Enhancing Health Benefits in Grain Breeding Wheat, Barley, and Oats for Nutritional Components

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Uma Sharma¹ , M. Sekhar² , Umme Hanny³ , G. Jahirhussain⁴ , Saurabh⁵

¹College of Biotechnology, DUVASU Mathura 281003 Uttar Pradesh India.

²Department of Agronomy, CASAR Bharatiya Engineering Science and Technology Innovation University, Andhra Pradesh-India.

³Department of Nutrition and Dietetics, Bishop Cotton Women's Christian College, Mission Road, Bangalore Karnataka 560027, India.

⁴P.G and Research Department of Botany, Government Arts College (Autonomous), (Af iliated to Bharathidasan University, Tiruchirapalli-24), Karur- 639005, Tamil Nadu, India

⁵College of Community Science, BUAT, Banda, Uttar Pradesh 210001, India.

Corresponding Author Email: umasharma1988mtr@gmail.com

DOI : https://doi.org/10.51470/JPB.2022.1.2.20

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Introduction

Wheat, barley, and oats constitute fundamental components of human diets globally, providing essential carbohydrates, proteins, fibers, vitamins, and minerals. However, conventional breeding practices have primarily focused on yield and disease resistance, often neglecting nutritional quality. With the increasing prevalence of diet-related health issues, there is a pressing need to prioritize nutritional enhancement in grain breeding programs [1]. This article delves into the strategies and advancements in breeding wheat, barley, and oats to enrich their nutritional profiles, thereby contributing to global health and food security. Grain breeding stands at the forefront of agricultural innovation, aiming to address the nutritional needs of a rapidly growing global population. Wheat, barley, and oats, as primary cereals in agricultural systems worldwide, serve as indispensable sources of essential nutrients for billions of people. While traditional breeding efforts have historically focused on improving yield and disease resistance, there is a growing recognition of the need to prioritize the nutritional quality of these grains.

In the face of rising rates of malnutrition and diet-related health issues, enhancing the nutritional components of wheat, barley, and oats presents a compelling opportunity to promote public health and improve food security. This introduction sets the stage for exploring recent advancements and strategies in grain breeding aimed at enhancing the health benefits of these staple crops. Through a combination of biofortification techniques, genomic selection, and innovative breeding methodologies, researchers and breeders are working to elevate the nutritional content of wheat, barley, and oats. These efforts not only seek to increase the quantity of essential nutrients such as proteins, fibers, vitamins, and minerals but also aim to enhance their bioavailability and overall nutritional quality, delve into the intricacies of grain breeding for nutritional enhancement, it becomes apparent that interdisciplinary collaborations and sustainable agricultural practices are crucial for overcoming challenges and realizing the full potential of these initiatives [2]. By fostering dialogue and cooperation among plant breeders, geneticists, nutritionists, and food scientists, we can leverage collective expertise to develop grain varieties that not only meet the nutritional needs of diverse populations but also contribute to the resilience and sustainability of agricultural systems.

Biofortification, the process of enhancing the nutritional content of crops through conventional breeding or biotechnology, has emerged as a promising approach to address malnutrition. In wheat breeding, efforts have been directed towards increasing the content of essential amino acids, particularly lysine and tryptophan, to improve protein quality. Through traditional breeding methods and genetic engineering techniques, researchers have successfully developed wheat varieties with elevated protein content and improved amino acid profiles, enhancing their nutritional value. Barley, renowned for its high fiber content and beta-glucan, offers numerous health benefits, including reduced cholesterol levels and improved gastrointestinal health [3]. Breeding programs have focused on enhancing beta-glucan content and modifying the composition of dietary fibers to optimize health outcomes. Furthermore, biofortified barley varieties enriched with micronutrients such as iron and zinc hold promise in addressing micronutrient deficiencies prevalent in vulnerable populations.

Oats stand out for their exceptional nutritional profile, rich in soluble fibers, antioxidants, and phytochemicals. Breeding initiatives have aimed at increasing beta-glucan content, enhancing antioxidant levels, and improving agronomic traits for sustainable production. Additionally, genomic selection techniques have enabled breeders to expedite the development of high-yielding, nutritionally superior oat varieties tailored to diverse agroecological regions. Biofortification strategies represent a cornerstone in the quest to enhance the nutritional quality of staple crops like wheat, barley, and oats. Biofortification involves the deliberate breeding of crops to increase their concentration of essential vitamins and minerals, thereby addressing micronutrient deficiencies prevalent in many populations worldwide. In the context of wheat, barley, and oats, biofortification efforts have primarily focused on improving the content and bioavailability of key nutrients such as iron, zinc, protein, and dietary fibers. Wheat, as one of the most widely consumed grains globally, has been a focal point of biofortification initiatives. Traditional breeding methods, coupled with modern biotechnological approaches, have been employed to develop wheat varieties with enhanced iron and zinc content. Iron and zinc are vital micronutrients essential for various physiological functions, including immune function and cognitive development [4]. By increasing the bioavailability of these micronutrients in wheat grains, biofortification aims to address micronutrient deficiencies, particularly in vulnerable populations reliant on wheat-based diets.

Similarly, barley biofortification programs have aimed to elevate the concentrations of essential minerals such as iron and zinc, as well as enhance the content of dietary fibers, particularly beta-glucan. Beta-glucan, a soluble fiber abundant in barley, has been associated with numerous health benefits, including cholesterol reduction and improved glycemic control. Breeding efforts have sought to develop barley varieties with higher beta-glucan content and improved nutritional profiles to promote cardiovascular health and overall well-being. Oats, renowned for their exceptional nutritional profile, have also been targeted for biofortification to further enhance their health-promoting properties. In addition to increasing the content of beta-glucan, biofortification strategies for oats have focused on boosting the levels of antioxidants, vitamins, and minerals [5]. Antioxidants such as tocopherols and polyphenols contribute to the antioxidant capacity of oats, offering protection against oxidative stress and chronic diseases. Breeding programs have sought to develop oat varieties with superior antioxidant activity and enhanced nutritional value to meet the demands of health-conscious consumers.

Advances in biotechnology, including marker-assisted selection and genetic engineering, have facilitated the development of biofortified wheat, barley, and oats with improved nutritional profiles. By leveraging genetic diversity and cutting-edge breeding techniques, researchers and breeders continue to enhance the nutritional quality of these staple crops, contributing to improved public health and food security globally, biofortification strategies represent a promising approach to address malnutrition and improve the nutritional quality of wheat, barley, and oats [6]. By enhancing the content and bioavailability of essential nutrients, including minerals, proteins, and dietary fibers, biofortified grains offer a sustainable solution to combat hidden hunger and promote human health and well-being. Continued investment in research and breeding efforts is essential to realize the full potential of biofortification and ensure access to nutritious food for all [23-24].

Genomic Selection and Breeding Techniques

Advancements in genomics and molecular breeding have revolutionized grain breeding programs, enabling precise selection of desirable traits and accelerated cultivar development. High-throughput sequencing technologies and marker-assisted selection have facilitated the identification of genomic regions associated with key nutritional components, facilitating targeted breeding efforts. Integrating genomic selection with traditional breeding methods has expedited the development of elite grain varieties with enhanced nutritional attributes and agronomic performance [7]. Genomic selection and breeding techniques have revolutionized the field of plant breeding, enabling more precise and efficient selection of desirable traits in crops like wheat, barley, and oats. These advanced methodologies harness genomic information to expedite the breeding process, accelerate genetic gains, and develop superior varieties with enhanced agronomic performance and nutritional attributes [22].

In the context of wheat breeding, genomic selection has enabled breeders to predict the performance of individual plants based on their genetic makeup. High-throughput genotyping technologies, such as single nucleotide polymorphism (SNP) markers, facilitate the identification of genomic regions associated with important traits, including yield, disease resistance, and nutritional quality. By integrating genomic data with phenotypic information obtained through field trials and laboratory analyses, breeders can make informed decisions and select elite lines with desired characteristics for further breeding cycles [8]. Barley breeding has also benefited significantly from genomic selection and marker-assisted breeding techniques. The availability of high-density genetic maps and genomic resources has facilitated the identification of quantitative trait loci (QTL) governing key agronomic traits and nutritional components in barley. Through marker-assisted selection, breeders can introgress favorable alleles from wild and exotic germplasm into elite breeding lines, enhancing genetic diversity and trait variation [9]. Genomic selection approaches enable the simultaneous improvement of multiple traits, thereby accelerating the development of barley varieties with improved yield potential, disease resistance, and nutritional quality [21].

Oats, characterized by complex genomes and limited genomic resources compared to other cereals, have nonetheless seen advancements in genomic selection and breeding methodologies. Despite challenges in genome assembly and annotation, efforts are underway to leverage genomic tools and molecular markers to accelerate oat breeding programs. Genomic selection holds promise for enhancing trait prediction accuracy and accelerating genetic gain in oats, particularly for traits related to nutritional quality, disease resistance, and stress tolerance [10]. Integration of genomic selection with other breeding techniques, such as marker-assisted backcrossing and genome editing, offers new avenues for trait improvement and varietal development in wheat, barley, and oats. By leveraging the power of genomics, breeders can expedite the introgression of desirable traits, accelerate breeding cycles, and develop varieties tailored to diverse agroecological environments and consumer preferences, genomic selection and breeding techniques represent invaluable tools for enhancing the genetic potential and nutritional quality of wheat, barley, and oats. By harnessing genomic information and deploying innovative breeding strategies, researchers and breeders can develop improved varieties that address the evolving challenges of global agriculture, promote sustainable food production, and contribute to improved human health and nutrition [11]. Continued investment in genomics research and capacity-building efforts is essential to unlock the full potential of these technologies and ensure their widespread adoption in crop improvement programs worldwide [20].

Challenges and Opportunities

Despite significant progress, several challenges persist in breeding crops for enhanced nutritional components. Balancing nutritional enhancement with agronomic traits, maintaining genetic diversity, and ensuring consumer acceptance remain formidable tasks. Moreover, addressing environmental stressors and adapting breeding strategies to changing climatic conditions are paramount for sustainable agriculture. Interdisciplinary collaborations among plant breeders, geneticists, nutritionists, and food scientists are essential to overcome these challenges and harness the full potential of grain breeding for nutritional enhancement [12]. Furthermore, embracing sustainable agricultural practices, promoting genetic diversity, and engaging with stakeholders across the food value chain are critical for realizing the health and nutritional benefits of improved grain varieties. Interdisciplinary collaborations among plant breeders, geneticists, nutritionists, and food scientists are critical for overcoming these challenges and maximizing the impact of grain breeding programs. By fostering dialogue and cooperation across disciplines, researchers can leverage collective expertise to develop innovative solutions and unlock the full potential of grain breeding for nutritional enhancement, the complexities of global food systems and strive to achieve sustainable development goals, investing in research and innovation in grain breeding remains imperative [13]. By prioritizing nutritional quality, embracing sustainable agricultural practices, and engaging with stakeholders across the food value chain, we can ensure access to nutritious food for all and pave the way for a healthier and more resilient future, the journey to enhance the health benefits of wheat, barley, and oats through grain breeding is both a scientific endeavor and a humanitarian imperative [14-19]. Through continued collaboration, innovation, and commitment, we can harness the transformative power of grain breeding to improve human nutrition, promote sustainable agriculture, and build a more food-secure world for generations to come.

Conclusion

Grain breeding holds tremendous potential to enhance the nutritional quality of wheat, barley, and oats, contributing to improved public health and food security worldwide. Through biofortification, genomic selection, and interdisciplinary collaborations, breeders can develop nutritionally enriched varieties tailored to diverse dietary needs and environmental conditions. As we confront the complexities of global food systems and strive for sustainable development goals, investing in research and innovation in grain breeding for nutritional enhancement remains imperative, the quest to enhance the nutritional benefits of staple grains like wheat, barley, and oats stands as a critical endeavor in the pursuit of global food security and public health. Through innovative breeding strategies, including biofortification, genomic selection, and marker-assisted breeding techniques, significant progress has been made in improving the nutritional quality of these essential crops. Biofortification initiatives have successfully increased the concentrations of essential vitamins, minerals, and dietary fibers in wheat, barley, and oats, addressing micronutrient deficiencies and promoting better health outcomes, particularly in vulnerable populations. By leveraging traditional breeding methods and cutting-edge biotechnological approaches, researchers and breeders have developed biofortified varieties with enhanced nutritional profiles, contributing to improved human nutrition and well-being.

Genomic selection and breeding techniques have revolutionized plant breeding programs, enabling more precise and efficient selection of desirable traits in wheat, barley, and oats. By integrating genomic information with phenotypic data, breeders can expedite the development of high-yielding varieties with improved agronomic performance and nutritional attributes. These advanced methodologies offer opportunities to accelerate genetic gains, enhance stress tolerance, and address emerging challenges in global agriculture. Despite the remarkable progress achieved, challenges remain in the pursuit of nutritional enhancement in grain breeding. Balancing the nutritional improvement with agronomic traits, maintaining genetic diversity, and ensuring consumer acceptance are ongoing considerations that require careful attention. Moreover, adapting breeding strategies to address environmental stressors and changing climatic conditions is essential for sustainable agriculture and food production.

References

1. Loskutov, I. G., & Khlestkina, E. K. (2021). Wheat, barley, and oat breeding for health benefit components in grain. Plants, 10(1), 86.
2. Loskutov, I. G., & Khlestkina, E. K. (2021). Wheat, barley, and oat breeding for health benefit components in grain. Plants 2021, 10, 86. Advances in Cereal Crops Breeding, 5.
3. Stewart, D., & McDougall, G. (2014). Oat agriculture, cultivation and breeding targets: implications for human nutrition and health. British Journal of Nutrition, 112(S2), S50-S57.
4. Shvachko, N. A., Loskutov, I. G., Semilet, T. V., Popov, V. S., Kovaleva, O. N., & Konarev, A. V. (2021). Bioactive components in oat and barley grain as a promising breeding trend for functional food production. Molecules, 26(8), 2260.
5. Shewry, P. R. (2009). The HEALTHGRAIN programme opens new opportunities for improving wheat for nutrition and health.
6. Gazal, A., Dar, Z. A., Zaffar, G., Lone, A. A., Abidi, I., Shabir, A., & Yousuf, N. (2014). Trends in breeding oat for nutritional grain quality-An overview. Journal of Applied and Natural Science, 6(2), 904-912.
7. Biel, W., Kazimierska, K., & Bashutska, U. (2020). Nutritional value of wheat, triticale, barley and oat grains. Acta Scientiarum Polonorum Zootechnica, 19(2), 19-28.
8. Vadim, P., Igor, L., & Alena, S. (2020). Biological role and health benefits of antioxidant compounds in cereals. Biological Communications, 65(1), 53-67.
9. Shewry, P. R., Charmet, G., Branlard, G., Lafiandra, D., Gergely, S., Salgó, A.,& Ward, J. L. (2012). Developing new types of wheat with enhanced health benefits. Trends in Food Science & Technology, 25(2), 70-77.
10. Baik, B. K., & Ullrich, S. E. (2008). Barley for food: Characteristics, improvement, and renewed interest. Journal of cereal science, 48(2), 233-242.
11. Dykes, L., & Rooney, L. W. (2007). Phenolic compounds in cereal grains and their health benefits. Cereal foods world, 52(3), 105-111.
12. Bartłomiej, S., Justyna, R. K., & Ewa, N. (2012). Bioactive compounds in cereal grains–occurrence, structure, technological significance and nutritional benefits–a review. Food Science and Technology International, 18(6), 559-568.
13. Shewry, P. R., & Hey, S. J. (2015). The contribution of wheat to human diet and health. Food and energy security, 4(3), 178-202.
14. Wenefrida, I., Utomo, H. S., Blanche, S. B., & Linscombe, S. D. (2009). Enhancing essential amino acids and health benefit components in grain crops for improved nutritional values. Recent Patents on DNA & Gene Sequences (Discontinued), 3(3), 219-225.
15. Liu, R. H. (2007). Whole grain phytochemicals and health. Journal of cereal science, 46(3), 207-219.
16. Arzani, A., & Ashraf, M. (2017). Cultivated ancient wheats (Triticum spp.): A potential source of health‐beneficial food products. Comprehensive Reviews in Food Science and Food Safety, 16(3), 477-488.
17. Arzani, A., & Ashraf, M. (2017). Cultivated ancient wheats (Triticum spp.): A potential source of health‐beneficial food products. Comprehensive Reviews in Food Science and Food Safety, 16(3), 477-488.
18. Ward, J. L., Poutanen, K., Gebruers, K., Piironen, V., Lampi, A. M., Nyström, L.,& Shewry, P. R. (2008). The HEALTHGRAIN cereal diversity screen: concept, results, and prospects. Journal of Agricultural and Food Chemistry, 56(21), 9699-9709.
19. Ahmad, M., Dar, Z. A., & Habib, M. (2014). A review on oat (Avena sativa L.) as a dual-purpose crop. Scientific Research and Essays, 9(4), 52-59.
20. Clemens, R., & van Klinken, B. J. W. (2014). Oats, more than just a whole grain: an introduction. British journal of nutrition, 112(S2), S1-S3.
21. Gorash, A., Armonienė, R., Mitchell Fetch, J., Liatukas, Ž., & Danytė, V. (2017). Aspects in oat breeding: nutrition quality, nakedness and disease resistance, challenges and perspectives. Annals of Applied Biology, 171(3), 281-302.
22. Călinoiu LF, Vodnar DC. Whole Grains and Phenolic Acids: A Review on Bioactivity, Functionality, Health Benefits and Bioavailability. Nutrients. 2018; 10(11):1615. https://doi.org/10.3390/nu10111615
23. Saleh, A. S., Wang, P., Wang, N., Yang, S., & Xiao, Z. (2019). Technologies for enhancement of bioactive components and potential health benefits of cereal and cereal-based foods: Research advances and application challenges. Critical reviews in food science and nutrition, 59(2), 207-227.
24. Blake, T., Blake, V. C., Bowman, J. G., & Abdel-Haleem, H. (2011). Barley feed uses and quality improvement. Barley: production, improvement, and uses, 522-531.