Breeding Report on the New Winter Wheat Variety with High Yield in Dryland,Longyu 12
The Gansu-Shaanxi-Ningxia border region frequently experiences cold and arid climates,yet it is exceptionally suitable for the cultivation of winter wheat.There is an urgent need to develop new wheat varieties that are high-yielding,resistant to multiple stresses,and widely adaptable.Longyu 12 is a new variety of drought-resistant,high-yielding,and stable winter wheat that was developed in 2009 through a crossbreeding program.Using Longyu 5,as the female parent and Tai 13907 as the male parent.The breeding was conducted using the pedigree method.From 2017 to 2019,it participated in the regional trials of winter wheat in the Longdong area of Gansu Province,with an average yield of 5 170.50 kg/ha across 14 sites in 2a,which was 12.20%higher than the control variety Longyu 4.In the 2019-2020 production trial in the Longdong area of Gansu Province,the average yield was 4 300.35 kg/ha,6.30%higher than the control variety Longyu 4.This new variety has a winter growth habit with a growth period of 274 days.It has an average height of 97.5 cm,with a nearly spindle-shaped form,long straight awns,white husk,red grains,and vitreous endosperm.It produces 5.28 million ears per hectare,with 35 grains per ear and a thousand-grain weight of 35.15 g.At the seedling stage,it shows immunity to a mix of fungi(0).While at the adult plant stage,it exhibits moderate susceptibility to the tested isolates and mixed fungi,but with lower severity and prevalence rates,indicating slow rusting characteristics.The grain contains 148.9 g/kg of crude protein(dry basis),347 g/kg of wet gluten(14%moisture basis),a water absorption rate of 587 mL/kg,a bulk density of 823 g/L,and a dough stability time of 2.0 minutes.It is suitable for planting in the hilly and arid areas of Qingyang,Pingliang in Gansu Province,and Guyuan in Ningxia,as well as similar ecological zones.
Winter wheatNew varietyLongyu 12Drought and cold resistanceSlow rusting
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