玉米杂交种龙源201选育报告

玉米新杂交种龙源201是天水市种子管理站以外引系K12优选系K12-16为母本、自育系源自168为父本杂交选育而成.生育期131 d,活秆成熟,粮饲兼用.株高260 cm,千粒重408 g,2006年测定,籽粒含粗蛋白94.16 g/kg、粗脂肪36.2 g/kg、粗淀粉752.7 g/kg、赖氨酸3.30 g/kg、粗灰分13.4 g/kg.高抗瘤黑粉病,抗丝黑穗病、矮花叶病,中抗小斑病、大斑病、茎腐病,感红叶病.在2005-2006年甘肃省晚熟B组玉米区域试验中,平均折合产量13 538.25 kg/hm2,较对照品种豫玉22号增产3.45%.适宜天水市及周边海拔1 800 m以下地区推广种植.

Breeding Report of A Maize Hybrid Longyuan 201

Longyuan 201 was a new maize hybrid bred by crossing with the foreign inbred line K12-16 as female parent and self-selection inbred line 168 as male parent by Tianshui Seed Management Center.The results indicated that the grow period was 131 day,its stems stayed green while seed matured and grain and feed purpose.The plant height was 260 cm,1 000-kernel weight was 408 g.The result also indicated that seed crude protein,crude fat, crude starch,lysine and coarse ash were 94.16,36.2,752.7,3.30 and 13.4 g/kg,respectively in 2006.It was highly resistance to corn boil smut,resistance to maize head smut and dwarf mosaic disease,anti-resistance to spot disease and stalk rot,and infection of red-leaf disease.The average yield of Longyuan 201 was 13 538.25 kg/hm2 and 3.45% higher than of the check Yuyu 22 in maize regional test of Gansu Province during the period 2005-2006.It is suitable to plant in the altitude down 1 800 m in the surrounding areas and Tianshui city.