Analysis of genotypic variation for normalized difference vegetation index and its relationship with grain yield in winter wheat under terminal heat stress     

Shahnoza Hazratkulova  Ram C. Sharma  Safar Alikulov  Sarvar Islomov  Tulkin Yuldashev  Zafar Ziyaev  Zakir Khalikulov  Zokhid Ziyadullaev  Jozef Turok 《Plant Breeding》2012,131(6):716-721

Normalized difference vegetation index (NDVI), which is a measure of leaf greenness (chlorophyll content), is considered to be correlated with crop productivity. This study was conducted to examine genotypic variations for NDVI at different growth stages and its relationship to yield in winter wheat under terminal heat stress. Thirty winter wheat genotypes were evaluated at two locations in 2009–2010 and 2010–2011 in Uzbekistan. The NDVI was recorded at booting, heading, milk and dough stages. The wheat genotypes differed significantly for NDVI at each stage. Grain yield ranged from 3.9 to 6.1 t/ha. Wheat genotypes differed in per cent decline in NDVI from booting to dough stage. However, several high‐yielding genotypes maintained higher NDVI than low‐yielding genotypes when heat stress was evident. The findings suggest change in NDVI during heat stress could be a measure of tolerance. The positive correlation of NDVI with grain yield suggests that it could be used as an indirect selection criterion for identifying physiologically superior, high‐yielding wheat lines under terminal heat stress.  相似文献   

A simple method for assessing leaching risk of bacteria through soils     

A. Hossain  J. Townend  K. Killham 《Soil Use and Management》2000,16(1):71-73

Abstract. Bacterial contamination of water is a problem worldwide and is often acute in developing countries where human and animal waste is disposed of on land for use as fertilizer or because of poorly developed sanitation systems. Studying leaching risk through soils is difficult when no suitable microbiological laboratory is available. A method using the movement of ZnO particles through soils as a surrogate for studying bacteria directly was tested. ZnO particles with a similar size to bacteria can readily be detected by chemical analysis. For a range of nine different soil textures, leaching rates of ZnO particles under near saturated conditions were significantly correlated with leaching rates of Escherichia coli cells ( P =0.013). For both ZnO and E. coli , leaching was generally greatest through fine textured soils.  相似文献   

The Attempted Transfer of Male Sterility from the Cornerstone Mutant of Tetraploid Wheat to Diploid Wheat     

M. Azhar  Hossain 《Plant Breeding》1989,102(2):105-108

An attempt was made to transfer male-sterility, mslc, from the Cornerstone mutant of tetraploid wheat to diploid wheat. The N-banding technique revealed that chromosome 4 A of tetraploid wheat does not pair with chromosome 4 of diploid wheat in triploid F₁ hybrids: consequtntly the transfer of male-sterility gene(s) from tetraploid wheat to diploid was not successful. The culchiane induced ampliploids possessing AAAABB in mslc background were fully fertile indicating the complete compensation of mslc by the newly introduced A genome of T. monocaccum. The fertility compensating gene(S) presumably located on chromosome 4 of diploid wheat may be used to produce hybrid wheat by the XYZ system.  相似文献   

Stability of performance in lentil (Lens culinaris Medik) genotypes in Iran     

Mehdi Mohebodini  Hamid Dehghani  Sayyed Hossain Sabaghpour 《Euphytica》2006,149(3):343-352

The development of genotypes, which can be adapted to a wide range of diversified environment, is the ultimate goal of plant breeders in a crop improvement program. In this study, several stability methods were used to evaluate the genotype by environment interaction (GE) in 11 lentil (Lens culinaris Medik) genotypes. The genotypes were evaluated for grain yield at 4 different locations for 3 years in semi arid areas of Iran. The testing locations have different climatic and edaphic conditions providing the conditions necessary for the assessment of stability. A combined analysis of variance, stability statistics, rank correlations among stability statistics and yield stability statistic were determined. Significant differences were detected between genotypes and their GE interactions. Different univariate stability parameters were used to determine stability of the studied genotypes. The level of association among the parameters was assessed using Spearman's rank correlation. The different stability statistics which measured the different aspects of stability was substantiated by rank correlation coefficient. Rank-correlation coefficients between yield and some stability parameters were highly significant. Genotypes mean yield (Mean) was significantly correlated to the Lin and Binns stability parameter PI (r = 0.93^{* *}í) and desirability index Di (r = 0.89^{* *}í). A principal component analysis based on rank correlation matrix was performed for grouping the different stability parameters studied. In conclusion, based on most stability parameters, the genotypes G2, G5 and G9 were found to be the most stable. Results from rank correlation and principal component analysis showed that the stability variance (σ_i ²) was strongly correlated with Wricke's ecovalance, stability parameters of Plaisted and Peterson, and Plaisted.  相似文献   

Molecular mapping of Asian soybean rust resistance in Chinese and Japanese soybean lines,Xiao Jing Huang,Himeshirazu, and Iyodaizu B     

Naoki Yamanaka  Md. Motaher Hossain  Yuichi Yamaoka 《Euphytica》2015,205(2):311-324

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Prevention of leaf yellowing in Asian soybean rust infected plants is associated with green cotyledon color and the infection index     

Naoki Yamanaka  Noelle Giacomini Lemos  Romina Chávez Jara  Md Motaher Hossain  Kazuhiro Suenaga  Yuichi Yamaoka 《Euphytica》2015,205(2):475-482

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Somaclonal variation of regenerated plants in chili pepper (Capsicum annuum L.)     

Md. Amzad Hossain  Kunihiko Konisho  Mineo Minami  Kazuhiro Nemoto 《Euphytica》2003,130(2):233-239

The morphological and genetic variations in somaclones of chili pepper (Capsicumannuum L.) derived from tissue culture were evaluated. Cotyledonary node explants of cultivars, Shishitou and Takanotsume, were cultured on Murashige and Skoog (MS) medium supplemented with benzyladenine (BA)5 mg/l for shoots regeneration and regenerated shoots were rooted on MS medium supplemented with naphthalene acetic acid(NAA) 0.1 mg/l and indol-3-butyric acid(IBA) 0.05 mg/l. The regenerated plants(R₀) were selfed to obtain seeds for next generation (R₁ lines). Qualitative characters were studied in R₀generation and both qualitative and quantitative characters were studied in R₁ generation. In R₀ generation, variations were noticed in plant growth habit, stem color, flower color and color of unripe fruits, and expression of anthocyanin in unripe fruits. Comparison among the R₁ lines and their parents were made for morphological and agronomic characters. Significant variation among R₁ lines and differences between R₁ lines and their parents were observed. Genetic variations among three somaclones were revealed by random amplified polymorphic DNA (RAPD) analysis. Variation, such as early flowering and increase of yield components, is an indication of the response to selection for any specific character. Occurrence of productive variants among somaclones of established cultivars, like Shishitou and Takanotsume, indicates the possibility of their improvement through somaclonal variation. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Lead and Zinc Extraction Potential of Two Common Crop Plants, Helianthus Annuus and Brassica Napus     

Mahmoud Solhi  Hossain Shareatmadari  Mohammad A. Hajabbasi 《Water, air, and soil pollution》2005,167(1-4):59-71

Phytoextraction is a remediation technology that uses plants to remove heavy metals from soil. The success of a phytoextraction process depends on adequate plant yield (aerial parts) and high metal concentrations in plant shoots. A pot experiment was conducted to investigate the combination effects of plants [sunflower (Helianthus annuus) and canola (Brassica napus)] with soil treatments (manure, sulfuric acid and DTPA). Treatments, including two plants and seven soil treatments, which applied according to completely randomized factorial design with three replications. The largest shoot dry weight biomass production occurred in manure treatments for both plants. The maximum shoot concentrations of Pb and Zn were 234.6 and 1364.4 mg kg^?1 respectively in three mmoles DTPA kg^?1 treatment of sunflower. Furthermore the results showed that sunflower had a higher extracting potential for removal of Pb and Zn from polluted soil.  相似文献   

A major variation in the virulence of the Asian soybean rust pathogen (Phakopsora pachyrhizi) in Bangladesh     

Md. Motaher Hossain  Laboni Yasmin  Md. Tanbir Rubayet  Hajime Akamatsu  Naoki Yamanaka 《Plant pathology》2022,71(6):1355-1368

Asian soybean rust (ASR) caused by Phakopsora pachyrhizi is a major threat to soybean production in Bangladesh. Understanding the yearly changes and the current status of pathogenic structures is essential for developing appropriate breeding strategies for obtaining ASR-resistant soybean lines. Thirty-four P. pachyrhizi samples were collected from ASR hotspot areas (Chandpur, Lakshmipur, Noakhali, Barisal and Bhola districts) of Bangladesh in 2018 and 2019 and evaluated for pathogenicity on 12 soybean differential lines. The tested samples showed similar and dissimilar pathogenicity patterns on the differentials, yielding 21 distinct pathotypes. The cluster analysis, principal coordinate analysis and principal component analysis of the disease phenotypes of 47 samples collected in 2016, 2018 and 2019 indicated a higher pathogenic diversity and virulence variation in the P. pachyrhizi samples of 2018 and 2019 compared to that of 2016. The pathogenicity profiles of the Bangladeshi P. pachyrhizi samples appeared distinct from those of Argentinian and Brazilian samples, but showed slight similarities with Japanese, Mexican and Paraguayan samples. Furthermore, none of the resistance genes for P. pachyrhizi (Rpp genes) was solely effective against all the tested samples from 2018 and 2019, while samples (BdRP-48, BdRP-56 and BdRP-58) virulent to all Rpp1–Rpp6 genes were detected. The Rpp-pyramided line No6–12–1, carrying Rpp2, Rpp4 and Rpp5, was capable of conferring robust resistance to these virulent samples. Altogether, these results indicate an increase in the virulence of the current ASR pathogen in Bangladesh, which can be resolved by pyramiding different resistance genes in soybean cultivars.  相似文献   

A collision tumor consisting of granular cell tumor and adenocarcinoma in the uterus of an aged djungarian hamster     

Golbar HM  Izawa T  Kuwamura M  Okamura K  Fujita D  Tagami Y  Sasai H  Yamate J 《Journal of toxicologic pathology》2011,24(4):233-237

A neoplastic nodular lesion consisting of an admixture of granular cell tumor and adenocarcinoma was found in the uterus of a 26-month-old Djungarian hamster. Neoplastic cells of the uterine adenocarcinoma showed an epithelial nature in their growth patterns and by cytokeratin-immunopositive reaction, exhibiting nuclear pleomorphism. The granular cells had an abundant amount of fine granular eosinophilic cytoplasm and eccentric or central nuclei with no nuclear atypia; the granular structures were positive for periodic acid-Schiff with diastase resistance and were confirmed as lysosomes/autophagosomes by electron microscopy; immunohistochemically, the cells reacted to desmin, vimentin and α-smooth muscle actin and negatively for neurogenic, histiocyte/macrophage or epithelial markers, indicating smooth muscle origin. Because these tumors were generated from different cell origins, a diagnosis of collision tumor was made.  相似文献