Maize Genomics and Genetics 2025, Vol.16, No.3, 149-166 http://cropscipublisher.com/index.php/mgg 158 5.2 Breeding and field performance of demonstration varieties After introduction test comparison, four new fresh corn varieties with outstanding performance, 'Jinyin 208', 'Zhetian 19', 'Caitiannuo 168' and 'Meiyu 25', were selected from 9 candidate varieties as demonstration and promotion varieties. These four varieties have different sources and types, including sweet corn varieties ('Jinyin 208', 'Zhetian 19'), glutinous corn varieties ('Caitiannuo 168') and sweet and glutinous varieties ('Meiyu 25'). Their growth period covers early, medium and late maturity types (the full growth period of spring sowing is about 98 to 113 days), which can meet the planting needs of different seasons and market listing periods. 'Jinyin 208' was introduced by Hangzhou Seed Industry Group Co., Ltd. (Zhejiang Introduction 2017 No. 001) and is a sweet corn variety. This variety has the shortest growth period, with about 98 days from sowing to harvesting in spring, and can be put on the market early to seize the high price period of fresh corn. Its fresh ear yield is average among the experimental varieties, with an output of about 500 kg per mu. Although the yield is not dominant, the ear quality of 'Jinyin 208' is outstanding, the grain tastes sweet, the skin is thin and the residue is less, the appearance is good, and the comprehensive score in the sensory evaluation is the highest (85 points). During the field growth process, the plant is relatively short and strong (plant height is about 1 m), with strong lodging resistance and relatively strong resistance to pests and diseases such as corn borers (Figure 3). 'Jinyin 208' is an early-maturing high-quality fresh corn variety, suitable for early spring sowing and planting that requires attention to taste quality. Figure 3 The plant of 'Jinyin 208' 'Zhetian 19' was bred by Dongyang Corn Research Institute of Zhejiang Province (Zheshenyu 2020002) and is a sweet corn variety. This variety has a relatively long growth period, with a full growth period of about 113 days in spring sowing, and matures the latest among the experimental varieties. The fresh ear yield of 'Zhetian 19' is relatively high, with an acreage yield of 1 068 kg, ranking among the top among all the tested varieties. Its ear quality is also good, with high sweetness, tender grains, thin seed coat, and good flavor and palatability evaluation (sensory score 78 points) (Figure 4). Field planting observations show that 'Zhetian 19' plants are tall and strong (plant height is close to 2 m), the ear position is relatively reasonable, there is no empty stalk or lodging phenomenon, and it shows good high yield and stable yield characteristics. 'Zhetian 19' is a new medium-late maturing and high-yield sweet corn variety with both yield and quality advantages, suitable for large-scale promotion and planting in coastal areas.
RkJQdWJsaXNoZXIy MjQ4ODYzNA==