极早熟豇豆新品种天畅五号的选育

天畅5号是农家品种杨家豇豆与之豇28—2杂交，并通过系统选育而成的极早熟豇豆新品种。该品种表现早熟，叶片小。以主蔓结荚为主，有侧蔓1-2个，始花节位2-3节。成荚率高。每花穗结荚2~4条，前期产量较高。嫩荚白绿色，荚条长而直，荚长65cm，单荚质量22g。荚条肉质脆嫩，品质优，商品性极佳。春播从播种到商品荚采摘期为52天。露地种植的产量1800-2500kg/667m2，适于长江流域栽培。

Development of A New Asparagus Bean Cultivar,Tianchang No.5

Tianchang No.5 is a newly bred asparagus bean variety developed by system selection after crossing Yang cowpea which was collected from farmer with Zhijiang 28-2. This cultivar is early-maturing, the leaves are small. Usually it gets its legumen on the main vine and has 1-2 side vine. The first anthotaxy is located on the 2-3 burl. It has the high rate of legumen, and every anthotaxy has 2-4 legumen. The yield is high at the first period. The tender legumen is whitegreen, the legumen is long and straight, with 65 cm in length, and 22 g in weight. The tender legumen has high quality and high commodity. The time from the germination to commodity is 52 d in spring. The yield is about 27-37.5 t/hm2 in the open field. It is suitable to be cultivated in region of the Yangtze River.