Mating Environmental Designs R package MEDesigns version 1.0.1 In breeding experiments, mating environmental (ME) designs are very popular as mating designs are directly implemented in the field environment using block or row-column designs. Here, three functions are given related to three new methods which will generate mating diallel cross designs (Hinkelmann and Kempthorne, 1963<doi:10.2307/2333899>) or mating environmental (ME) designs along with design parameters, C matrix, eigenvalues (EVs), degree of fractionations (DF) and canonical efficiency factor (CEF). Another one function is added to check the properties of a given ME diallel cross design. Software Depends: R (>= 3.5) Suggests: MASS Ashutosh Dalal <ashutosh.dalal97@gmail.com> Comprehensive R Archive Network (CRAN) Ashutosh Dalal [aut, cre], Cini Varghese [aut, ctb], Rajender Parsad [aut, ctb], Mohd Harun [aut, ctb] GPL (>= 2) 2025-04-24 application/tgz https://CRAN.R-project.org/package=MEDesigns doi:10.32614/CRAN.package.MEDesigns