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首页> 外文期刊>International Journal of Plant Breeding and Genetics >Variation and correlation of phenotypic traits contributing to high yield in KMR3-Oryza rufipogon introgression lines.
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Variation and correlation of phenotypic traits contributing to high yield in KMR3-Oryza rufipogon introgression lines.

机译：表型性状的变异和相关性促进了KMR3- Oryza rufipogon 基因渗入系的高产。

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摘要

Introgression lines (IL) from crosses between elite cultivars and wild species are an important resource for mapping quantitative trait loci (QTLs) for yield. In this study, 25 KMR3-O. rufipogon ILs, from an advanced back cross population, were selected for high grain yield in field trials and characterized in detail for yield and related traits from seed to seed. The aim was to dissect the basis of high yield in the entire life cycle to identify common features in high yielding ILs. This study indicated that each IL has a different strategy or a combination of different yield traits to attain high yield. High yield in these ILs was associated with early flowering, high number of tillers, panicles, grains, seed weight per panicle and seed density. Seed germination rate, leaf SPAD chlorophyll meter value, plant height, panicle length and 100 seed weight did not have much impact on yield. Highest significant positive correlation was observed between number of tillers and number of productive tillers (0.98) as expected. A highest significant negative correlation was observed between seed density and seed compactness (-0.95). The new negative correlation between seed germination rate and leaf SPAD chlorophyll meter value in the top 10 ILs was supported by a non significant negative correlation (-0.17) in BC3F4 IL population and deserves further study. Restricting to a specific ideotype in selection may be counterproductive in rice breeding. These ILs are being used in rice improvement and to identify favorable genes from O. rufipogon for increasing yield.
机译：来自优良品种和野生物种之间杂交的渗入系（IL）是用于绘制产量的数量性状基因座（QTL）的重要资源。在这项研究中，为25 KMR3-iO。在田间试验中，从先进的回交群体中选出了rufipogon IL，以提高谷物产量，并详细描述了种子之间的产量及相关性状。目的是剖析整个生命周期中高产量的基础，以鉴定高产量IL的共同特征。这项研究表明，每个IL具有不同的策略或不同的产量性状的组合以获得高产量。这些白介素的高产量与早期开花，分,、穗，粒，每穗的种子重和种子密度高有关。种子发芽率，叶片SPAD叶绿素米值，株高，穗长和100种子重量对产量没有太大影响。如预期的那样，在分ers数与生产性分ers数之间观察到最高的显着正相关（0.98）。在种子密度和种子密实度之间（-0.95）观察到最高的显着负相关。 BC 3 F 4 中的非显着负相关（-0.17）支持了前10个IL中种子发芽率与叶片SPAD叶绿素仪值之间的新负相关。 IL人群，值得进一步研究。在选择中限制特定的表型可能在水稻育种中适得其反。这些IL被用于水稻改良并从O中鉴定出有利的基因。 rufipogon 可提高产量。

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