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2024 Speakers

Sangeeta Singh

Sangeeta Singh, Speaker at Plant Biotechnology Conferences
International Centre for Genetic Engineering and Biotechnology, India
Title : Genomic advancements: Unveiling a 62K genic-SNP chip array for precision genetic studies and breeding applications in pigeonpea (Cajanus cajan L. millsp.)


Pigeonpea stands as the second most vital leguminous crop in South Asia, playing a crucial role in ensuring food and nutritional security. To expedite breeding efforts, we have harnessed advanced genomic tools, specifically a high-throughput 62 K SNP chip array named 'CcSNPnks' designed for the Affymetrix GeneTitan® platform. This array is a product of meticulous filtration of 645,662 genic-SNPs identified through the re-sequencing of 45 diverse genotypes.

Comprising 62,053 SNPs from 9629 genes across five distinct categories, 'CcSNPnks' includes single-copy genes unique to pigeonpea, those conserved between soybean and pigeonpea, homologs of crucial agronomic genes, disease resistance and defense response genes, and multi-copy genes of pigeonpea. This comprehensive genic chip boasts a distribution of 28.94% exonic, 33.04% intronic, 27.56% 5′UTR, and 10.46% 3′UTR SNPs, featuring multiple SNPs per gene for effective gene haplotype network analysis.

The utility of 'CcSNPnks' extends to various applications, as evidenced by its successful deployment in analyzing the genetic diversity and population structure of 95 pigeonpea varieties. Furthermore, it facilitated high-resolution mapping of 11 QTLs related to yield traits in a biparental RIL population, specifically targeting the number of branches, pod-bearing length, and number of seeds per pod.

Functioning as a precise and high-density genotyping tool, the 'CcSNPnks' chip array emerges as a valuable resource for activities such as high-resolution fingerprinting, QTL mapping, and conducting genome-wide, as well as gene-based association studies in the context of pigeonpea research.


Dr. Sangeeta Singh currently holds the position of Principal Project Scientist at the International Centre for Genetic Engineering and Biotechnology, New Delhi, India. Previously, she served as a Senior Scientist at NGGF, National Institute of Plant Genome Research, New Delhi. Dr. Singh earned her PhD in Plant Biotechnology from DAVV, Indore, India, and pursued postdoctoral studies at ICAR-NIPB, New Delhi, India. She has expertise on plant genomics, molecular breeding, and bioinformatics. With a wealth of expertise in her field, Dr. Singh has made significant contributions, including the development of two impactful products: a 62K SNP array tailored for pigeonpea and an 80K SNP array designed for mango. Additionally, she has created two databases—an extensive GM crop database and an SSR database dedicated to millets. Dr. Singh's research endeavors are well-documented, with over 35 publications in esteemed international journals. Beyond her research, she actively participates in the scientific community, serving as an editorial board member and reviewer for reputable journals. Recognizing her scientific excellence, Dr. Singh has received numerous prestigious awards and honors, surpassing twelve in total. Notable accolades include the Junior Scientist of the Year Award in 2017 from the National Environmental Science Academy and the Fellow Award in 2023 from the Society of Plant Research in India.

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