Vetch(Vicia sativa)is an important forage legume in the alpine grassland region of China, and is used for supplementary livestock feeding during winter and spring. However, studies show that seed yield is very low due to harsh environmental conditions. Generally, the seed for sowing is imported from other regions and is often too expensive for farmers. Therefore, producing higher yielding and quality vetch seeds is a key objective for vetch breeders in the region. To date, several new vetch lines with highe...