209 © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2021 S. H. Wani et al. (eds.), Physiological, Molecular, and Genetic Perspectives of Wheat Improvement, https://doi.org/10.1007/978-3-030-59577-7_10 Genetic Dissection for Yield and Yield-Related Traits in Bread Wheat (Triticum aestivum L.) Reyazul Rouf Mir, Sachin Kumar, and Safoora Shaf Abstract Wheat is one of the most important cereal crops of global importance. Wheat crop provides one-ffth of the daily calories and dietary proteins for human consumption. Improving grain yield (GY) and yield-contributing traits is consid- ered important for increasing wheat production and therefore for food security. The yield and traits related to yield in wheat are mostly quantitative traits controlled by several small effect/minor genes/QTLs. Hundreds of studies have been conducted in wheat for the discovery of genes/QTLs for yield and related traits using different approaches. Among different approaches, linkage-based QTL mapping and associa- tion mapping are most commonly used approaches. Traditional QTL mapping involves the use of biparental mapping populations derived from crossing two con- trasting parental genotypes. The other recently emerged mapping approach “asso- ciation mapping” also known as genome-wide association studies (GWAS) that involves the use of diverse germplasm is considered the method of choice nowadays to unravel and understand genetics of yield and yield-related traits. Using these dif- ferent mapping approaches, several genes/QTLs have been already identifed for GY and yield-related traits in wheat. The QTLs/genes identifed belong to all the 21 bread wheat chromosomes. In addition, QTL × Environment, QTL × QTL, and QTL × QTL × Environment interactions have been also worked out in detail. The important stable and major QTLs identifed will prove useful in wheat molecular breeding programs aimed at enhancing GY for food security. Keywords Wheat · Yield · Yield contributing traits · QTLs · Genes · Epistatic interactions R. R. Mir (*) · S. Shaf Division of Genetics and Plant Breeding, Faculty of Agriculture, SKUAST-Kashmir, Wadura Sopore, India e-mail: rrmir@skuastkashmir.ac.in S. Kumar Department of Genetics and Plant Breeding, Chaudhary Charan Singh University, Meerut, Uttar Pradesh, India