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- 저자 : Ravi Shekhar (검색결과 2 건)
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Paradoxes of South Asian Security
Rajiv Nayan,Ravi Shekhar 서울대학교 통일평화연구원 2020 Asian Journal of Peacebuilding Vol.8 No.2
South Asia as a security zone is full of puzzles. The enigmatic character of South Asia is comprised its evolving nature, the complex conceptualization of its dominant security challenges, and the difficulty of finding solutions to these challenges. Some common security challenges that South Asian countries face require global solutions. The nuclear conundrum of India and Pakistan can only be solved by global solutions because of the complexity posed by the nuclear weapon countries located outside South Asia. Similarly, cyber security is a borderless problem. South Asian countries may manage their security challenges like terrorism with a cooperative framework, yet the increasing global connection to these regional problems complicates the search for solutions.
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Saurabh Badoni,Reeku Chaudhary,Ravi Shekhar,Shweta Badoni,Ekhlaque Ahmad,Rishi Pal Gangwar,Kashi Nath Tiwari,Rajendra Singh Rawat,Deepshikha,Jai Prakash Jaiswal 한국작물학회 2017 Journal of crop science and biotechnology Vol.20 No.5
Stripe rust of wheat caused by the fungal pathogen is a destructive foliar disease of wheat. Thus, it is crucial step to characterize the resistant germplasm for stripe rust in a diverse germplasm pool for their ultimate utilization in efficient crop rust resistance breeding. In the present study, we followed two pronged strategies involving integrated phenotypic and molecular characterization of 440 diverse wheat germplasm lines for rust resistance. The germplasm panel was extensively evaluated in field epiphytotic conditions during two consecutive years. After rigorous screening, 72 accessions were successfully revealed as resistant to moderately resistant to stripe rust. Subsequently, entries were then evaluated for their field agronomicperformances, considering prerequisites for serving as a donor germplasm,particularly for yield and 33 potential rust-resistant accessions were identified. Furthermore, to detect the sources of resistance, accessions were molecular characterized for potential race-specific resistance genes Yr5, Yr10,Yr15, and effective adult plant resistance (APR) gene Lr34/Yr18/pm38. We identified the 22 accessions possessing one or more single resistance genes and two accessions were observed with at least three of them. Moreover, Lr34/Yr18/pm38 was determined to confer resistance when observed along with any of the race-specific genes. Thus, the study not only provides proof of concept methodology to identify candidate resistant sources from large germplasm collections but simultaneouslyconfirmed the contribution of combining race-specific andnon-specific APR genes. The finding could further assist in the potential deployment of resistant genes directly into the stripe rust breeding program by involving marker-assisted approaches.
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