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1. Non-escaping frost tolerant QTL linked genetic loci at reproductive stage in six wheat DH populations

Author

Zhang, Jingjuan, Islam, MD Shahidul, Zhao, Yun, Anwar, Masood, Alhabbar, Zaid, She, Maoyun, Yang, Rongchang, Juhasz, Angela, Tang, Guixiang, Chen, Jiansheng, Liu, Hang, Jiang, Yanjie, Zhai, Shengnan, Hu, Xin, Rong, Junkang, Zhang, Yingquan, Qin, Yebo, Liu, Qier, Yu, Zitong, Zhang, Yujuan, Balotf, Sadegh, Dowla, Mirza, Afrin, Sonia, Roy, Nandita, Mallik, Md Resad, Us Saieed, Md Atik, Rahman, Shanjida, Sultana, Nigarin, Ahmed, Sarah Al-Sheikh, Florides, Chris, Chen, Kefei, Sharma, Darshan, Height, Nathan, Biddulph, Ben, Lu, Meiqin, Mayer, Jorge E., and Ma, Wujun

Published
2022
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5. Wheat photosystem II heat tolerance: evidence for genotype-by-environment interactions

Author

Coast, Onoriode, Posch, Bradley C., Rognoni, Bethany G., Bramley, Helen, Gaju, Oorbessy, Mackenzie, John, Pickles, Claire, Kelly, Alison M., Lu, Meiqin, Ruan, Yong-Ling, Trethowan, Richard, Atkin, Owen K., Coast, Onoriode, Posch, Bradley C., Rognoni, Bethany G., Bramley, Helen, Gaju, Oorbessy, Mackenzie, John, Pickles, Claire, Kelly, Alison M., Lu, Meiqin, Ruan, Yong-Ling, Trethowan, Richard, and Atkin, Owen K.

Abstract

SUMMARY High temperature stress inhibits photosynthesis and threatens wheat production. One measure of photosynthetic heat tolerance is Tcrit – the critical temperature at which incipient damage to photosystem II (PSII) occurs. This trait could be improved in wheat by exploiting genetic variation and genotype-by-environment interactions (GEI). Flag leaf Tcrit of 54 wheat genotypes was evaluated in 12 thermal environments over 3 years in Australia, and analysed using linear mixed models to assess GEI effects. Nine of the 12 environments had significant genetic effects and highly variable broad-sense heritability (H2 ranged from 0.15 to 0.75). Tcrit GEI was variable, with 55.6% of the genetic variance across environments accounted for by the factor analytic model. Mean daily growth temperature in the month preceding anthesis was the most influential environmental driver of Tcrit GEI, suggesting biochemical, physiological and structural adjustments to temperature requiring different durations to manifest. These changes help protect or repair PSII upon exposure to heat stress, and may improve carbon assimilation under high temperature. To support breeding efforts to improve wheat performance under high temperature, we identified genotypes superior to commercial cultivars commonly grown by farmers, and demonstrated potential for developing genotypes with greater photosynthetic heat tolerance.

Published
2022

6. Yield-Related QTL Clusters and the Potential Candidate Genes in Two Wheat DH Populations

Author

Zhang, Jingjuan, primary, She, Maoyun, additional, Yang, Rongchang, additional, Jiang, Yanjie, additional, Qin, Yebo, additional, Zhai, Shengnan, additional, Balotf, Sadegh, additional, Zhao, Yun, additional, Anwar, Masood, additional, Alhabbar, Zaid, additional, Juhász, Angéla, additional, Chen, Jiansheng, additional, Liu, Hang, additional, Liu, Qier, additional, Zheng, Ting, additional, Yang, Fan, additional, Rong, Junkang, additional, Chen, Kefei, additional, Lu, Meiqin, additional, Islam, Shahidul, additional, and Ma, Wujun, additional

Published
2021
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8. Yield-Related QTL Clusters and the Potential Candidate Genes in Two Wheat DH Populations

Author

Zhang, Jingjuan, She, Maoyun, Yang, Rongchang, Jiang, Yanjie, Qin, Yebo, Zhai, Shengnan, Balotf, Sadegh, Zhao, Yun, Anwar, Masood, Alhabbar, Zaid, Juhász, Angéla, Chen, Jiansheng, Liu, Hang, Liu, Qier, Zheng, Ting, Yang, Fan, Rong, Junkang, Chen, Kefei, Lu, Meiqin, Islam, Shahidul, Ma, Wujun, Zhang, Jingjuan, She, Maoyun, Yang, Rongchang, Jiang, Yanjie, Qin, Yebo, Zhai, Shengnan, Balotf, Sadegh, Zhao, Yun, Anwar, Masood, Alhabbar, Zaid, Juhász, Angéla, Chen, Jiansheng, Liu, Hang, Liu, Qier, Zheng, Ting, Yang, Fan, Rong, Junkang, Chen, Kefei, Lu, Meiqin, Islam, Shahidul, and Ma, Wujun

Abstract

In the present study, four large-scale field trials using two doubled haploid wheat populations were conducted in different environments for two years. Grain protein content (GPC) and 21 other yield-related traits were investigated. A total of 227 QTL were mapped on 18 chromosomes, which formed 35 QTL clusters. The potential candidate genes underlying the QTL clusters were suggested. Furthermore, adding to the significant correlations between yield and its related traits, correlation variations were clearly shown within the QTL clusters. The QTL clusters with consistently positive correlations were suggested to be directly utilized in wheat breeding, including 1B.2, 2A.2, 2B (4.9–16.5 Mb), 2B.3, 3B (68.9–214.5 Mb), 4A.2, 4B.2, 4D, 5A.1, 5A.2, 5B.1, and 5D. The QTL clusters with negative alignments between traits may also have potential value for yield or GPC improvement in specific environments, including 1A.1, 2B.1, 1B.3, 5A.3, 5B.2 (612.1–613.6 Mb), 7A.1, 7A.2, 7B.1, and 7B.2. One GPC QTL (5B.2: 671.3–672.9 Mb) contributed by cultivar Spitfire was positively associated with nitrogen use efficiency or grain protein yield and is highly recommended for breeding use. Another GPC QTL without negatively pleiotropic effects on 2A (50.0–56.3 Mb), 2D, 4D, and 6B is suggested for quality wheat breeding.

Published
2021

18. Contribution to Breadmaking Performance of Two Different HMW Glutenin 1AyAlleles Expressed in Hexaploid Wheat

Author

Roy, Nandita, Islam, Shahidul, Al-habbar, Zaid, Yu, Zitong, Liu, Hang, Lafiandra, Domenico, Masci, Stefania, Lu, Meiqin, Sultana, Nigarin, and Ma, Wujun

Abstract

Two expressed alleles of the 1Ay high-molecular-weight glutenin subunit (HMW-GS), 1Ay21*and 1AyT1, previously introduced in durum and bread wheat, were separately introgressed into the Australian bread wheat (Triticum aestivumL.) cv. Livingston. The developed lines had different allelic compositions compared to that of the parental cultivar (1Ax1), having either 1Ax21+1Ay21*or 1Ax1+1AyT1at the Glu-A1locus. Since 1Ax21and 1Ax1are known to have the same effects on quality, differences observed between the two sets of the developed lines are attributed to the two introgressed Aygenes. Yield and agronomic performance of the lines were evaluated in the field, and the protein, dough, and baking quality attributes were evaluated by large-scale quality testing. Results demonstrated that the subunit 1Ay21* increased unextractable polymeric protein by up to 14.3% and improved bread loaf volume by up to 9.2%. On the other hand, subunit 1AyT1increased total grain protein by up to 9% along with dough elasticity. Furthermore, milling extraction was higher, and flour ash was lower in the 1Ay21*lines compared to the lines integrating 1AyT1. Both sets of the 1Ay introgression lines reduced dough-mixing time compared to the recurrent parent Livingston. The results also showed that 1Ay21*had a higher potential to improve the baking quality than 1AyT1under the Livingston genetic background. Both alleles showed the potential to be utilized in breeding programs to improve the breadmaking quality.

Published
2021
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20. Application of case management model in prevention of deep vein thrombosis after surgery for cervical cancer.

Author

CHU Chunxia, QIN Yunxia, JU Xiaomei, QIU Xiaoli, ZHU Wei, and LU Meiqin

Subjects
VENOUS thrombosis, CERVICAL cancer, REHABILITATION, MEDICAL case management, CONTROL groups
Abstract

Objective To investigate the effect of case management model in prevention of deep vein thrombosis (DVT) after surgery for cervical cancer. Methods Totally 60 patients undergoing surgery for cervical cancer were assigned to the control group and the observation group, with 30 cases in each group. Patients in two groups received conventional care, and those in the observation received rehabilitation interventions based on case management model. The patients' compliance with rehabilitation intervention at home was evaluated. The incidence of DVT was compared between two groups. Results The compliance rates of wearing stretch socks, Ankle joint pump exercise, off-bed activity, isometric muscular contraction exercise and fluid intake in the observation group were higher than those in the control group (P <0.05). According to the color Doppler ultrasound, 4 cases in the control group and no patient in the observation group had developed DVT, with a significant difference (P < 0.05). Conclusion The case management model is effective to enhance the cervical cancer patients' compliance with rehabilitation interventions after surgery, therefore reducing the incidence of postoperative DVT. [ABSTRACT FROM AUTHOR]

Published
2019
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25. Wheat photosystem II heat tolerance: evidence for genotype‐by‐environment interactions

Author

Coast, Onoriode, Posch, Bradley C., Rognoni, Bethany G., Bramley, Helen, Gaju, Oorbessy, Mackenzie, John, Pickles, Claire, Kelly, Alison M., Lu, Meiqin, Ruan, Yong‐Ling, Trethowan, Richard, Atkin, Owen K., Coast, Onoriode, Posch, Bradley C., Rognoni, Bethany G., Bramley, Helen, Gaju, Oorbessy, Mackenzie, John, Pickles, Claire, Kelly, Alison M., Lu, Meiqin, Ruan, Yong‐Ling, Trethowan, Richard, and Atkin, Owen K.

Abstract

The effect of temperature on respiration photosystem II in wheat

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26. Wheat frost tolerant genes derived from QTLs of six DH populations in reproductive stage

Author

Zhang, Jingjuan, primary, Islam, Shahidul, additional, Zhao, Yun, additional, Anwar, Masood, additional, Alhabbar, Zaid, additional, She, Maoyun, additional, Yang, Rongchang, additional, Juhasz, Angela, additional, Tang, Guixiang, additional, Chen, Jiansheng, additional, Liu, Hang, additional, Jiang, Yanjie, additional, Zhai, Shengnan, additional, Hu, Xin, additional, Rong, JunKang, additional, Zhang, Yingquan, additional, Qing, Yebo, additional, Liu, Qier, additional, Yu, Zitong, additional, Zhang, Yujuan, additional, Balotf, Sadegh, additional, Dowla, Mirza, additional, Afrin, Sonia, additional, Roy, Nandita, additional, Mallik, Md, additional, Saieed, Md, additional, Rahman, Shanjida, additional, Sultana, Nigarin, additional, Ahmed, Sarah Alsheikh, additional, Florides, Chris, additional, Chen, Kefei, additional, Sharma, Darshan, additional, Height, Nathan, additional, Biddulph, Ben, additional, Lu, Meiqin, additional, Mayer, Jorge, additional, and Ma, Wujun, additional

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