This volume presents part of the proceedings of NERC 2022, with an emphasis on conservation of bio-diversity in North-east India. This is a highly challenging and involved topic due to regionally diverse physiographic, geographical and eco-climatic conditions. Henceforth, systemic and holistic frameworks are required to disseminate upon the potential of science and technology for the conservation of the region’s bio-diversity. Notable among these frameworks refers to plant, microbial and animal bio-diversity conservation, value-added product development and sharing the benefits of such research for the perspective of bio-prospects, analysing critical environmental and climatic factors and their sensitivity upon urbanization strategies. Tools that are to be deployed for such insights involve plant, animal, and microbial bioscience and biotechnology, generalized rules for product design and development and survey based strategies. Addressing relevant competent methodologies and generic pedagogies, this volume on the bio-diversity conservation in North-eastern states of India aims to demonstrate the potential of pragmatic strategies that can be applied for the bio-diversity conservation in any region of world. Thereby, opportunities for nature linked livelihood security can be sought for the long term wellbeing of the humankind and ecology.

The agricultural paradigm is already undergoing a shift in focus from food security towards nutritional quality. Horticultural crops besides improving biological productivity and nutritional standards also have enormous export potential. This group of crops comprising fruits, vegetables, root and tuber crops, plantation crops, medicinal and aromatic plants, spices and condiments and ornamental crops, would constitute core of any such agro-economic strategy. In addition to supplementing the economy and national food grid by providing fresh and processed fruits, vegetable, nuts etc., horticultural crops also help to promote diversification. Depletion of plant genetic resources in areas of diversity at a rapid pace is a matter of global concern. This book profiles all scientific management aspects of the horticultural crop genetic resources including their diversity, conservation and sustainable utilization. It also addresses vital concerns regarding management of horticultural crop genetic resources from diverse perspectives and provides recommendations for action in certain areas of research that must be pursued with intensity. The publication would serve as a valuable comprehensive scientific reference for breeders, researchers, teachers, students and policy makers in biology and agriculture.

This book provides a comprehensive overview of the wild relatives of crops and cultivated species found in India, covering their distribution, phylogenetic relationships with cultivated species, traits that are of economic and breeding value, and the perceived threats. It highlights the opportunities the wild relatives of cultivated species offer in terms of new genes and allelic variability, as well as several other exploitable economic and environmental benefits that can be harnessed with their conservation and cultivation. This helps facilitate their use – both directly and as part of the breeding program for related cultivated species, filling the gaps of genetic variability in the primary gene pool. It also discusses how they can be used in breeding programs using conventional technologies and the biotechnological approaches of recombinant DNA. Transfer of natural genes using recombinant DNA, known as “Cisgenesis,” can accelerate the process of incorporating these natural genes without genetic drag of undesirable features and biosafety concerns, and beyond taxonomic boundaries, in response to the demand for new cultivars to meet the challenges of climate change and ever-growing human population.

This book reviews how the release of the citrus genome facilitates the investigation of ancestral species, the study of their complex biological features, and the genetic basis of agronomic traits of paramount importance for their sustainable cultivation. The first chapters discuss citrus origin and distribution, and the economic importance and varietal composition of the cultivated species, providing an overview of citrus and related genera genetic resources. The book then describes the role of traditional breeding techniques (for scion and rootstocks) as well as the potential of genomic breeding and innovative protocols for biotechnological approaches. The second part provides essential information on the genus Citrus, the attributes of pure citrus species, genetic admixtures, hybrids and citrus relatives, and on the horticultural classification of cultivated species, varieties and rootstocks. The third part then focuses on the different molecular mechanisms, covering various aspects of citrus biology, including the role of beneficial compounds of citrus fruits. In addition, it examines the molecular responses of citrus to abiotic stresses and to field and post-harvest diseases. Providing insights gained in recent years, it is a valuable guide for those who are interested in gene discovery, comparative genomics, molecular breeding and new breeding techniques. It is particularly useful for scientists, breeders and students at universities and public sector institutes involved in research for the citrus industry.

Crop wild relatives (CWR) are plant species which are more or less closely related to crops. They are a vital resource by providing a pool of genetic variation that can be used in breeding new and better adapted varieties of crops that are resistant to stress, disease, drought and other factors. They will be increasingly important in allowing crops to adapt to the impacts of climate, thus safeguarding future agricultural production. Until recently, the main conservation strategy adopted for CWR has been ex situ - through the maintenance of samples as seed or vegetative material in various kinds of genebank or other facilities. Now the need to conserve CWR in their natural surroundings (in situ) is increasingly recognized. Recent research co-ordinated by Bioversity International has produced a wealth of information on good practices and lessons learned for their effective conservation. This book captures the important practical experiences of countries participating in this work and describes them for the wider conservation community. It includes case studies and examples from Armenia, Bolivia, Madagascar, Sri Lanka and Uzbekistan, which are important centres of diversity for crop wild relatives, and covers four geographical regions - the Caucasus, South America, Africa and the Asia-Pacific Region. It provides practical, relevant information and guidance for the scaling-up of actions targeting CWR conservation around the world.