Browsing by Author "Khan, Md Arifur Rahman (TTU)"
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Item Exploring the Phenotypic and Genetic Variabilities in Yield and Yield-Related Traits of the Diallel-Crossed F5 Population of Aus Rice(2023) Khan, Md Arifur Rahman (TTU); Mahmud, Apple; Ghosh, Uttam Kumar; Hossain, Md Saddam; Siddiqui, Md Nurealam; Islam, A. K.M.Aminul; Anik, Touhidur Rahman (TTU); Rahman, Md Mezanur (TTU); Sharma, Anket (TTU); Abdelrahman, Mostafa (TTU); Ha, Chien Van (TTU); Mostofa, Mohammad Golam; Tran, Lam Son Phan (TTU)Rice (Oryza sativa) is a major crop and a main food for a major part of the global population. Rice species have derived from divergent agro-climatic regions, and thus, the local germplasm has a large genetic diversity. This study investigated the relationship between phenotypic and genetic variabilities of yield and yield-associated traits in Aus rice to identify short-duration, high-yielding genotypes. Targeting this issue, a field experiment was carried out to evaluate the performance of 51 Aus rice genotypes, including 50 accessions in F5 generation and one short-duration check variety BINAdhan-19. The genotypes exhibited a large and significant variation in yield and its associated traits, as evidenced by a wide range of their coefficient of variance. The investigated traits, including days to maturity (DM), plant height (PH), panicle length (PL) and 1000-grain weight (TW) exhibited a greater genotypic coefficient of variation than the environmental coefficient of variation. In addition, the high broad-sense heritability of DM, PH, PL and TW traits suggests that the genetic factors significantly influence the observed variations in these traits among the F5 Aus rice accessions. This study also revealed that the grain yield per hill (GY) displayed a significant positive correlation with PL, number of filled grains per panicle (FG) and TW at both genotype and phenotype levels. According to the hierarchical and K-means cluster analyses, the accessions BU-R-ACC-02, BU-R-ACC-08 and R2-36-3-1-1 have shorter DM and relatively higher GY than other Aus rice accessions. These three accessions could be employed in the ongoing and future breeding programs for the improvement of short-duration and high-yielding rice cultivars.Item Genetic variability and agronomic performances of rice genotypes in different growing seasons in Bangladesh(2023) Khan, Md Arifur Rahman (TTU); Mahmud, Apple; Islam, Md Nahidul; Ghosh, Uttam Kumar; Hossain, Md SaddamGenetic variability is a key factor in the selection of suitable genotypes in rice breeding programs. To evaluate the genetic variability of 11 rice genotypes, a study was carried out in the field of agronomy at Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, during 2019–2020. These genotypes were characterized for 11 traits and analyzed to determine the level of genetic and agronomic diversity as well as the degree of association existing between grain yield and its related component traits. The results revealed significant differences (P ≤ 0.001 and 0.05) among the rice genotypes for the studied traits in all growing seasons. Furthermore, it was noted that the phenotypic coefficient of variation was more pronounced than the genotypic coefficient of variation, highlighting the environmental impact on each trait. The majority of the traits had moderate to high heritability and genetic advance across the three seasons, showing additive gene action. The principal component analysis showed that the first three principal components accounted for the greatest variability, with the majority of the evaluated traits significantly influencing the genetic variability. The mean value of studied traits exhibited that there was seasonal variation of grain yield by the genotypes, such as BU-R-ACC-08 and BU-R-ACC-11 genotypes, which produced higher yield in Aus, BU-R-ACC-05 and BU-R-ACC-06 in Aman, and BU-R-ACC-07 and BU-R-ACC-06 in Boro season, where several genotypes mature earlier in all growing seasons, viz., BU-R-ACC-05, BU-R-ACC-01, BU-R-ACC-10, and BU-R-ACC-11. The correlation analysis revealed that there were significant, strong positive or negative correlations among the traits. The results suggest that agronomical traits that were positively correlated with grain yield could be useful in selecting desired rice genotypes.Item Genome-wide characterization of the glutathione S-transferase gene family in Phaseolus vulgaris reveals insight into the roles of their members in responses to multiple abiotic stresses(2024) Anik, Touhidur Rahman (TTU); Chu, Ha Duc; Ahmed, Md Shahabuddin; Van Ha, Chien (TTU); Gangurde, Sunil S.; Khan, Md Arifur Rahman (TTU); Le, Thao Duc; Le, Dung Tien; Abdelrahman, Mostafa (TTU); Tran, Lam Son Phan (TTU)Glutathione S-transferases (GSTs) are a class of multifunctional enzymatic antioxidants that play a significant role in several aspects of plant physiology, including growth, development, and cellular protection from biotic and abiotic stressors. A total of 59 GST genes were found in Phaseolus vulgaris genome, which were categorized into 11 distinct classes according to their evolutionary connection and the existence of conserved structural domains and motifs. Gene duplication analysis revealed that the evolution of the members of the GST gene family in P. vulgaris was driven by both segmental and tandem duplication events. Analysis of the expression profiles of identified PvGST genes using the available transcriptome data demonstrated notable expression patterns and organ specificity of many genes throughout several developmental stages and under drought or salinity. Subsequent RT-qPCR analysis of several drought-responsive or salinity-responsive candidate genes showed that PvGSTF4 was up-regulated solely by drought, PvGSTU11 was up-regulated only by salinity, and PvGSTU3, PvGSTU12, PvGSTU13, PvGSTU14, PvGSTU16, PvGSTT1, and PvGSTZ2 were up-regulated by both salt and drought. The up-regulated PvGSTs under drought and/or salinity might enable P. vulgaris to adapt to stressful environments. These candidate genes could be explored in genetic engineering programs for development of stress-tolerant P. vulgaris varieties.