Genotypic correlations and QTL correspondence between line per se and testcross performance in sugar beet (Beta vulgaris L.) for the three agronomic traits beet yield, potassium content, and sodium content
Genotypic correlations and QTL correspondence between line per se and testcross performance in sugar beet (Beta vulgaris L.) for the three agronomic traits beet yield, potassium content, and sodium content
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DOI：
10.1007/s11032-014-0030-6
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发表时间：
2014-01
影响因子：
3.1
通讯作者：
D. Schwegler;M. Gowda;B. Schulz;T. Miedaner;Wenxin Liu;J. Reif
中科院分区：
文献类型：
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作者：
D. Schwegler;M. Gowda;B. Schulz;T. Miedaner;Wenxin Liu;J. Reif
在杂交育种设计中，品系本身与测交表现之间的基因型相关是一个重要的数量遗传参数。本研究的主要目的是利用多系杂交QTL定位技术，从表型和分子水平研究品系本身与测交表现的关联。本研究利用甜菜三个分离群体的测交表现和品系本身的试验资料，人口。用481个单核苷酸多态性和40个简单重复序列标记对分离后代进行基因分型，并在田间试验中对甜菜产量以及钾和钠含量进行评价。我们观察到测交和行本身的性能与分析的性状的复杂性增加的基因型之间的相关性下降。这一情况也在分子水平上通过重叠QTL的存在而反映出来。一个更详细的分析部队造成低的基因型之间的相关性本身和测交性能不能排除可能的上位性的相关性，并建议存在的掩蔽显性效应。
The genotypic correlation between line per se and testcross performance is an important quantitative genetic parameter in the design of hybrid breeding programs. The main goal of this survey was to study the association of line per se and testcross performance at the phenotypic and molecular levels by applying multiple-line cross quantitative trait locus (QTL) mapping. We used experimental data from line per se and testcross performance of three segregating sugar beet (Beta vulgarisL.) populations. The segregating progenies were genotyped with 481 single nucleotide polymorphism and 40 simple sequence repeat markers and evaluated in field trials for beet yield as well as potassium and sodium content. We observed a decrease in the genotypic correlations between testcross and line per se performance with increasing complexity of the analyzed trait. This picture was also reflected at a molecular level by the presence of overlapping QTLs. A more detailed analysis of the forces causing low genotypic correlation between line per se and testcross performance could not rule out a possible relevance of epistasis and suggested the presence of masking dominance effects.