal factors for the higher EUG proportion of TLIHR. Measures of improvingsource,...

Compared with three-line hybrid rice, two-line intersubspecieshybrid rice (TLIHR) has more grains per ear and a higher proportion of empty-unfilled grains (EUG). Degrees of grain plumpness vary with the TLIHRcombinations. Combinations with stronger carborn assimilation ability, slowersenscence speed and smaller sink capacity have lower proportion of EUG. It issuggested that big capacity with source shortage was one of the main physiologi-cal factors for the higher EUG proportion of TLIHR. Measures of improvingsource, flow and sink relationship are discussed.

与“三系”杂交水稻比较,两系亚种间杂交水稻穗大粒多,库容优势明显,空秕率高,不同的两系亚种间杂交水稻组合,籽粒充实状况不同。其中碳素同化能力比较强,衰老速度比较慢、库容比较小的组合,空秕率比较低。因而认为库大源不足是导致两系亚种间杂交水稻高空秕率的重要生理原因之一。并讨论了提高两系亚种闻杂交水稻源、流、库协调程度的措施。

The key of the seed production in two——line hybrid rice is selection ofthe theoretical heading and flowering periods.In the periods the fertility alt-erations of the Dual-purpose Genic Male——sterile line need specially light andtemperature conditions.the definition on difference of the paternal and ma-ternal sowing time is essential conditions of parental flowering period meet-ing.If the high yield of the seed production,the rates of cross seed——settingwere been increased,owing to the self mix in two—line hybrid...

The key of the seed production in two——line hybrid rice is selection ofthe theoretical heading and flowering periods.In the periods the fertility alt-erations of the Dual-purpose Genic Male——sterile line need specially light andtemperature conditions.the definition on difference of the paternal and ma-ternal sowing time is essential conditions of parental flowering period meet-ing.If the high yield of the seed production,the rates of cross seed——settingwere been increased,owing to the self mix in two—line hybrid rice plant,mix—preventing and purity—preserving is the focal points of the seed prod-uction.

系杂交水稻制种能否成功,选择抽穗开花期是关键;确定父母本播差期是保证花期相遇的基本条件;制种能否高产,应以提高异交结实率为主攻方向,而两系杂交稻制种的难点在于防杂保纯.

 
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