1) distant hybridization
远缘杂交
1.
Genetic constitutions of distant hybridization offsprings between Oreochromis aurea(♀)×Siniperca chuatsi(♂);
奥利亚罗非鱼(♀)×鳜(♂)远缘杂交子代的遗传结构
2.
Study on Selection and Breeding of Distant Hybridization Cotton Variety Shiyuan 321;
远缘杂交棉花品种石远321的选育研究
3.
The Integrated Analysis on Distant Hybridization Cotton Variety Shiyuan321;
远缘杂交棉花新品种石远321的综合分析
2) Wide hybridization
远缘杂交
1.
Observation were made on the fertilization and embryo development in wide hybridization between Triticum aestivum L.
本文还报道了小麦与节节麦远缘杂交时雌雄性核的结合及杂种胚和胚乳的发育情况，探讨了小麦与节节麦杂交结实率低在胚胎学方面的原
2.
Wide hybridization is a most widely used technique in crop breeding programs.
植物远缘杂交是作物育种中广泛应用的技术。
3.
The wide hybridization was one of the important approaches to create new species.
远缘杂交是创造新物种的重要途径之一，通过远缘杂交的手段可以综合亲本种的适应性，创造出新的适应性，丰富基因库、拓宽生存环境，进而促进基因组进化和新物种形成。
3) Distant crossing
远缘杂交
1.
Study on heterosis of protein content of distant crossing between maize inbred line and Zea.luxurians;
玉米自交系×大刍草远缘杂交蛋白质含量杂种优势研究初探
2.
Analysis of high molecular weight glutenin subunit in offspring of distant crossing;
小麦远缘杂交后代的高分子量谷蛋白亚基分析
3.
Tasseling and silking times,pollen-dispersing,plant heights,heights to ear position and tillers of the F_1,F_2 as well as the backcross progenies were investigated to study the genetic variations of agronomic traits in the progenies of distant crossing.
采用人工剥苞多次授粉方法,将近缘一年生二倍体类玉米(大刍草)与普通玉米自交系杂交,对F1、F2以及回交后代B 1的抽雄期、吐丝期、散粉期、株高、穗位高、分蘖进行调查研究,分析远缘杂交后代农艺性状的遗传变化。
4) distant cross
远缘杂交
1.
Distant cross is an effective method creating new specses,new germplasm and transfering exogenous gene in biological bodies.
远缘杂交是创造生物新物种和新种质以及转移遗传物质的有效途径 ,在理论和实践上都有重要意义。
2.
years successive observation on progenies of a distant cross of upland rice Han 65( Oryza sativa) ×Long\|awn\|barnyard\|grass( Echinochloa caudata), a summer dominant native grass showed that.
)为母本 ,稗草长芒稗 (Echinochloacaudata)为父本进行远缘杂交 ,获得实粒种子。
5) wide cross
远缘杂交
1.
The breeding techniques on the wide cross of the Orchidaceae six genera,mainly six species of Cymbidiums were studied and four kinds of hybrid seedlings were fostered.
选择了兰科六个属的兰花为试材,并以兰属的六个种为重点进行远缘杂交育种技术研究,培育出了四个杂交种试管苗。
2.
Investigations were carried out on the wide cross of Chinese orchids and the germination of their hybrid seeds using the orchids of Cymbidiums, Phalaenopsis and Oncidium as materials.
以兰属、文心兰属、蝴蝶兰属的兰花为材料 ,对中国兰花远缘杂交及其杂交种子的萌发进行了研究 ,结果表明 :(1)国兰类各种间杂交易成功 ,结果率在 80 %以上 ;(2 )墨兰和大花蕙兰杂交 ,结果率和杂交种子数量随品种和正反交不同而异 ;(3)兰属和其他属兰花杂交 ,结果率较低 ,且产生的杂交种子量很少 ;(4 )兰花杂交种子萌发形成的中间繁殖体的种类和数量 ,随杂交组合不同而不同 ,墨兰和大花蕙兰的杂交种子萌发后形成原球茎 ,其余组合产生根状茎 。
3.
According to our many years wild hybriding practices and the special ecology climate condition of Guizhou,We hypothesized that interaction between ecological environment and glycoprotein induced wide cross fertility.
远缘杂交是创造新物种、新种质以及转移异源遗传物质的有效途径, 在理论和实践上都具有重要意义。
6) distant hybrids
远缘杂交种
1.
Stem callus cultures of wild Vitis quinquangularis and its distant hybrids 213, 741, 196, 296 and B2 were used to study the effects of various basal media (MS, 1/2MS and GS) supplemented with different proportions of growth regulators (6-BA 1.
1mg/L两组植物生长调节剂,对野生毛葡萄及其远缘杂交种后代213、741、196、296、B2 等6个品种(种类)进行茎段腋芽萌发离体培养试验。
2.
According to observe and analyze of dioecism characteristic in Vitis quinquangularis Rehd and study on the development of male and female gametophytes, fertilization of Vitis quinquangularis Rehd and distant hybrids to fructification domino offect, prove up.
本论文通过对毛葡萄雌雄异株特性、毛葡萄及远缘杂交种大小孢子发生、雌雄配子体发育和传粉适应性对结实效应开展研究，从而探明毛葡萄及远缘杂交种有性生殖机理，找出毛葡萄座果率低的原因，为制订提高毛葡萄座果率的技术措施以及开展毛葡萄杂交育种提供理论依据和应用基础。
补充资料：远缘杂交
| 远缘杂交 distant hybridization 不同种间、 属间甚至亲缘关系更远的物种之间的杂交。可以把不同种、属的特征、特性结合起来，突破种属界限，扩大遗传变异，从而创造新的变异类型或新物种。由于远缘杂交往往重演物种的进化的历程，故也是研究生物进化的重要实验手段。远缘杂交一般不易结实，即使结实，杂种也通常不育或夭亡，杂种后代分离幅度大，分离世代长且不易稳定。远缘杂交在育种上的意义主要是：创造新物种、改良旧物种、创造和利用杂种优势。 获得远缘杂种通常要克服3方面的困难：①杂交不亲和性。可根据具体情况分别采用：广泛测交；改变授粉方法；预先无性接近法；媒介法；改变亲本染色体的倍数性；理化因素处理，或其他方法克服。②杂种夭亡或不育。由于远缘亲本在遗传、生理上的巨大差异，即使克服了受精过程的障碍，在胚乳植物中还可能出现胚与胚乳之间发育不协调以致幼胚败育。可采用杂种幼胚离体培养解决。造成杂种不育的原因多半是由于来自双亲的异源染色体不能正常配对，破坏了减数分裂的正常进程和大小孢子形成。利用秋水仙碱处理杂种使染色体加倍，不仅可克服杂种不育，还可创造新种。通过延长生育期、改善营养条件等措施对克服杂种夭亡、提高杂种育性，有时也有一定作用。③疯狂分离。由于来自双亲的异源染色体不能互相配对而形成大量单价染色体，在连续几个世代的配子形成过程中，随机分散到杂种后代的细胞内，形成多种多样的性状变异。解决办法是染色体加倍或回交。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条