Breeding of Yujingyou 50,a New Late Hybrid Rice Combination with Good Quality

Yujingyou 50 is a new high-quality late indica hybrid rice combination selected by Institute of Grain and Oil Crops,Nanchang Academy of Agricultural Sciences and Hunan Zhonglang seed Industry Co.,Ltd.The combination matured 3 d earlier than Tianyouzhan.It has the characteristics of moderate plant type,broad and long flag leaves,general tillering ability,colorless palea tips,large panicles with many grains,high seed setting rate,average 1000-grain weight,good color change at maturity,and rice quality reaching grade 2 of ministry standard.It was approved by the Jiangxi Provincial Crop Variety Approval Committee on March 18,2021.This paper introduced the breeding process,characteristics,cultivation techniques and key points of seed production of this variety.