近交系雜種 的英文怎麼說

中文拼音 [jìnjiāozhǒng]
近交系雜種 英文
inbred hybrid
  • : Ⅰ形容詞1 (空間或時間距離短) near; close 2 (接近) approaching; approximately; close to 3 (親...
  • : Ⅰ動詞1 (把事物轉移給有關方面) hand over; give up; deliver 2 (到某一時辰或季節) reach (a cert...
  • : 系動詞(打結; 扣) tie; fasten; do up; button up
  • : 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
  • : 種名詞(姓氏) a surname
  • 雜種 : [生物學] hybrid; crossbreed; intercross; [遺傳學] random breed; [動物學] half bred; 雜種不育性 hy...
  1. 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)配製完全雙列組合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、親源關的親本中仍然存在足夠的遺傳變異或某機制以創造變異使育取得更大的進展.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
  2. After selected various high yielding and hybrid varieties, their nutrient uptake pattern, interaction among fertilizer, varieties and plant density should be investigated

    年來,我國選育出一批主要作物的高產品,應當研究它們的需肥特性,研究施肥與這些新品及其植密度等不同措施的關
  3. In summary, the exotic species can affect native bird species in four main ways, 1 ) predation of birds or eggs by the exotic mammals ; 2 ) competition for habitats and foods with exotic birds, and loss of genetic diversity by hybridization with the closely - related exotic species ; 3 ) direct and indirect alterations of native habitats and food resources, and predation by the exotic invertebrates ; and 4 ) loss and fragmentation of habitats for native birds through altering species composition and structure of native plant communities by exotic plants

    外來生物對鳥類的影響主要表現在以下幾方面: ( 1 )外來哺乳動物對成鳥、幼鳥或鳥卵的捕食作用; ( 2 )外來鳥類與本地鳥類競爭棲息地和食物資源,與當地的而造成基因流失; ( 3 )外來無脊椎動物改變本地鳥類的棲息環境和食物狀況,甚至直接捕食本地鳥類; ( 4 )外來植物入侵改變入侵地的植物群落組成和結構,造成本地鳥類的棲息地喪失或破碎化,並通過改變入侵地生態統的食物鏈結構而對高營養級的鳥類產生影響。
  4. The yeast two - hybrid system is an effective method for the study of protein - protein interaction in recent years. it is widely used in the study of life science because it provides a genetic means of identifying proteins that physically interact in vivo

    酵母雙統是年來發展起來的一研究蛋白質?蛋白質相互作用的有效方法,由於它檢測的是一體內的相互作用,自這一統建立以來,就被廣泛地應用於生命研究的各個領域。
  5. Thus, it is difficult to find the voltage reference for the harmonic analysis. since acem are always operated near to the synchronous speed, the frequency of the excited voltage is very low, even to zero. therefore, this is the power harmonic suppression study of a complicated power supply system, in which the about harmonic general theories and methods are all inapplicable

    現代流勵磁電機( acem )採用電力電子變流器作為勵磁裝置,其勵磁電壓諧波含量豐富,難于獲得諧波分析所需的電壓基準,同時流勵磁電機經常工作在同步轉速附,致使勵磁電壓頻率極低甚至為直流,通常的諧波檢測方法和理論都無法適用,因而這是一目前尚未深入探討過的復供用電統電力諧波抑制問題的研究。
  6. In part one, after japan ' s twice oil crises, it draws its own energy strategy and described the rupture of petroleum pipeline between china and russia. it analyses the background of the cooperation between japan and russia ; in part two, in recent years, there being scrambles for petroleum pipeline among china ? japan and russia, the author sets force its own position and benefits on this question of each side and points out the reflection of the complicated international tense situation and the commercial benefits ; on part three, the author points that japan ' s energy diplomatic strategy and northeast asia strategy. on part four, analyzing the advantages and disadvantages, the author sets force the effect and prospects of the japan and russia ' s energy cooperation to northeast asia

    第一部分在簡要介紹日本兩次石油危機之後的戰略形成及在日、中、俄圍繞能源合作問題中,由於日本半路殺出,導致中俄輸油管線初步協議破壞,這是日本與俄羅斯進一步加強能源合作的原因;第二部分對年來日?中?俄油氣管道之爭,深入闡述並分析各自所持立場,並指出這大國之間的較量充分反映了當今國際社會復的地緣政治關和商業利益格局;第三部分從能源和地緣戰略角度進一步指出日本對俄羅斯能源外戰略及對東北亞戰略的關;第四部分從分析東北亞區域能源合作有利和不利因素出發,闡述日俄能源合作對東北亞地區的影響及前景展望。
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