Effects of loci determining photoperiod sensitivity (Ppd-H1) and vernalization response (Sh2) on agronomic traits in the ‘Dicktoo’בMorex’ barley mapping population
Effects of loci determining photoperiod sensitivity (Ppd-H1) and vernalization response (Sh2) on agronomic traits in the ‘Dicktoo’בMorex’ barley mapping population
复制标题
决定光周期敏感性（Ppd-H1）和春化反应（Sh2）的位点对“Dicktoo”דMorex”大麦作图群体农艺性状的影响
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
Z. Bedo
中科院分区：
文献类型：
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作者：
I. Karsai;K. Mészáros;P. Szűcs;P. Hayes;L. Laszlo;Z. Bedo
本研究的目的是确定Ppd-H1和Sh2位点在短光周期和长光周期下对农艺性状的个体和互作效应。来自Dicktoo × Morex定位群体的19个双单倍体（DH）系，分别代表Ppd-H1和Sh2位点的4个基因型，在受控环境光周期中进行了表型分析。Ppd-H1和Sh2除了决定首节外观和开花时间外，还对几个农艺性状有显著影响。这些影响的大小取决于日光。在长日照条件下（18 h） Ppd-H1和短日照条件下（12 h） Sh2是大多数性状的显著决定因素。在长光周期和短光周期条件下，这两个基因座之间的相互作用在几个性状上都是显著的，特别是在产量成分上。在长日照处理下，Ppd-H1通过决定节数影响株高。两个基因座在千粒重和分蘖上均存在上位性关联。光周期不敏感和春化需求的结合导致分蘖显著增加。这与千粒重的减少是平行的。在长时间处理下，Ppd-H1和Sh2均不影响植株产量。在短日照条件下，光周期不敏感和春化需求的组合对植株产量有显著的负影响。
The objectives of this research were to determine the individual and interaction effects of the Ppd-H1 and Sh2 loci on agronomic traits under short- and long-photoperiod regimes. Nineteen doubled haploid (DH) lines from the ‘Dicktoo’בMorex’ mapping population, which represented the four genotypes at the Ppd-H1 and Sh2 loci, were pheno-typed in controlled environment photoperiods. Both Ppd-H1 and Sh2 had significant effects on several agronomic traits, in addition to their role in determining first node appearance and flowering time. The magnitude of these effects depended on daylight. Under long-day conditions (18 h) Ppd-H1, and under short-day conditions (12 h) Sh2 was a significant determinant of most characters. The interactions between these two loci were significant for several characters, particularly for yield components, under both long- and short-photoperiod regimes. Under the long-day treatment, Ppd-H1 influenced plant height through the determination of node number. There was an epistatic association between the two loci for both 1000-kernel weight and tillering. The combination of photoperiod insensitivity and vernalization requirement caused a significant increase in tillering. This was paralleled by a decrease in 1000-kernel weight. Under the long-day treatment, neither Ppd-H1 nor Sh2 influenced plant yield. Under short-day conditions, the combination of photoperiod insensitivity and vernalization requirement had a pronounced negative effect on plant yield.