雜種群 的英文怎麼說
中文拼音 [zázhǒngqún]
雜種群
英文
hybrid population-
Rapd ( random amplified polymorphic dna ) technique was used to study the genetic structure and genetic differentiation of the natural population and the hatchery stock of chlamys farreri. amplifications with 20 10 - base primers under predetermined optimal reaction yielded 153 reproducible amplified fragments ranging from 200 to 3000bp. the mean proportions of polymorphic amplified fragments of natural population and the hatchery stock were 73. 2 % and 70. 6 % respectively, and the mean hetreozygosities of them were 0. 27 and 0. 26 respectively
在對20個野生櫛孔扇貝和20個養殖櫛孔扇貝的基因組dna的檢測中， 20個隨機引物共擴增出153條清晰可分辨的dna片段，片段大小在200 3000bp之間，其中野生種群和養殖群體多態性片段分別為112和108條，多態位點比例分別為73 . 2 %和70 . 6 % ，雜合度分別為0 . 27和0 . 26 。He defines the local population or deme as the group of potentially interbreeding individuals at a given locality.
他說地區的種群或居群是某一地區具有潛在雜交能力的個體的集群。The enormous numbers of field mouses encountered during times of peak populations greatly complicate control.
在種群繁殖高峰期間出現的巨量田鼠使防治問題大為復雜。Individuals crossing exclusively within the same population produce more progeny than those crossing in both directions and thereby use up some of their gametes for the production of inviable hybrids.
完全在同一種群內進行雜交的個體比以兩個方向進行雜交的個體繁殖後代要多，因此為了產生無生機的雜種，就要消耗掉一些配子。The hybrid swarms may become larger and persist indefinitely.
雜種群將逐漸擴大並無限期地持續下去。Gene flow the movement of alleles within and between populations of the same species through interbreeding
基因流動：同一種群內由於雜交或種內選擇使某一等位基因在該種群內擴散。Selfing heterozygotes halves the heterozygosity, and thus outbreeding maintains heterozygosity and produces a more adaptable population
自交雜合子有一半雜合性，因此遠系繁殖可以產生適應能量更強的種群。There is also a general lowering of vigor in inbred stock ( inbreeding depression ), which is especially pronounced amongst normally outbreeding populations
而雜合型出現的頻率降低，因而降低了種群基因的潛在可變性。This may also happen in disturbed areas or in regions where the range of two or more species or even genera overlap, producing hybrid swarms
另外在極其相似物種之間也存在幾乎完全的持續統一體，比如某些種類的蘭花，這種情況在生態被擾亂的地區或兩至多個種甚至屬界限重疊處也有發生，結果會產生雜種群。The research results mainly show : ( 1 ) the ecological degradation characteristics of wuxi county include : some soil is thin and barren and its water and fertility conservation abilities are poor, gradual degradation of soil results in decrease of vegetation diversity and the vegetation community structure gradually inclines tc simplicity from complexity. the types of soil and water loss in wuxi county mainly involve surface erosion and gully erosion. according to investigation, surface erosion area occupies 80 % or so or erosion area, in which the slope farmlands surface erosion area accounts for about 70 % of farmland erosion area
研究結果主要包括： （ 1 ）巫溪縣生態退化特徵表現：作為生物生長基質的部分土壤薄而貧瘠，保水保肥能力差，部分地區基巖裸露，土壤的不斷退化導致植物種多樣性減少，植物種群結構逐步由復雜趨向簡單化；縣內水土流失的類型主要包括面蝕和溝蝕兩大類，據調查，面蝕面積占侵蝕總面積的80左右，其中坡耕地面蝕佔耕地侵蝕面積的70左右。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The obtained results do not support a major gene for body mass index in chinese, the discrepancies between our study and previous studies may result from ethnic difference between chinese and other populations ; the general model provides the best fit to the data, while the environmental model is the second parsimonious model, perhaps due to complex mode of body mass index inheritance ; a moderate heritability estimate is found for body mass index ( h2 = 0. 313 ), lower than that of other populations, this is presumably due to the fact that aside from the influence of genetic bases, body mass index is strongly influenced by environmental factors and that there is a low proportion of obese individuals in samples ( only 4. 1 % individuals have body mass index > 30 )
分離分析的結果表明， （ 1 ）體重指數不存在主基因分離，不同於在其他非中國人群中檢測的結果，說明存在種群差異性； （ 2 ）一般模型提供了最合適模型，環境模型是次之的嚴格模型，可能由於體重指數遺傳模式的復雜性所致； （ 3 ）中國人群中體重指數具有適中的遺傳率（ h ~ 2 = 0 . 313 ） ，低於其他人群中的結果，這是由於體重指數除了受遺傳因素影響外還受環境因素影響及樣本中低比例的肥胖個體（ 4 . 1的個體bmi 30 ）的原因。Reviews on heterotic group partition of maize inbred lines
玉米自交系雜種優勢群劃分的研究綜述The niche proportional similarity and the niche overlap index reflect the niche characteristics of the evergreen broadleaf trees in subtropical forest
結果表明:組成米櫧林群落的優勢種群絕大多數為廣生態位，種群之間關系復雜，對資源具有一定的共享性。Dezhi li, s. takahashi ( 2003 ) particularities of clonal plant species induced by physiological integration. grassland science. grassland science 49 ( 4 ). japan
李德志等（ 2003 ）植物種群生態學與遺傳學分支的成功整合生態學雜志22 （ 6 ） .科學出版社Discussion on population characteristics of pinus massoniana and pinus taiwanensis ' s natural crossbreeds
馬尾松與黃山松天然雜種種群特性探討Analysis on population genetic variation and its correlation to heterosis of body weight using microsatellite dna markers in yellow plumage broilers
黃羽肉雞群體遺傳變異的微衛星分析及其與體重雜種優勢的關系Population genetic structure was studied using rapd analysis to reveal the relationship between the genetic variations and heterosis
同時採用rapd技術對f1代不同群體的遺傳結構進行比較，研究群體內的遺傳變異與雜種優勢的關系。From the randomized initial population, using the operators such as select, crossover and mutation, it can converge the globe optimum solution
從隨機產生的初始種群出發，通過選擇、雜交及變異等遺傳運算元，使種群一代一代地進化到最優解。The polynomial regression showed that the change range of pigment gland density was more wide in hybrid population, our aim was to look for good plant by selecting hybrid
多項式回歸分析結果表明：色素腺體密度在雜種群體中變化范圍較為廣泛，因而對雜種進行選擇，可望得到理想植株。分享友人