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跨长和
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  span length
     The increment of F 1 hybrid over popular variety were higher than 15%, 20%, 5% and 5% for lint yield, fiber strength, span length and fineness.
     高品质系与抗病品系配制的杂交组合 ,F1 皮棉产量较现有推广品种增产 15 %以上 ,比强度提高 2 0 %以上 ,2 .5 %跨长和细度提高 5 %以上。
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     The positive correlation between boll weight and 2.5% span length and fiber strength were significant at 0.01 or 0.05 levels in three varieties population of M_5 progenies. The correlation among other traits of three population of M_5 progenies were difference.
     3个品种的M5群体的铃重与2.5%跨长和比强度均呈显著或极显著正相关,在其它性状间的相关性上3个品种的M5群体间存在较大差异;
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  “跨长和”译为未确定词的双语例句
     The F 1s had a high heterosis in lint cotton yield of -54.54%~214.98%,averaged 45.04%.
     F1与F2代的纤维品质以2.5%跨长和伸长率的优势最明显,麦克隆值的负向优势较明显。
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  相似匹配句对
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     文化差异
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  span length
Aerodynamic challenges in span length of suspension bridges
      
To ensure the technological feasibility of suspension bridges with longer spans, the static estimation of feasible span length is then made based on current material strength and weight of cables and deck.
      
The four lowest natural frequency parameters are reported as functions of four non-dimensional system parameters: the rise to chord length ratio, the span length to chord length ratio, the slenderness ratio and the shear parameter.
      
Seven fiber traits (elongation, maturity, micronaire reading, perimeter, 2.5% span length, strength, and wall thickness) were measured.
      
Linkage between T1 and loci affecting micronaire, perimeter, 2.5% span length, strength, and wall thickness was found in both populations.
      
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Eight glandless upland breeding parents including four

选择8个现代低酚陆地棉育种亲本(包括4个高酚棉和4个低酚棉品种),按4×4不完全双列杂交设计,对16个组合的F×进行了双列分析。结果表明,在所研究的10个性状中,子棉产量、皮棉产量和纤维整齐度主要受非加性基因控制,单铃重、衣分、比强度、2.5%跨长和麦克隆值则主要由加性基因控制,衣指由加性和非加性基因共同控制,而子指受环境的影响较大;在大多数性状上,高酚棉亲本的加性遗传方差比低酚棉亲本贡献大,而在2.5%跨长和麦克隆值2个性状上,低酚棉亲本的加性遗传方差起着更重要的作用;中7886是综合性状比较理想的亲本材料,冀合225是较好的高产亲本,冀无252和中无151是较好的优质低酚棉亲本。综合一般配合力和特殊配合力分析结果,组合中7886×冀无252可具较好的育种潜力。

Fifteen F 1s and F 2s were made between five upland cotton parents and three breeding lines with extruded stigma to analyze their heterosis, and combining ability of 11 characters. The results showed that the heterosis for yield and fiber properties were obvious. The F 1s had a high heterosis in lint cotton yield of -54.54%~214.98%,averaged 45.04%.12 crosses had a positive heterosis of -31.21%~290.90%, averaged 79.31% , and had a useful heterosis of -54.54%~65.72%,averaged 8.21%. The F 2s from 9...

Fifteen F 1s and F 2s were made between five upland cotton parents and three breeding lines with extruded stigma to analyze their heterosis, and combining ability of 11 characters. The results showed that the heterosis for yield and fiber properties were obvious. The F 1s had a high heterosis in lint cotton yield of -54.54%~214.98%,averaged 45.04%.12 crosses had a positive heterosis of -31.21%~290.90%, averaged 79.31% , and had a useful heterosis of -54.54%~65.72%,averaged 8.21%. The F 2s from 9 crosses had a positive heterosis of -27.24%~60.94%,averaged 5.28%, from another 9 crosses had a positive heterosis of -22.05%~92.69%, averaged 32.96%,and from 14 crosses had a useful heterosis of -46.08%~31.44%,averaged -5.00%. The female Zhong 164 and 0305 and the male parent 94 34 and 94 51 had a high combining ability for most characters. The A5B3 was a good cross with a high SCA.

以常规陆地棉为母本、柱头外露种质系为父本,按NCⅡ交配设计进行杂交,对其F1、F2代11个性状杂种优势和配合力的分析表明,F1、F2代产量性状和品质性状均具有明显的杂种优势,产量性状以籽棉产量、皮棉产量和单株铃数的优势最明显。F1与F2代的纤维品质以2.5%跨长和伸长率的优势最明显,麦克隆值的负向优势较明显。2.5%跨长和伸长率在F1、F2代中的表现趋势相似,籽棉产量和皮棉产量F2代的平均值与高亲值和中亲值的相关关系密切。一般配合力(GCA)效应值的大小和作用方向在F1、F2代中的表现趋势相似,GCA以中164、郑305和0305常规亲本表现较好,柱头外露种质系以94-34和94-51较优;特殊配合力(SCA)效应多数组合在F1、F2代中的表现趋势相似,0305×94-42多数性状为正,且值较大,综合表现较优。

Fifteen F1 and F2 were used between five marked breeding lines with

采用NCⅡ遗传交配设计,对5份标记型柱头外露种质系和3份陆地棉亲本交配后,杂种F1的11个性状的杂种优势和配合力进行了分析。结果表明,主要产量性状霜前皮棉产量,超高优势的幅度为-28.88%~13.17%,平均为-3.06%,6个组合具正向的杂种优势;中亲优势的幅度为18.14%~80.12%,平均为53.08%,15个组合均具有正向的中亲优势;竞争优势的幅度为-15.32%~46.43%,平均为11.27%,10个组合具有正向的竞争优势。其它产量性状中单株铃数的杂种优势最为明显。纤维品质性状,2.5%跨长和比强度的优势明显,麦克隆值的负向优势明显。高亲值、中亲值和低亲值与F1平均值的相关关系表明,多数产量性状F1代平均值与高亲值相关性密切,因此在组合筛选时应注意对常规亲本的选择。配合力上,GCA效应显著的性状,中棉所19和石321分别在产量、品质性状方面表现较优,96-1、96-67、96-33等3份标记型柱头外露种质系表现较优;SCA效应显著的8个性状中,A1B28个性状的SCA效应值均为正,A2B2和A4B1均有7个性状的SCA效应为正。文中对标记型柱头外露种质及亲本选配等问题进行了讨论。

 
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