Assessment of genetic relationship and heritability among F2 generation of four crosses in rice using agro-morphological markers

Abstract

Due to its higher consumption in Asian populations, white rice may lead to increase risk of developing type 2 diabetes mellitus. The glycaemic index of rice renders it the main contributor to dietary glycaemic load. Even though there are abundant rice genetic resources, the incorporation of germplasm sources is very important when looking for new alleles that play a role to prevention of the type 2 diabetes mellitus. Four rice cultivars were crossed to obtain low glycaemic index genotype in our previous research. In this paper, the agro-morphological markers of F2 generation were further assessed for genetic relationship and heritability. Furthermore, our results showed variation among the F2 generation rice genotypes in terms of agro-morhological trais studied is low. This could be an implication of the presence of a narrow genetic resources of these genotypes. Low heritabilities were observed for plant height, culm color, harvest time, flowering time, number of tillers, panicles length, and grain yield per plant, except panicle weight. Dendrogram contained four main clusters, which confirm genetic relationship among the genotypes. The improved rice genotypes from cluster IV (F2-SP, FS-GL, F2-SL, F2-LS) and cluster II (F2-PS and F2-LG) were identified with distinct genetic attributes useful in future low-glycaemic index with fine grain rice breeding program.

Correlation of lipid profile, glucose, and body composition on insulin resistance in overweight and obese subjects

“…The distribution of lipid and glucose levels and body composition profile data for all subjects are shown in figure 2. Body composition was not correlated with insulin resistance using the HOMA-IR index, in line with a previous study (Lisnawati et al, 2023). The difference in the index parameters used was also a cause.…”

Testing of sprouting, genetic diversity and heritability of some local gogo rice cultivers

“…The results showed that the heritability values ranged between medium and high; the characters of maximum growth potential, germination ability, and germination time had moderate heritability values, while the dry weight of sprouts had high heritability values. The coefficient value of genetic diversity provides information about the variety of data resulting from a study; the high or low weight of the coefficient of gene diversity depends on the germination produced from several cultivars used; the higher the coefficient value of genetic diversity, the more diverse germinations are made and vice versa [16,17].…”

Estimation of genetic parameters in hybrid and F2 generations of aromatic fine rice

“…Rice (Oryza sativa L.), the most important dietary carbohydrate in the world, is a monocotyledonous angiosperm that belongs to the family Gramineae (Kumar et al 2020). Asian countries comprise almost 90% of both the world's rice producers and consumers (Kusmiyati et al 2020). In Bangladesh, food security is synonymous with rice security.…”