雜種優勢育種 的英文怎麼說

中文拼音 [zázhǒngyōushìyùzhǒng]
雜種優勢育種 英文
breeding for heterosis
  • 雜 : Ⅰ形容詞（多種多樣的; 混雜的） miscellaneous; varied; sundry; mixed Ⅱ動詞（混合在一起; 攙雜） mix; blend; mingle
  • 種 : 種名詞（姓氏） a surname
  • 勢 : 名詞1 （勢力） power; force; influence 2 （一切事物力量表現出來的趨向） momentum; tendency 3 （自...
  • 育 : 育動詞1. （生育） give birth to 2. （養活; 培育） rear; raise; bring up 3. （教育） educate
  • 雜種 : [生物學] hybrid; crossbreed; intercross; [遺傳學] random breed; [動物學] half bred; 雜種不育性 hy...
  • 育種 : breeding
  1. Where the ranges of two species overlap, and fertile hybrids can be produced, these hybrids will tend to backcross with the most abundant species, so the offspring down many generations come to resemble the most abundant parents

    兩個物種的重合個體或是那些可育雜種將趨向于與優勢種進行回交，因此，經過很多代之後，所得個體會與優勢種的親代相似。
  2. The self - incompatibility characteristics and heterosis breeding on rape

    油菜的自交不親和性和雜種優勢育種
  3. Study on heterosis and combining ability of male sterile system of hexaploid triticale with t. timopheevi cystoplasm

    型細胞質雄性不育體系雜種優勢與配合力的研究
  4. Directed on the present situation and existing problems in boosting beef cattle industry based on the yellow cattle improvement in china, the review indicated that several relationships, such as integration of individual households and large scale cattle farms, integration of yellow cattle improvement, crossbreeding, breed conservation and utilization, integration of high grain diet intensified fattening and low grain diet economic fattening, should be handled properly ; and the requirements of profitable cattle industry for increasing reproductive survive rate, using hybrid vigor and improving the weight gain, the main factors affecting economic return of large scale cattle farms and the technology level improvement in cattle industry were duiscussed as well

    本文就近來我國以黃牛改良為特點的肉牛業蓬勃發展現狀與存在問題，指出應處理好養牛經營形式千家萬戶與規模牛場相結合、黃牛肉用與肉役兼用相結合、黃牛改良選育與雜交、保種及利用相結合、高精料強度肥育與低精料適度育肥相結合等幾個問題；並就提高養牛經濟效益對提高繁殖成活率、充分利用雜種優勢、提高日增重的要求和影響規模牛場經濟效益的主要因素及如何提高養牛科技水平等問題提出探討。
  5. Twenty f1 combinations crossed among 5 varieties and strains different in fiber properties according to complete diallel crossing design were used to evaluate the heterosis and gene action of boll weight and lint percentage in high quality fiber property varieties in upland cotton in 1998 1999 for two year successively at nanjing. it was indicated that there existed small interactions with the environmental factors without maternal effects and the additive gene effect was in chief, attaining to 51. 2 % and 65. 4 % respectively for boll weight and lint percentage. the dominant effect was also in higher rate, 32. 6 % and 16. 8 % respectively. the population mean heterosis of boll weight and lint percentage over the mid - parental mean were relatively prominent 13. 3 % and 3. 5 % respectively in extreme significance. however, boll weight showed no significantly surpassing parental f1 heterosis over the better parent based on population mean ( 2. 0 % ) ; while the lint percentage expressed significant negative heterosis value ( - 2. 1 % ). the gene actions were in conformity with the heterosis expression. it was shown clearly that the f1 combinations crossed between parents with similar performances had relatively high dominant effects and significant positive f1 surpassing parental heterosis ( f1 heterosis over the better parent ) ; while no f1 combination crossed between the parents with prominent mutual difference surpassed the higher parent in yield components, which indicated that among those parents with less difference and close relationships, there still existed sufficient genetic variation or certain mechanism for creating variation and achieving greater advances in breeding. correlation analyses also indicated that there still existed severely undesirable negative correlation between yield and fiber properties as well as the difficulties for their simultaneous improvements

    利用5個具有不同纖維品質性狀的品種（系）配製完全雙列雜交組合20個，通過親本和f1的2年隨機區組試驗發現產量性狀的鈴重和衣分與環境的互作效應小，不存在母體效應，並以加性遺傳效應為主，分別占表型方差的51 . 2 %和65 . 4 % ;顯性遺傳效應所佔的比率也較高，分別為32 . 6 %和16 . 8 % .鈴重和衣分的群體平均優勢較大，分別為13 . 3 %和3 . 5 % ，達到了極顯著;鈴重的超親優勢為2 . 0 % ，不顯著;衣分為顯著的負值（ - 2 . 1 % ） .遺傳分析與雜種優勢結果一致.具體表現在產量性狀上，親本相當配製的組合雜合顯性較高，其超親優勢正向顯著，而極值親本（差異較大）所配組合沒有超過高親的.這表明親本差異小、親源關系較近的親本中仍然存在足夠的遺傳變異或某種機制以創造變異使育種取得更大的進展.相關分析表明了仍然存在嚴重的品質與產量的負相關，遺傳改良的難度較大
  6. The results indicated that opposite maize had widespread heterosis like alternative maize ; yield advantage of opposite f1 ( alternative alternative ) was better than that of f1 ( opposite opposite ) and f1 ( alternative opposite or reverse ) ; general combining ability of yield characters was decreased by opposite characters transfer maize, but alternative maize with opposite genes has high general combining ability, so that on the opposite maize breeding, alternative inbred lines with different opposite genes can be parents for breeding hybrid lines ( alternative alternative ) and hybrid varieties with more seeds and high yield can be obtained

    結果表明：對生玉米同互生玉米一樣具有普遍的雜種優勢，在產量性狀上f1對生株優勢互互組合大於對對組合和對互（互對）組合；對生性狀的轉育對產量性狀的一般配合力有降低效應，而含有對生基因的互生玉米具有較高的一般配合力效應，因此，在對生玉米育種中可以利用含有不同對生基因的互生自交系作親本來組配雜交組合（互互） ，從而獲得較高的制種產量和高產的對生雜交種。
  7. Cytoplasmic male sterility ( cms ) is of tremendous importance in plant breeding

    摘要細胞質雄性不育的研究在雜種優勢利用上具有重要的實踐意義。
  8. The results indicated that as the intensity of sward cleavage increased, elymus nutans and other plants that had high requirements in soil aeration and resource space presented an increased competitive edge and the species that had low requirements in soil aeration and resource space presented an opposite picture ; low - intensity sward cleavage could help increase species diversity to a certain extent, but the diversity index appeared to decline as a whole as the cleavage intensity increased ; the effects of sward cleavage on functional groups of the vegetations showed in such manner as e. nutans - represented grasses increased in their composition with the intensity of sward cleavage raised, and sedges and forbs decreased in their compositions with the intensity of sward cleavage raised ; sward cleavage showed a significant improving effect on primary productivity of the meadows and was capable of increasing the proportion of quality - grass biomass to the total plant biomass ; sward cleavage could be independently employed as an effective measure to rehabilitate and improve alpine - meadow grasslands and thus played a basic and key role in the technical combination aiming at establishing hay fields characterized by e. nutans

    結果表明：垂穗披堿草等對土壤通透性和資源空間要求較高的物種，競爭力隨劃破強度的增加而上升，而對土壤通透性和資源空間要求相對較低的物種則相反；輕度劃破干擾對提高物種豐富度具有一定的促進作用，但多樣性指數則總體上表現為隨劃破強度的增加而呈下降的趨勢；劃破干擾對植被功能群的影響表現為以垂穗披堿草為代表的禾草類組分隨干擾強度的增加而顯著上升，莎草類和雜類草組分隨干擾強度的增加而顯著下降；劃破干擾對草地初級生產力的提升具有顯著的促進作用，且可顯著增加植物總量中優質牧草的比重；劃破干擾可獨立作為高寒草甸類草地恢復與改良的有效措施，在定向培育垂穗披堿草型割草場的技術組合中具有核心和基礎性的地位。
  9. Brassica crops occupy the largest cultivated areas and produce the highest yields among the vegetables and oil crops in our countryside. it is one of the most prevalent crops in the utilization of heterosis and have been regarded as model plants in the process of researches on their molecular mechanism of self - incompatibility and breeding and application of male sterility

    蕓薹屬植物（ brassica ）是我國栽培面積最大，產量最高的一類蔬菜與油料作物，在我國蔬菜和油料生產和供應中佔有極其重要的地位，蕓薹屬作物也是雜種優勢利用最為普遍的一類作物，其自交不親和性的分子機理和雄性不育系的選育及其應用基礎的研究深受人們重視。
  10. Abstract ： the progress in studies on induction of male sterili ty and restorer line in plant by gene engineering was reviewed. the prospects on application of this method in heteriosis utilization were discussed

    摘要本文對利用基因工程創造植物雄性不育系和恢復系的研究進展進行了綜述，並對其在雜種優勢利用中的應用前景進行了展望。
  11. Effects of opposite character on heterosis of yield characters and heredity of combining ability were studied by using inbred lines and hybrid combinations of opposite and altefive, which were bred through opposite gene transfer in maize

    摘要本文利用對生基因轉育獲得的對生與互生自交系及其雜交組合，研究了對生性狀對產量性狀雜種優勢和配合力的遺傳效應的影響。
  12. Much attention, for which, has been paid to the research of male sterility mechanism and its application in it inthe past several decades

    白菜雜種優勢十分明顯，其雄性不育系利用一直被認為是目前一代雜種生產的理想途徑，因而，有關其雄性不育發生的機理研究一直深受人們的重視。
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