親本群體大小 的英文怎麼說

中文拼音 [qīnběnqúnxiǎo]
親本群體大小 英文
parental population size
  • : i 名詞1 (草木的莖或根)stem or root of plants 2 (事物的根源)foundation; origin; basis 3 (本錢...
  • : Ⅰ名詞(聚在一起的人或物) crowd; group Ⅱ量詞(用於成群的人或物) group; herd; flock
  • : 體構詞成分。
  • : Ⅰ形容詞1 (體積、面積、數量、強度等不大) small; little; petty; minor 2 (年紀小的; 年幼的) youn...
  • 群體 : 1. [生物學] population; colony2. [社會學] group
  1. This paper concerns studies on rhizobia in symbiosis with important legume soybean and peanut crops in china, following : 1 ) summarized bio - diversity of rhizobia, including indigeneous population, isolation frequency, strain type, distribution, and strain - host promiscuity and compatibility from large and small samples. 2 ) reviewed symbiont improvement in both sides of rhizobia and hosts, involving selection of effective rhizobial strains, evoluation and utilization of the host germplasm for symbiotic properties, and selection of the both sides for special characters. 3 ) discussed the subject on the rich symbiont germplasm resource in china and on further research being necessary to exploitation and utilization of the benificial germplasm

    針對我國主要豆科作物豆和花生的研究成果,並結合身研究工作內容, ( 1 )總結了與宿主共生的根瘤菌生物學多樣性,包括的土著根瘤菌數量、分離頻率、類型與分佈及其菌株宿主共生混交性與和性; ( 2 )評述了根瘤菌宿主植物共生雙邊固氮改良,包括優良菌株的選育、宿主品種資源共生特性的評價與利用及特異性狀的選擇; ( 3 )討論了我國這一類共生資源的豐富性以及有必要進一步加力度研究有益資源的開發和利用的問題。
  2. Abstract : this paper concerns studies on rhizobia in symbiosis with important legume soybean and peanut crops in china, following : 1 ) summarized bio - diversity of rhizobia, including indigeneous population, isolation frequency, strain type, distribution, and strain - host promiscuity and compatibility from large and small samples. 2 ) reviewed symbiont improvement in both sides of rhizobia and hosts, involving selection of effective rhizobial strains, evoluation and utilization of the host germplasm for symbiotic properties, and selection of the both sides for special characters. 3 ) discussed the subject on the rich symbiont germplasm resource in china and on further research being necessary to exploitation and utilization of the benificial germplasm

    文摘:針對我國主要豆科作物豆和花生的研究成果,並結合身研究工作內容, ( 1 )總結了與宿主共生的根瘤菌生物學多樣性,包括的土著根瘤菌數量、分離頻率、類型與分佈及其菌株宿主共生混交性與和性; ( 2 )評述了根瘤菌宿主植物共生雙邊固氮改良,包括優良菌株的選育、宿主品種資源共生特性的評價與利用及特異性狀的選擇; ( 3 )討論了我國這一類共生資源的豐富性以及有必要進一步加力度研究有益資源的開發和利用的問題。
  3. 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,不存在母效應,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 % .鈴重和衣分的平均優勢較,分別為13 . 3 %和3 . 5 % ,達到了極顯著;鈴重的超優勢為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.具表現在產量性狀上,相當配製的組合雜合顯性較高,其超優勢正向顯著,而極值(差異較)所配組合沒有超過高的.這表明差異源關系較近的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
  4. This thesis suggests a process considered minimizes the population size as similar individuals occur in the fitter members of the population, which helps reduce the execution times for ga by removing the redundancy associated with the saturation effect found in the later generation. this thesis uses a method that adds dynamic penalty terms to the fitness function according to the optimal degree of solutions, so as to create a gradient toward a feasible suboptimal or even optimal solutions. on the basis of the difference of the biggest and the smallest of fitness of individual, modifying the fitness function in order to convergence is a satisfaction

    動態調節種,去掉遺傳演算法在迭代後期搜索產生的過多相似個,達到減少計算時間的目的;按照解的優劣程度給適應度函數增加一個在ga搜索過程中動態改變的可變罰函數,給搜索最優解創造一個梯度,使遺傳演算法收斂到可行的較優解或最優解;根據適應度值最和最的差修正適應度函數,使適應度函數值適中不容易造成收斂太快、局部收斂或根不收斂而變成隨機搜索;為了避免「近繁殖」採用競爭擇優的交叉操作;利用并行遺傳演算法的思想,提出一種自適應多子種進化策略;提出人口汰新政策來解決類似甚至相同的個的情況發生。
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