Genetic diversity of high performance cultivars of upland and irrigated Brazilian rice.

Abstract

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.

Genetic Diversity of Sabah Rice Cultivars Using Random Amplified Polymorphic Dna (Rapd) Markers

“…As such, Cluster II comprised upland samples alone, while Cluster III was a mixture of upland and irrigated rice samples. The categorisation of upland and irrigated rice into three clusters was according to a study conducted by Coelho et al (2017), whereby the genetic diversity of upland and irrigated Brazilian rice was found to be divided into three main clusters. As such, one cluster was formed by irrigated rice, one cluster by upland rice, and a third by a combination of upland and irrigated rice.…”