Coelho G R C, Brondani C, Hoffmann L V, Valdisser P A M R, Borba T C O, Mendonça J A, Rodrigues L A, de Menezes I P P
Laboratório de Biotecnologia Vegetal, Embrapa Arroz e Feijão, Santo Antônio de Goiás, GO, Brasil
Laboratório de Biotecnologia Vegetal, Embrapa Arroz e Feijão, Santo Antônio de Goiás, GO, Brasil.
Genet Mol Res. 2017 Sep 21;16(3):gmr-16-03-gmr.16039793. doi: 10.4238/gmr16039793.
The objective of this study was to analyze the diversity and discrimination of high-performance Brazilian rice cultivars using microsatellite markers. Twenty-nine rice cultivars belonging to EMBRAPA Arroz e Feijão germplasm bank in Brazil were genotyped by 24 SSR markers to establish their structure and genetic discrimination. It was demonstrated that the analyzed germplasm of rice presents an expressive and significant genetic diversity with low heterogeneity among the cultivars. All 29 cultivars were differentiated genetically, and were organized into two groups related to their upland and irrigated cultivation systems. These groups showed a high genetic differentiation, with greater diversity within the group that includes the cultivars for irrigated system. The genotyping data of these cultivars, with the morphological e phenotypical data, are valuable information to be used by rice breeding programs to develop new improved cultivars.
本研究的目的是利用微卫星标记分析巴西高性能水稻品种的多样性和鉴别能力。通过24个SSR标记对巴西农业研究公司水稻和豆类种质库中的29个水稻品种进行基因分型，以确定它们的结构和遗传鉴别能力。结果表明，所分析的水稻种质具有显著的遗传多样性，品种间异质性较低。所有29个品种在遗传上都有差异，并根据其旱作和灌溉种植系统分为两组。这两组显示出高度的遗传分化，在包括灌溉系统品种的组内具有更大的多样性。这些品种的基因分型数据以及形态学和表型数据，是水稻育种计划用于培育新改良品种的宝贵信息。
