育性變異 的英文怎麼說
中文拼音 [yùxìngbiànyì]
育性變異
英文
fertility variation-
There is adequate variability in plants to breed for resistance to certain aphid vectors.
植物有充分的變異性可用於培育對一些蚜蟲介體的抗性。This paper summarized the inheritance and variation of main biological and economic characters in rape progeny from hybridization and distant crossing, inquired into the selective mating of hybrid parent and the selection of hybrid progeny, analyzed the problems which had existed in rape distant crossing breeding, and put forward some ideas for accelerating the stability of characters in distant crossing progeny
概述了油菜品種間雜交後代及遠緣雜交後代主要生物學性狀和經濟性狀的遺傳變異現象；對雜交親本的選配及雜種後代的選擇進行了探討，分析了油菜遠緣雜交育種中存在的問題，就加速遠緣雜種後代的穩定提出了一些見解。Seventeen important morphological characters were analysed to identify and evaluate genetic diversity of morphology of the lespedeza populations. fourteen vital morphological characters were studied using basic statistics, correlation analysis, factor analysis and cluster analysis. zymograms were analysed using eighteen alleles of seven allozymes
對14個關健形態學性狀指標的平均值、方差、標準差、變異系數等基本統計分析表明，胡枝子屬植物不同種間以及種內居群間在這14個重要形態學性狀上的遺傳差異較大，變異系數達28 . 89 122 . 36 （全生育天數除外，變異系數為4 . 72 ） 。The results show that ( 1 ) loops are in general more variable than stems, and in loops a strong adenine bias are observed : ( 2 ) there does not exist a saturation effect in stems, loops or all positions of the 16s rrna gene fragments : ( 3 ) in the molecular cladogram, bagarius forms a sister group with glyptothorax, and euchiloganis forms a sister group with pareuchiloglanis, and exostoma forms a sister group with glyptosternum : ( 4 ) the phlogenetic positions of pseudecheneis, exostoma and glyptosternum are not recognized ; the glyptosternoid fishes are not monophyly although they are defined by 13 osteological apomorphies ; the incongruence of cladograms between molecular and morphological sets may be caused by less informative sites of the 550 homologous sites ; ( 5 ) e. davidi and e. kishinouyei could be the same species according to the genetic distances ; p. sinensis and p. anteanalis could be too
結果表明： （ 1 ）環區平均變異位點較莖區多，有很強的a偏好性； （ 2 ）沒有替代飽和現象； （ 3 ）分子系統樹上?屬和紋胸?屬構成姐妹群，石爬?屬和?屬構成姐妹群， ?屬和原?屬構成姐妹群； （ 4 ） ?屬、原?屬和褶?屬的系統發育位置不定， ? ?魚類並未形成一個單系類群；可能的原因是所得到的16srrna基因片段信息位點太少； （ 5 ）青石爬?和黃石爬?可能是同一物種，中華?和前臀?可能是同一物種。Up to now, extensive biological, chromosomal structure and variation, dna polymorphism, breeding application as well as pest control studies have been conducted. alpha - amylase is a functionally important enzyme for silkworm that feed on mulberry leaves
迄今已對野桑蠶進行了廣泛的生物學上的研究、染色體結構及變異研究、 dna多態性研究、家蠶育種上的應用研究以及作為桑園害蟲防治上的研究。Samples was only 0. 37 which was the smallest among coefficients ; tl, t2, t3 and t4 which came from gaozhuang plantation, mianyang, sichuan, and t5, t6, t7, which came from laohegou planation, mianyang, sichuan, were clustered two groups. the greatly genetic variations in samples of gastrodia elata bl. in different areas and altitude were revealed though the analysis of the tree plot
從總體上看，采自高莊林場的n ， t2 ， t3 ， t4和老河溝采育場的t5 ， t6 ， t7及采自雅安地區的t9 ， t8可以聚為兩大類，說明由於地理分佈和海拔高度的不同，天麻種內的dna存在較大的變異性。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This study was conducted to examine the interrelationship of 10 seed vigor traits in 12 wheat genotypes through variance, co - variance and path coefficient analysis, to determine broad - sense heritability, and to estimate genetic advance under selection. the genotypes showed significant difference for all traits, except for percentage of normal seedling. genetic correlation between conversion efficiency of seed reserve, electrical conductivity with other traits were not significant, showed that selection for any of them might be possible without hampering any other traits. however path coefficient analysis indicated that conversion efficiency of seed reserve, seed reserve utilization ratio have strong direct effect in affecting seedling weight, and that mean germination time has significantly negatively correlated in affecting gi. moderate to high estimates of broad - sense heritability, genetic coefficient of variation and expected genetic advance were obtained for electrical conductivity, germination index, mean germination time, seed dry weigh, seedling dry weigh, seed reserve depletion ratio indicating the possibility for improving these traits
本研究利用12個普通小麥品種對10個種子活力性狀的遺傳變異和相關研究，表明除正常幼苗百分率外，其餘種子活力性狀在品種間均存在顯著的差異.種子貯藏物質轉換效率、電導率兩個性狀間及與其它性狀均無顯著的遺傳相關，因此對他們的選擇不會影響到其它性狀.通徑分析表明幼苗干重主要取決于種子貯藏物質轉換效率、種子貯藏物質利用速率;發芽指數主要由平均發芽時間決定.電導率、發芽勢、幼苗干重、種子干重、發芽指數、種子貯藏物質消耗比率6個性狀表現中到高的遺傳力、遺傳變異系數和相對遺傳進展，指明通過遺傳育種手段改良這些性狀是可能的The results indicated that the most frequent accidents in kindergartens and day care centers are falls, bug bites, vomiting, nosebleeds, and disorientation
我們以次數分配及百分比進行描述性分析；同時也用卡方檢定及變異數分析，來測試不同機構類型在安全教育及意外事件上的差異情形。Average level of pain, health locus of control, numbers of pain site and activities of daily living could predict 46. 96 % total variance on depression ; whereas activities of daily living, average level of pain, pain expression style and educational level could predict 21. 80 % total variance on anxiety
（ 4 ）癌痛病患人口學特性、疾病特徵及健康控制重心在焦慮與憂郁的預測方面，其中平均疼痛程度、健康控制重心傾向、疼痛部位總數及日常生活功能等四個變項可解釋憂郁總變異量的46 . 96 % ；而日常生活功能、平均疼痛程度疼痛表達方式及教育程度等四項可解釋焦慮總變異量的21 . 80 % 。In the core, more than 20 kinds of lithofacies was recognized and more than 6 type microfacies including channel, inter - channel, sheet - like sand, lake and salt lake was distinguished. 2 founding stratigraphy framework through base level analysis four scales cycle was distinguished from the core. very - short term base level cycle is equal to a sediment incident
儲層物性較差，孔隙度多在11 - 13之間，滲透率多小於5毫達西，層內夾層較為發育，層內和層間滲透率差異明顯，滲透率變異數多在0 . 7以上，孔隙喉道細小，以小於0 . 1um的喉道為主。Results of g + c mol % test shown that all slow - growing isolates were belong to the same species. more than 70 % dna - dna homologies were determined among 4 representative strains usda6, and usda110 ( type strains of b. japonicum ). low dna homologies were detected with usda76 ( type strain of b. elkanii )
中l習花生根瘤菌遺傳多樣性和系統發育研究g + cmol %和dna一dna同源性分析結果表明，供試花生根瘤菌代表菌株的tm和g + cmol %均小於種內變異l隔度，表明供試花生根瘤菌均屬j二一個種。Morphological development of ovule - like organ on the leaf and variation characteristics of ginkgo biloba var. epiphylla mak. ohatsuki
葉籽銀杏擬胚珠的形態發育及變異特性Genetic variations in different levels of masson pine ( pinus massoniana lamb. ) in main traits were studied on the basis of the 12 - year - old data of provenance tests at 7 test locations and the 11 - year - old data of plus progenies at 2 test locations, and the index and strategy in different variation levels on selection breeding for pulpwood in masson pine was also discussed
以7個試驗點12年生馬尾松種源試驗林及2個試驗點11年生優樹子代測定林為基礎材料，在研究馬尾松主要性狀不同層次遺傳變異的基礎上，對馬尾松制漿造紙材良種選育目標及在不同變異層次的選擇策略進行了探討。Under the direction of chinese soil taxonomy, part purple soils developed on the purplish standstones of j2 # j3 in sichuan basin were systematically studiedaccording to natural landscape, profile modality and quick - test, applying to methods statistic analysis and system integration, main affecting factors, indexs of soil series taxonomy and retrieval orders were systematically discussed. the results showed : 1 ) organic substance, total nityogen, total phosphate, total potassium and particle size composition were distinctly related with many soil characters. organic substance, calcium carbonate, available phosphate # size composition were much different in all swatches. besides, soil structure and the depth had profound affection to it. 2 ) affecting factors : soil structure, texture style and organic substance phosphorous
本文以土壤系統分類理論為指導，以四川盆地侏羅系蓬萊鎮組、沙溪廟組和遂寧組紫色巖上發育形成的部分紫色土為研究對象，利用spss統計軟體相關功能，結合供試土壤的自然景觀、剖面形態和室內測定的理化性質，對土系分化的影響因子、土系劃分指標和檢索順序進行了系統的探討，結論如下： （ 1 ） 、供試紫色土中有機質、全氮、全磷、全鉀和顆粒組成與多個土壤性質均呈顯著或極顯著相關；有機質、碳酸鈣、有效磷、顆粒組成等性質在供試土壤方差分析中變異系數均較大；土體構型及土體的深度對土壤性質也有深刻影響。Based on the formal measurement table applying the 2 ( superscript nd ) pre - test on 351 students and conducting the examination of the credibility and validity to construct the credibility and validity of the measurement table, the coefficient of inner consistency of individual element in this table was. 673 ~. 892, and the coefficient of re - test after the interval of two weeks was. 697 ~. 930, with the performance of physical education learning to prove the discriminate validity and criterion - related validity, and with the element analysis to examine the construction validity, the sum of variable amount which could be interpreted was 59. 06 %, the outcome showed this table was having good credibility and validity that could provide physical education teachers to realize the learning strategies of university students
以正式量表對351位學生進行第二次預試，再進行信度與效度的考驗，以建構量表的信效度，本量表各因素的內部一致性系數為. 673 ~ . 892與隔二周的重測信度為. 697 . 930 ，以體育學習表現來驗證辨別效度及效標關聯效度，以因素分析考驗建構效度，所能解釋總變異量為59 . 06 % ，結果顯示本量表具有良好的信效度，確實可以提供國內體育教師了解大學生的體育學習策略。Based on the comparative analysis of style, stigma size, pod length and width, pod surface area, seed diameter and dry weight between amphidiploids and their putative diploid ancestors, we observed that some accessions of amphidiploids revealed intermediate state between the two putative parents, others resembled only one of the parents
摘要通過比較分析薹屬多倍體復合種與其祖先二倍體基本種在花柱、柱頭大小、角果長度、寬度、種子直徑及種子干重變化上的異同，發現多倍體復合種在這些發育性狀上表現出處于兩個祖先二倍體親本之間，或只偏向于其中一個祖先親本。" xiyuan4 ", a b. olereacea l. and " 2001817 ", a b. napus l. were bred by southwest agricultural university. here using them as materials, we studied and explored thoroughly the dna and cdna sequences of thl2 gene and mod gene with bioinformatical methods. for the first time, based on sequence data, we analyzed the structure, heredity and variation of the dna sequences encoding thl2 and mod, and foresaw the molecular mechanism in self - incompatibility signal process
本研究以西南農業大學繁育的高度自交不親和的『西園4號』甘藍和『 2001817 』油菜為試材，採用生物信息學的方法全面研究和探索性的分析了thl2基因和mod基因的dna與cdna序列，首次從序列數據出發研究這兩個編碼基因的結構與遺傳變異，以及在自交不親和性信號轉導中的作用機理The seasonal and diel variation in fecundity of females in situ. were observed, and the pattern of spawning and its ecological significance were also discussed. the differences of biochemistry component, respiration, isoenzyme, and total proteins electrophoresis between diapause and subitaneous eggs were preliminarily investigated as well
本文通過對海區雌體現場產卵情況季節性和晝夜性變化的觀察結合海區環境的季節變化，探討其產卵變化的規律和生態意義；還初步研究了剛產出的滯育卵與正常卵的生化成分差異、呼吸代謝特徵、同工酶差異和全蛋白電泳差異。Recently, the sugar beet varieties bred in china are limited in hereditary basis and genetic variation genealogy
摘要目前我國甜菜育成品種存在變異系譜和遺傳基礎狹窄的局限性。分享友人