2.1. Plant materials
A
total of 112 accessions were planted in yam germplasm resource garden of
Jiangxi Agricultural University (Nanchang City, Jiangxi Province,
Supplementary Table 1). Landrace
varieties were collected from farmers’ fields, institutions, and markets
in China, and wild resources were acquired from mountainous regions.
Experimental planting was arranged in
ridges on April 10, 2019, with 20 cm distance for each individual plant
and 1.2 m distance between ridges. Tuber segments (80–120 g) were used
as seeds. Individual plants were supported by bamboo stakes. Standard
weeding and agronomic measures were applied regularly to provide
adequate plant growth conditions.