Varietal replacement rate: Prospects and challenges for global food security

Singh, R. P.; Chintagunta, Anjani Devi; Agarwal, Dinesh; Kureel, R.S.; Kumar, Sanjay

doi:10.1016/j.gfs.2019.100324

Cited by 52 publications

(38 citation statements)

References 34 publications

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“…In case of maize, the average age of cultivars is 14-24 years in Kenya (Walker et al, 2015) and 18 years in sub-Saharan Africa (Witcombe et al, 2016). According to Singh et al (2020), farmer's preference for older varieties in India is evident from the quantity of breeder seed (BS) indented. It is observed that yield gains of these obsolete cultivars are severely deteriorating due to growing prevalence of extreme weather conditions and resurgence of new diseases and pests (Atlin et al, 2017).…”

Section: Accelerating Rates Of Varietal and Seed Replacementsmentioning

confidence: 99%

“…Extension activities also need attention for disseminating the information on the latest released varieties with the package of ª 2020 The Authors. Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley & Sons Ltd., 18, 2388-2405 practices clearly highlighting their unique advantages over the obsolete varieties (Atlin et al, 2017;Singh et al, 2020).…”

Section: Accelerating Rates Of Varietal and Seed Replacementsmentioning

confidence: 99%

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Genomic interventions for sustainable agriculture

Bohra

Jha

Godwin

et al. 2020

Plant Biotechnology Journal

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Agricultural production faces a Herculean challenge to feed the increasing global population. Food production systems need to deliver more with finite land and water resources while exerting the least negative influence on the ecosystem. The unpredictability of climate change and consequent changes in pests/pathogens dynamics aggravate the enormity of the challenge. Crop improvement has made significant contributions towards food security, and breeding climate-smart cultivars are considered the most sustainable way to accelerate food production. However, a fundamental change is needed in the conventional breeding framework in order to respond adequately to the growing food demands. Progress in genomics has provided new concepts and tools that hold promise to make plant breeding procedures more precise and efficient. For instance, reference genome assemblies in combination with germplasm sequencing delineate breeding targets that could contribute to securing future food supply. In this review, we highlight key breakthroughs in plant genome sequencing and explain how the presence of these genome resources in combination with gene editing techniques has revolutionized the procedures of trait discovery and manipulation. Adoption of new approaches such as speed breeding, genomic selection and haplotype-based breeding could overcome several limitations of conventional breeding. We advocate that strengthening varietal release and seed distribution systems will play a more determining role in delivering genetic gains at farmer's field. A holistic approach outlined here would be crucial to deliver steady stream of climate-smart crop cultivars for sustainable agriculture.

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Section: Accelerating Rates Of Varietal and Seed Replacementsmentioning

confidence: 99%

Section: Accelerating Rates Of Varietal and Seed Replacementsmentioning

confidence: 99%

Genomic interventions for sustainable agriculture

Bohra

Jha

Godwin

et al. 2020

Plant Biotechnology Journal

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“…Genetic enhancements made by crop improvement can Share of improved wheat varieties in breeder seed indent of UP during 2019-20 be translated into higher productivity with deployment of newly developed varieties. Among several approaches, improving varietal replacement rate (VRR) is one of the important factor in realizing higher crop productivity (Singh et al, 2019). The pace of progress in food production is largely depend upon the progress of seed programme that could able to supply good quality seed of high yielding varieties with superior genetics.…”

Section: Future Prospectsmentioning

confidence: 99%

Perspective of enhancing wheat production and productivity in Uttar Pradesh by improving varietal replacement rate

Sharma¹,

Mishra²,

Singh³

et al. 2020

Journal of Cereal Research

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“…India ranks rst in consumption, whereas in the world it is the second most consumed cereal next to maize (Chandusingh et al, 2017a;Tiwari et al, 2018). With the advent of Green Revolution, rice production in the country has not only doubled but also enabled self-su ciency (Chandusingh et al, 2017b;Singh et al, 2019). However, the demand for rice is still anticipated to escalate unequivocally in the coming future due to steady increase in population.…”

Section: Introductionmentioning

confidence: 99%

“…Several reports suggested that the rice production in Asian countries and India must be doubled by 2025 in order to encounter the hunger needs of exploding population (Hossain, 1996;Paroda, 1998). This implies that more than half of the population across the globe relies on the production and supply of rice, which ensures food and nutritional security (Bora et al, 2016;Bandumula, 2017;Singh et al, 2019). Since the land is scarce and expansion is not likely, achieving higher levels of production and productivity in rice is only feasible through adoption of high yielding and improved varieties.…”

Section: Introductionmentioning

confidence: 99%

Assessment of genetic purity in rice using polymorphic SSR markers

Kumar¹,

Susmita²,

Agarwal³

et al. 2020

Preprint

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Genetic purity is conventionally performed through Grow-Out-Test (GOT) with morphological characters. Simple sequence repeat (SSR) markers are independent of G X E interaction. Herewith, 16 high yielding varieties of rice were analyzed using 55 SSR markers for DNA fingerprinting and identification of genetic impurities: 14 were found to be polypmorphic and amplified 48 alleles with an average of 3.43 alleles per each primer pair. The number of alleles amplified ranged from 2 to 6 and the size of the PCR products amplified from these 14 primer pairs ranged from 80–450 bp with polymorphic information content (PIC) from 0.14 (RM 346) to 0.99 (RM 5900). PICs at 0.5 or higher are highly informative SSR markers for genetic studies, DNA fingerprinting and scoring polymorphism rate of SSR markers pertinent to specific locus. The 14 polymorphic SSR markers can be used for DUS testing, genetic purity and DNA finger printing of rice varieties.

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Varietal replacement rate: Prospects and challenges for global food security

Cited by 52 publications

References 34 publications

Genomic interventions for sustainable agriculture

Genomic interventions for sustainable agriculture

Perspective of enhancing wheat production and productivity in Uttar Pradesh by improving varietal replacement rate

Assessment of genetic purity in rice using polymorphic SSR markers

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