关键词: 豇豆, 选育, 品种

Abstract: ‘Chengjiang 6’is an early-maturing new cowpea cultivar developed through systematic breeding,using the elite line 170 as the female parent and the extremely early-maturing and disease-resistant line p-3 as the male parent. It begins flowering at the 1st to 3rd node,and the period from sowing to the first harvest is approximately 50 days. The plant is vining,with vines growing 3.5 m to 4.0 m in length,and pod-setting mainly occurs on the main vine. The tender pods are dark green,long and cylindrical with a central suture,averaging 68.3 cm in length and 26.8 g in weight per pod. Seeds are kidney-shaped with a light reddish-brown seed coat,and the 100-seed weight is about 21.5 g. This cultivar shows resistance to root rot and viral diseases,with field resistance to viruses stronger. It yields approximately 31 500 kg· hm^-2,with over 65% of the total yield produced in the early stage. It is suitable for early-maturing cultivation in cowpea-growing regions of Sichuan.

Key words: asparagus bean, breeding, cultivar