Segregation and selection of observed yardlong bean (Vigna sesquipedalis L. fruwirth) to get expected lines of purple pod

The previous practical breeding on yardlong bean was gotten potential lines in purple pod, namely UBPU1, UBPU2 and UBPU, respectively. This purple colour, indicated anthocyanine compound in fresh pod, and it was role-play as antioxidant in human life. These lines had potential properties to be developed as prospective and new varieties. The segregated or expected lines had 1200 ones and it had gotten from previous practical segregation. These lines had a high variability in purple colour and quantitative characters. Mass selection method had applied to evaluate pod colour, length, surface and taste. Purple colour of pod was identified by RHS colour chart. There was high variability on observed qualitative and quantitative characters. All of them described a genetic variability. Variability of pod purple colour distributed from Deep Purplish Red (colour code: 95B), Dark Purple (colour code: 79A), Dark Purple Green Strip (colour code: 79B), Strong Red (colour code: 46A), Deep Red (colour code: 53A), and Dark Red (colour code: 59A), respectively. Although pod and stem were purple, but had variability of purple colour. This breeding had gotten 90 expected lines of purple yardlong bean and was evaluated their yield potential. It was gotten 15 candidates of new varieties.