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RISS 인기검색어
- 검색키워드
- 저자 : Md. Mazharul Islam (검색결과 18 건)
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Islam, Md. Mazharul,Yesmin, Reshma,Jung, Min-Jung,Kim, Hong-Yul,Kim, Chang-Kil,Lim, Ki-Byung Korean Society for Horticultural Science 2020 Horticulture, Environment, and Biotechnology Vol.61 No.2
<P> This study aimed to determine the morphological and cytogenetic differences in an intraspecific Asiatic F<SUB>1</SUB> <I>Lilium</I> hybrid. The results indicated that leaf color and shape, flower morphology including color, spot size on petal, and filament color in the F<SUB>1</SUB> hybrid showed significant variations as compared to parents, while days to flowering were similar to those of the parents. Moreover, stem height, leaf number, and leaf width showed distinct variations. Interestingly, the intraspecific F1 progeny obtained from Asiatic lily parents showed higher pollen viability. In addition, FISH results revealed significant variation in the number of 18S rDNA and 5S rDNA loci identified in both parents and the F<SUB>1</SUB> progeny. The female (2n=4x=48) parent had 12 loci of 18S rDNA, whereas the male (2n=2x=24) parent and the F<SUB>1</SUB> (2n=3x=36) had 8 and 11 loci of 18S rDNA, respectively. Moreover, the F<SUB>1</SUB> progeny had 9 loci of 5S rDNA compared with the 7 and 4 loci identified in the female and male parents, respectively. All 5S rDNA signals were observed on the long arm in both the female parent and the F<SUB>1</SUB>; however, one 5S rDNA signal was observed on the short arm in the male parent. Therefore, this study demonstrated that the distribution of ribosomal DNA was greatly different in the F<SUB>1</SUB> progeny than that of parents. </P>
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( Md. Abdul Kahir ),( Md. Mazharul Islam ),( A. K. M. Anisur Rahman,),( A. Nahar ),( Md. Siddiqur Rahman ),( Hee Jong Song ) 한국가축위생학회 2008 韓國家畜衛生學會誌 Vol.31 No.4
A cross-sectional study was undertaken to report prevalence and to identify risk factors of subclinical mastitis of dairy cattle in Sylhet district of Bangladesh. Among 325 dairy farms of the district 12 farms(3.7%) were selected conveniently for this study. All the dairy cows of the 12 farms were selected for sample collection. Fresh milk samples from each of the selected dairy cows were collected aseptically in separate sterilized test tube as RF, RH, LF and LH quarter of the udder. Rapid modified White Side Test(WST) was used to detect subclinical mastitis(SCM). Results of WST and data derived from filled in questionnaire were entered in Microsoft Excel 2003 and transferred to STATA®, version 8.0/Intercooled (Stata Corporation, Texas, USA, 2003). The overall prevalence of SCM and its distribution in different categories of variables in cow and their exact binomial 95% confidence intervals were calculated in STATA®. Simple bivariable associations among independent variables were investigated by χ2 test in STATA®. Multiple logistic regression analysis with backward elimination method was used to identify risk factors of SCM. To identify significant variation in quarter SCM, linear regression analysis was performed after arcsine trans-formation of the data. The overall prevalence of SCM found in this study is 54%. Dairy cows with teat lesions had significantly increased SCM(OR=12342, P value=0.000, 95% CI=762, 199798) than others without teat lesions. The Holstein FriesianXJerseyXSahiwal breed has significantly decreased(OR=0.18, p=0.03, 95% CI 0.04, 0.85) SCM than other breeds. The prevalence of SCM found in this study is in agreement with others. The injury in the teat increases the probability of getting infected with microbes and thereby mastitis. If the prevalence of teat lesion can be decreased the probability of subclinical mastitis will also be decreased. The negatively associated Holstein FriesianXJerseyXSahiwall breed may help in planning mastitis control program if this finding can be validated by a more powerful case-control or cohort study design.
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MD Mazharul Islam,Hye-Min Lee,Deen Mohammad Deepo,Hong Yul Kim,Ki-Byung Lim 한국원예학회 2021 한국원예학회 학술발표요지 Vol.2021 No.10
This study was aimed at differentiating parental genomes, examining intergenomic composition, and mapping mitotic metaphase chromosomes by localizing parental and 18S rDNA probes in seven interspecific hybrid progenies that originated from Lilium longiflorum. Since in situ hybridization has not been previously used in lily breeding, flow cytometry was used in conjunction with genomic and fluorescent in situ hybridization to determine the genomic contribution of each parent to the interspecific progenies. A significant variation was observed in the DNA content, chromosome length, and 18S loci in F₁ as compared to the female and male parents. L. longiflorum showed nearly two times higher DNA content than the male parents and L. longiflorum × Asiatic progenies, but eight times higher than L. longiflorum × L. hansonii. Genomic in situ hybridization results revealed that both female and male parents contributed an equal number of chromosomes to their interspecific F₁ offspring. Fluorescent in situ hybridization mapping revealed that 18S rDNA had 8, 6 and 7 loci in L. longiflorum parents, i.e., White heaven, Bright tower, and White tower, respectively, whereas each Asiatic cultivar and L. hansonii used as male showed 8 and 12 loci respectively. Interspecific progenies showed 8 and 7 loci in LA, and 10 to 11 in LM hybrids. These cytogenetic results implied equal genetic and chromosomal contribution from both parents to their intergenomic progenies. Therefore, this combined cytogenetic method has the potential to be an affordable and time-saving approach in lily breeding that could determine the status of hybrids and their genomic origin while achieving physical mapping and detecting genes in different genomes.
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Morphological Characteristics and FISH Analysis of Hibiscus F1 Hybrids and Parental Lines
조영관,Islam MD Mazharul,김창길,Hong-Yul Kim,임기병 한국원예학회 2019 원예과학기술지 Vol.37 No.5
In this study, the characteristics of ‘Tohagolred’, ‘Daewangchun’ generated by a reciprocal cross between Hibiscus sinosyriacus ‘Seobong’ and H. syriacus ‘Samchully’, and the correspondingparental lines were investigated and DNA content was measured by flow cytometry. FISH detection of 5S and 45S rDNA was conducted to analyze the parental and progeny karyotypes. The leaf margin was serrate for ‘Samchully’ and crenate for ‘Seobong’. The leaf margin of ‘Daewangchun’ was crenate, the avarage leaf length was 8.2 cm, and the average leaf width was 5.4 cm. The leaf margin of ‘Tohagolred’ was crenate, the average leaf length was 7.2 cm, and the average leaf width was 5.7 cm. The diameter of the ‘Daewangchun’ flower was 13.8 cm, which was 2 cm larger than the parents, and the red eye radius was 2.1 cm, which was approximately 1 cm larger than that of the parents. ‘Daewangchun’ appeared pink in color, similar to ‘Samchully.’ The flower diameter of ‘Tohagolred’ was 12.6 cm, which was 1 cm larger than that of the parents; the red eye length radius was 1.1 cm and approximately 1 cm smaller than that of the parents. ‘Tohagolred’ also appeared pink in color, similar to ‘Samchully.’ The DNA content was 1928.77 Mbp/1C (1.97 pg/1C) for ‘Seobong’ and 2820.34 Mbp/1C (2.88 pg/1C) for ‘Samchully’. Moreover, the DNA content of ‘Daewangchun’ and ‘Tohagolred’ was 1975.88 Mbp/1C (2.88 pg/1C) and 1914.70 Mbp/1C (1.97pg/1C), respectively. DAPI staining showed that ‘Seobong’ was 2n = 80 and ‘Samchully’ was 2n =126 as parents. However, Hibiscus F1 cultivars ‘Daewangchun’ and ‘Tohagolred’ were 2n = 82.FISH analysis revealed that ‘Seobong’ had six 45S rDNA signals and two 5S rDNA signals. In contrast, ‘Samchully’ had six 45S rDNA signals and three 5S rDNA signals. Both ‘Daewangchun’and ‘Tohagolred’ had seven 45S rDNA signals and two 5S rDNA signals. These results provide a foundation for genetic analysis and cultivation of new crops of Hibiscus spp.
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Application of remote sensing for salinity based coastal land use zoning in Bangladesh
Morshed Md. Manjur,Sarkar Showmitra Kumar,Zzaman Md. Rashed Uz,Islam Md. Mazharul 대한공간정보학회 2021 Spatial Information Research Vol.29 No.3
Rising soil and water salinity is a major concern for coastal areas. Salt-water shrimp aquaculture is a land use mal-adaption to the rising salinity trend, and is contributing to the salinity expansion as well as lowering land productivity in the coastal areas of Bangladesh. This paper aims to propose a salinity-based land use zoning to restrict salinity expansion and to reduce land use conflicts. An integrated salinity detection technique combing field soil samples, a geographic information system and remote sensing were used. Subsequently, two determining factors of land suitability—soil salinity and distance from saline water sources—were used to identify zones for paddy/crop, mixed use and shrimp. The study districts witnessed rising salinity between 1990 and 2016, and thereby, decreasing suitable land are for paddy/crop by 20.96% of the agricultural area. The land suitability for paddy, mixed use and shrimp zones was found to be 51.88%, 29.36% and 18.76% of the study area, respectively. The proposed zoning strategy of this paper can be used as a quick and efficient tool for baseline information for integrated coastal zone management plan.
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Kahir, Md. Abdul,Islam, Md. Mazharul,Rahman, A.K.M. Anisur,Nahar, A.,Rahman, Md. Siddiqur,Son, Hee-Jong The Korean Society of Veterinary Service 2008 韓國家畜衛生學會誌 Vol.31 No.4
A cross-sectional study was undertaken to report prevalence and to identify risk factors of subclinical mastitis of dairy cattle in Sylhet district of Bangladesh. Among 325 dairy farms of the district 12 farms(3.7%) were selected conveniently for this study. All the dairy cows of the 12 farms were selected for sample collection. Fresh milk samples from each of the selected dairy cows were collected aseptically in separate sterilized test tube as RF, RH, LF and LH quarter of the udder. Rapid modified White Side Test(WST) was used to detect subclinical mastitis(SCM). Results of WST and data derived from filled in questionnaire were entered in Microsoft Excel 2003 and transferred to $STATA^{(R)}$, version 8.0/Intercooled(Stata Corporation, Texas, USA, 2003). The overall prevalence of SCM and its distribution in different categories of variables in cow and their exact binomial 95% confidence intervals were calculated in $STATA^{(R)}$. Simple bivariable associations among independent variables were investigated by $x^2$ test in $STATA^{(R)}$. Multiple logistic regression analysis with backward elimination method was used to identify risk factors of SCM. To identify significant variation in quarter SCM, linear regression analysis was performed after arcsine transformation of the data. The overall prevalence of SCM found in this study is 54%. Dairy cows with teat lesions had significantly increased SCM(OR=12342, P value=0.000, 95% CI=762, 199798) than others without teat lesions. The Holstein Friesian X Jersey X Sahiwal breed has significantly decreased(OR=0.18, p=0.03, 95% CI 0.04, 0.85) SCM than other breeds. The prevalence of SCM found in this study is in agreement with others. The injury in the teat increases the probability of getting infected with microbes and thereby mastitis. If the prevalence of teat lesion can be decreased the probability of subclinical mastitis will also be decreased. The negatively associated Holstein Friesian X Jersey X Sahiwall breed may help in planning mastitis control program if this finding can be validated by a more powerful case-control or cohort study design.
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Role of Growth Regulators in the Somatic Organogenesis of Haworthia Inflorescences in Vitro
Yesmin Reshma,Islam MD Mazharul,Hong-Yul Kim,Chang-kil Kim,Ki-Byung Lim 한국원예학회 2020 원예과학기술지 Vol.38 No.3
This study investigated the effect of growth regulators on the somatic organogenesis of Haworthia inflorescences. The inflorescences of five Haworthia cultivars and one species were cultured on 1X and 0.5X MS media with/without growth regulators for organogenesis. Shoot and callus induction was observed for three of the five cultivars, whereas only callus induction was observed for the other two cultivars and one species. Of the two growth regulator-free media used, all explants performed better on ½ fold MS medium than on 1 fold MS medium in terms of shoot and callus induction. Conversely, among the six media supplemented with kinetin and 6-benzylaminopurine (BA), there was no shoot formation; however, a different response in callus formation was observed for H. splendens and ‘White Wolf’. The callus induction of H. splendens was more vigorous than that of ‘White Wolf’. In this study, better organogenesis from young upper parts of the inflorescences was observed. The highest shoot and root multiplication was observed on NAA containing medium, and no root formation was observed on BA containing medium. The highest shoot multiplication (20.8 ± 0.29) was observed for ‘Tiffany × Fertenon B Com’ on 1.4 ㎎·L<SUP>-1</SUP> BA containing medium within 18 weeks, whereas, the highest root induction was observed for Haworthia ‘Natalie’ on medium containing 0.05 ㎎·L<SUP>-1</SUP> NAA. The results revealed that different parts of Haworthia inflorescences showed different organogenesis responses. Therefore, this study contributes to a better understanding of the organogenesis response of Haworthia cultivars on different media.
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