Agro-morphological characterization of upland rice accessions

Abstract

The agro-morphological characterization is fundamental in order to provide information for plant breeding programs. The aim of the present study was to characterize 146 accessions of upland rice (Oryza sativa L.), based on qualitative and quantitative agro-morphological descriptors. The experiment was conducted in Recife, state of Pernambuco, Brazil, using a randomized block design with three replicates. Polymorphism was observed among 12 of 14 qualitative characters evaluated, whereas significant differences (p < 0.05) were observed for 11 of the 14 analysed quantitative traits. Genetic variance was higher than environmental variance and the average inheritability coefficients were above 80 % for all characters, which ensures the predominance of the genetic components in the differences observed among accessions. On the cluster analysis for qualitative traits the accessions were classified in two groups with a total of 18 duplicates, whereas for the quantitative traits three groups were obtained with few subgroups. The principal component analysis for quantitative traits showed great dispersion of the accessions. The most divergent group of accessions included the genotypes Mitsukasane, Mie, Tomoe mochi, Ooba kirishima and Nourin mochi 6, which showed a higher number of spicklets per plant. There is high variability among the rice accessions from the germplasm collection studied, which presents great importance for breeding programs or for genetic studies on this species

Study of glycyrrhizic acid contents from Glycyrrhiza glabra populations in Iran and their relation with environmental factors

“…Accessions from the same district were not always grouped into the same cluster or sub-clusters, implying high quantitative trait diversity of red and black upland rice germplasm from ENT province. Similar results have been previously reported by other workers (do Nascimento et al 2011;Rabara et al 2014;Shinta et al 2014).…”

“…We also found significant variation on basal culm internode diameter, which ranged from 0.4 cm to 1.7 cm. Remarkable variation in this trait had also been reported by other workers in red and black upland rice germplasm (do Nascimento et al 2011;Shinta, et al 2014;Nurhasanah et al 2016).…”

Genetic Divergence of Balam Rice (Oryza sativa L.) Germplasm of Bangladesh

“…It also revealed that no duplicate existed among the genotypes for the studied characters. Fukuoka et al (2006), Hossain (2008), Sarhadi et al (2009) and Nascimento et al (2011) earlier also found no duplicates from cluster analysis using Mahalanobis' D 2 statistics in rice. The clustering pattern also revealed that the genotypes constellated in the cluster were not originated from the same geographic region.…”

Morphological Diversity of Corn’s (&lt;i&gt;Zea mays&lt;/i&gt; L.) Local Cultivar and Improved Varieties in Central and North of Benin

“…This agro-morphological characterization requires the use of certain evaluation techniques using morphological markers [14]. Such studies have already been carried out on grains such as maize [13] [15], the sorghum [16], rice [17] [18], millet [19] [20], the barley [21] and wheat [22] [23]. The overall objective of this study was to evaluate the genetic variability within the maize collection at the Centre and North of Benin by using morphological descriptors.…”