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首页> 外文期刊>Crop Science >Effects of the alleles at OsAGPS2 and OsSUT1 on the grain filling in extra-heavy panicle type of rice.
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Effects of the alleles at OsAGPS2 and OsSUT1 on the grain filling in extra-heavy panicle type of rice.

机译：OsAGPS2 和 OsSUT1 等位基因对超重穗型水稻籽粒灌浆的影响。

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摘要

Rice (Oryza sativa L.) cultivars of extra-heavy panicle type (EHPT), which have numerous spikelets in a panicle, often fail to realize their high-yield potential due to poor grain filling in general, while some EHPTs showed relatively better grain filling. This study first surveyed nucleotide polymorphisms in rice genes possibly related to grain filling, that is, genes for ADPglucose pyrophosphorylase (AGPase) subunits, OsAGPS2 and OsAGPL2, and a sucrose transporter gene, OsSUT1, to clarify the causes underlying such genetic variation. Many types of polymorphisms were detected in all three genes, but none of them affected amino acid sequences. OsAGPS2 and OsSUT1 had an identical series of polymorphisms in two EHPT cultivars, Milyang 23 and Nanjing 11, both of which have a high degree of grain filling, while another series for these genes was detected in other EHPTs showing a low grain filling. The former polymorphisms could constitute alleles for good grain filling in OsAGPS2 and OsSUT1, designated as AS2-2 and SUT1-2, respectively. Second, new molecular markers based on the polymorphisms for OsAGPS2 and OsSUT1 were developed. Finally, three EHPT cultivars with AS2-2 SUT1-2 genotype showed a higher degree of grain filling and higher activity of AGPase than three other EHPTs with another genotype at these loci. These results suggest that these AS2-2 and SUT1-2 alleles can contribute to the improvement of poor grain filling of EHPTs assisted with the developed markers.Digital Object Identifier http://dx.doi.org/10.2135/cropsci2009.11.0690
机译：穗型中有许多小穗的超重穗型（EHPT）水稻品种通常由于籽粒灌浆差而无法发挥高产潜力，而一些EHPT则显示出相对较好的籽粒填充。这项研究首先调查了水稻基因中可能与谷物填充相关的核苷酸多态性，即ADP葡萄糖焦磷酸化酶（AGPase）亚基， OsAGPS2 和 OsAGPL2 的基因以及蔗糖转运蛋白基因。 ， OsSUT1 ，以阐明导致这种遗传变异的原因。在所有三个基因中都检测到许多类型的多态性，但没有一个影响氨基酸序列。 OsAGPS2 和 OsSUT1 在两个EHPT品种Milyang 23和Nanjing 11中具有相同的多态性序列，它们的籽粒充实度很高，而另一个则用于在其他EHPT中检测到基因，显示出较低的籽粒充实。前者的多态性可以构成 OsAGPS2 和 OsSUT1 中的良好谷物填充的等位基因，分别命名为 AS2-2 和 SUT1-2 。其次，基于 OsAGPS2 和 OsSUT1 的多态性，开发了新的分子标记。最后，在这些基因座上，三个具有 AS2-2 SUT1-2 基因型的EHPT品种比其他三个具有另一种基因型的EHPT表现出更高的籽粒充实度和更高的AGPase活性。这些结果表明，这些 AS2-2 和 SUT1-2 等位基因可以在已开发的标记辅助下改善EHPT的较差谷物填充。 /dx.doi.org/10.2135/cropsci2009.11.0690

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