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1)  Quardrispecific hybrid
四元杂种
1.
The results showed that the meiosis of the quardrispecific hybrid F1 was abnormal, and some of the chromosomes were lost in most PMC.
用(亚洲棉×草棉)F1进行染色体加倍,再与(陆地棉×海岛棉)F1进行杂交,产生亚洲棉、草棉、陆地棉和海岛棉四元杂种
2.
bickii)] and its reciprocal cross,as well as their backcross progenies, of the quardrispecific hybrid with A, D, G genomes were studied.
对棉属 A、D、G三个染色体组合成的三元杂种 [陆地棉× (亚洲棉×比克氏棉 ) ]及反交和回交后代 ,四元杂种 [(亚洲棉×比克氏棉 )× (陆地棉×夏威夷棉 ) ]进行了细胞学研究。
2)  tetra hybrid
四元杂交种
1.
Report on breeding of summer autumn tetra hybrid variety Xin·Feng×Qin·Yun and its rearing performance.;
夏秋用蚕四元杂交种“新丰×青云”的选配和试养
3)  quadruple cross hybrid
四杂交杂种
4)  Tetrageneric hybrid
四属杂种
1.
Tetrageneric hybrids involving Triticum,Agropyron,Haynaldia and Secale were produced by using embryo culture.
通过胚培养产生了小麦-偃麦草-簇毛麦-黑麦四属杂种。
5)  quaternary hybrid
四祖杂种
6)  double cross combination
四元杂交
1.
Comparative studies on the performance of Taihu pig double cross combinations and that of Duroc×(Landrace×Large Yorkshire) three-way cross combinations;
太湖猪内四元杂交组合与外三元杜长大组合比较试验
2.
Experiment for comparing the performance of Erhualian pig double cross combinations and that of Durocx(LandracexLarge Yorkshire) three-way cross combination;
二花脸猪四元杂交组合与杜长大三元杂交组合比较试验报告
补充资料:1,3,5,7-四甲基四乙烯基环四硅氧烷
分子式:[CH3(CH2=CH)SiO]4
CAS号:

性质:沸点224~224.5℃(101.06kPa)。熔点-43.5℃±0.1℃。相对密度0.9875。折射率1.4342。与八甲基环四硅氧烷性能相似,在微量硅醇钠、硅醇钾或少量浓硫酸作用下,Si-O-Si键断裂重排,生成直链的聚硅氧烷和环状硅氧烷的混合物。  Si-CH=CH2键在有机过氧化物存在下,可进行游离基聚合反应。在铂催化剂存在下,可与Si—H键发生加成反应。可由甲基乙烯基二氯硅烷的水解料催化裂解来制取。用来合成有机硅中间体及高分子化合物提供活性交联点之用,是制备硅橡胶不可缺少的原料之一。

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