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Mingju Li
Yunnan Key Laboratory of Green Prevention and Control of Agricultural Transboundary Pests, Agricultural Environment and Resource Research Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, China

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Journal article
Published: 23 August 2021 in Plants
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The stripe rust of wheat is one of the devastating diseases in China, which is caused by fungus Puccinia striiformis f. sp. tritici (Pst). The Yunnan Province of China is located in the south-western part, and holds distinctive geographical and climate features, while wheat growth and epidemics of stripe rust fungus are fully dissimilar to the major wheat-growing regions of China. It is important to discover its origin and migration to control the disease. In this study, 352 isolates were sampled from 11 spots of the Yunnan Province during the wheat growing season from 2004 to 2015 and analyzed with SNPs markers of housekeeping genes. Results revealed that 220 haplotypes were inferred from the concatenating sequences; among them, 5 haplotypes (viz., ‘H86′, ‘H18′, ‘H8′, ‘H15′ and ‘H23′) comprised over 24.5% of the population. The haplotype diversity, nucleotide diversity, mutation rate and recombination events were 0.992, 6.04 × 10−3, 4.46 × 10−3 and 18.0 respectively, which revealed the genetic diversity of Pst populations among all locations. Four grouping methods, such as UPGMA-tree, PCA, PLS-DA and STRUCTURE, were employed for the categorization of the Pst populations conferring to their races and topographical localities. All methods were found significant and mostly had co-linear relations with each other. The analysis of molecular variance (AMOVA) conferred total variation was 9.09%, and 86.20% of variation was within the populations. The current study also exposed a comparatively high genetic multiplicity within the population, while low genetic inconsistency among the populations. Furthermore, the molecular records on the gene pole (Nm = 18.45) established that the migration of the stripe rust pathogen occurred among all locations in Yunnan province. The ancestral haplotype was detected in Yuxi. Based on the trajectories of upper airflow and genetic diversity of Pst populations in different locations, it is suggested that the locations Dehong, Dali, Lincang and Baoshan are probably a major source of Pst in Yunnan.

ACS Style

Ashraful Alam; Haoxing Li; Akbar Hossain; Mingju Li. Genetic Diversity of Wheat Stripe Rust Fungus Puccinia striiformis f. sp. tritici in Yunnan, China. Plants 2021, 10, 1735 .

AMA Style

Ashraful Alam, Haoxing Li, Akbar Hossain, Mingju Li. Genetic Diversity of Wheat Stripe Rust Fungus Puccinia striiformis f. sp. tritici in Yunnan, China. Plants. 2021; 10 (8):1735.

Chicago/Turabian Style

Ashraful Alam; Haoxing Li; Akbar Hossain; Mingju Li. 2021. "Genetic Diversity of Wheat Stripe Rust Fungus Puccinia striiformis f. sp. tritici in Yunnan, China." Plants 10, no. 8: 1735.

Journal article
Published: 05 November 2019 in Journal of Integrative Agriculture
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Genetic diversity is the base of any genetic improvement breeding program aimed at stress breeding. The variability among breeding materials is of primary importance in the achievements of a good crop production. Herein, 105 wheat genotypes were screened against drought stress using factorial completely randomized design at seedling stage to determine the genetic diversity and traits association conferring drought tolerance. Analysis of variances revealed that all the studied parameters differed significantly among all genotypes, indicating the significance genetic variability existed among all genotypes for studied indices. The 10 best performance genotypes G1, G6, G11, G16, G21, G26, G39, G44, G51, and G61 were screened as drought tolerant, while five lowest performance genotypes G3, G77, G91, G98, and G105 were screened as drought susceptible. Root length, chlorophyll a, chlorophyll b, and carotenoid contents were significantly correlated among themselves which exhibited the importance of these indices for rainfed areas in future wheat breeding scheme. Shoot length exhibited non-significant and negative association with other studied traits, and its selection seems not to be a promising criteria for this germplasm for drought stress. Best performance genotypes under drought stress conditions will be useful in future wheat breeding program and early selection will be effective for developing high yielding and drought tolerant wheat varieties.

ACS Style

Hafiz Ghulam Muhu-Din Ahmed; Abdus Salam Khan; Ming-Ju Li; Sultan Habibullah Khan; Muhammad Kashif. Early selection of bread wheat genotypes using morphological and photosynthetic attributes conferring drought tolerance. Journal of Integrative Agriculture 2019, 18, 2483 -2491.

AMA Style

Hafiz Ghulam Muhu-Din Ahmed, Abdus Salam Khan, Ming-Ju Li, Sultan Habibullah Khan, Muhammad Kashif. Early selection of bread wheat genotypes using morphological and photosynthetic attributes conferring drought tolerance. Journal of Integrative Agriculture. 2019; 18 (11):2483-2491.

Chicago/Turabian Style

Hafiz Ghulam Muhu-Din Ahmed; Abdus Salam Khan; Ming-Ju Li; Sultan Habibullah Khan; Muhammad Kashif. 2019. "Early selection of bread wheat genotypes using morphological and photosynthetic attributes conferring drought tolerance." Journal of Integrative Agriculture 18, no. 11: 2483-2491.

Journal article
Published: 05 May 2019 in Sustainability
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Diminishing water resources as a result of excessive use of water for irrigation and climate change posture a severe global threat to food security. Herein, an experiment was conducted to determine the selection criteria for drought-tolerant bread wheat genotypes at the seedling stage using morphological and photosynthetic pigmentation-related traits. A panel of 105 wheat landraces, historical Pakistani varieties, and advance breeding lines were evaluated under normal and drought stress using factorial completely randomized design. The root length, fresh weight, dry weight, cell membrane thermo-stability, and chlorophyll b were positively correlated among themselves under both normal and stress conditions. Hence, selection of any one of these traits enhances the performance of other traits. The shoot length was non-significant and negatively associated with all other studied characters except relative water content. The results suggested that selection for shoot length could not improve genetic gain for drought tolerance. Out of 10 principal components (PCs), the first three PCs were showed significant genetic variation under both conditions. The first three PCs showed 74.6% and 76% cumulative genetic variation under normal and drought conditions, respectively. Based on PCA, 10 drought-tolerant and five drought-susceptible genotypes were identified. Overall results suggested that selection for root length, fresh weight, dry weight, cell membrane thermo-stability, and chlorophyll b at the seedling stage would improve genetic gain for drought tolerance. The outperforming genotypes under drought stress conditions can be useful in future wheat breeding programs, and early selection for the traits recommended in this study will be effective for developing high-yielding and drought-tolerant wheat varieties.

ACS Style

Hafiz Ahmed; Muhammad Sajjad; Mingju Li; Muhammad Azmat; Muhammad Rizwan; Rana Maqsood; Sultan Khan. Selection Criteria for Drought-Tolerant Bread Wheat Genotypes at Seedling Stage. Sustainability 2019, 11, 2584 .

AMA Style

Hafiz Ahmed, Muhammad Sajjad, Mingju Li, Muhammad Azmat, Muhammad Rizwan, Rana Maqsood, Sultan Khan. Selection Criteria for Drought-Tolerant Bread Wheat Genotypes at Seedling Stage. Sustainability. 2019; 11 (9):2584.

Chicago/Turabian Style

Hafiz Ahmed; Muhammad Sajjad; Mingju Li; Muhammad Azmat; Muhammad Rizwan; Rana Maqsood; Sultan Khan. 2019. "Selection Criteria for Drought-Tolerant Bread Wheat Genotypes at Seedling Stage." Sustainability 11, no. 9: 2584.