‘Mianzijiang No.1’ is a new purple cowpea variety developed by crossing breeding material
‘403-2’ as female parent and‘ 2441’ as male parent through system selective breeding．It is of medium
maturity. Its growth period is about 71 days．The first inflorescence occurs at the 5-6th node．Its flower is light
purple in color，and seed is reddish-brown and of kidney shape．The cowpea pod is 45-55 cm in length．The
single pod weight is about 15 g．The pod has even thickness，less fibre and tail．Its comprehensive characteristics
are superior．The anthocyanins content is 0.97 mg·g^-1．The yield in spring cultivation is 27.0-31.5 t·hm^-2．It
is suitable for planting in cowpea production areas of Sichuan Province．