Unveiling the heterosis pattern of modern maize breeding in Southwest China through population structure and genetic diversity analysis.

ABSTRACT: Maize (Zea mays L.) is an important food crop throughout the world and is also one of the earliest crops to use heterosis. In this study, we evaluated the genetic diversity, population structure, and selective sweep of 100 elite inbred maize lines collected from the current breeding program in Sichuan province, Southwest China, using 5,261,175 high-quality single nucleotide polymorphisms (SNPs). We discovered an abundance of genetic diversities and classified them into four groups. By combining kinship relationships, these groups were further divided into Tropic-local A, Improved-tropic, Tropic-local B, and Improved-local. Genomic differentiation was assessed using F_st values (0.21-0.44) as well as genetic diversity (π = 6.07 × 10^-4 - 6.61 × 10^-4). We gener

SUBMITTER: Ma P 

PROVIDER: S-EPMC11998202 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature