parental gene 中文意思是什麼
parental gene
解釋
親本基因-
In advanced breeding programs, parental differences and variability in hybrid progeny may largely reside in multiple gene systems.
在當代的育種計劃里，親本的差異和雜種後代的變異，可能絕大部分都屬于多基因系統。 -
Shaking flask experiments and hplc analyses showed that 99 isolates still produced four components of avermectins b, in which the yields of avermectins b in 82 isolates were only about 0. 1 ~ 2 % of those produced by the parental strain olm73 - 12. 2 of 82 isolates were confirmed to be the correct gene replacement mutants by pcr and sequence analysis. the mutant only producing avermectins bl was not detected
搖瓶發酵和hplc分析結果表明，有99個突變株仍然產阿維菌素b的4個組分，其中82株的發酵單位很低，僅為出發菌株olm73 - 12的0 . 1 2 ，從中挑取2株經pcr擴增和測序驗證，均發生了正確的基因取代；沒有檢測到僅產b1的突變株，這表明阿維菌素b2組分的產生並不是因為阿維菌素pks上dh2的部分活性所造成。 -
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 -
To facilitate the detection of gene replacement, apr gene was placed in the middle of the two inserts. orit from e. coli plasmid rk2 was also incoporated into the vector, therefore, pij903 derivatives can be mobilized from e. coli into streptomyces sp. fr - 008 by either bi - parental conjugation or by conjugation between streptomyces
為了在克隆完整基因簇時避免這兩方面的影響並能隨機地獲得dna大片段，我們將第二代yac載體pjs97 - pjs98改造成為適合於在白林泉鏈黴菌基因組中dna大片段的基因置換與克隆鏈黴菌中分析被克隆大片段功能的基因置換載體。 -
The recombinant vector pbi121 containing si gene of ibv was confirmed by pcr and double digestion of restriction endonuclease. agrobacterium fumefaciens eha105 with the recombinant vector pbi121 was obtained by tri - parental mating method
用三親交配法將重組克隆導入根癌農桿菌，獲得了含pbi121重組質粒的eha105農桿菌菌株。 -
Howeer, uniparental es cell research faces the biological hurdle of genomic imprinting, in which specific gene expression patterns are dictated by the parental origin
然而，單系胚胎幹細胞研究面臨著基因組印跡的生物學障礙，即特殊的基因表達模式受原始親代的控制。 -
6 isozymes were analyzed in the two parental populations, including their locus number 、 structure 、 alleles etc, altogether 18 gene loci and 28 alleles were recorded
結果表明引進的日本種群的遺傳多樣性較中國種群豐富，將其作為引進種用於資源改良是可行的。 -
Genomic imprinting refers to parent - of - origin - dependent gene expression. the presence of imprinted gene can cause cells with a full parental complement of functional autosomal genes to specifically express one allele but not the other, resulting in monoalielic expression of imprinted loci
基因組印記是指一種依賴于親本的基因表達形式，它導致常染色體上的功能基因單一表達一個等位基因而不表達另一個等位基因，造成印記位點的單等位基因表達。
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