品種名稱：美豫268

     申 請 者：河南省豫玉(yu)種業股份(fen)有(you)限(xian)公司

     育 種 者：河南省(sheng)豫玉種(zhong)業股份有限公(gong)司

     品種來源：X7348×F727

     特征特性：東華北中晚熟春玉米組出苗至成熟126.8天，比對(dui)照鄭單(dan)958早熟(shu)2.3天。幼苗(miao)葉(xie)鞘(qiao)紫色，葉(xie)片(pian)綠色，葉(xie)緣紫色，花藥淺紫色，穎殼綠色。株(zhu)型半緊湊(cou)，株(zhu)高281厘米(mi)(mi)，穗位高107厘米(mi)(mi)，成株(zhu)葉(xie)片(pian)數(shu)20片(pian)。果穗筒型，穗長19.4厘米(mi)(mi)，穗行數(shu)16~18行，穗軸紅，籽(zi)粒黃(huang)色、馬齒(chi)，百粒重(zhong)36.3克。接種鑒定，中(zhong)抗大斑(ban)病(bing)、莖(jing)腐病(bing)、穗腐病(bing)，感(gan)絲黑穗病(bing)、灰(hui)斑(ban)病(bing)。品質分析，籽(zi)粒容(rong)重(zhong)762克/升，粗蛋白(bai)含量11.85%，粗脂(zhi)肪含量3.08%，粗淀(dian)粉含量72.02%，賴氨酸含量0.31%。

     產量表現：2017-2018年參加東華北中晚熟春玉米組綠色通道區域試驗，兩年平均畝產794.55千(qian)克(ke)，比對照鄭單958增(zeng)產(chan)7.05%。2018年生產(chan)試驗(yan)，平均(jun)畝產(chan)753.2千(qian)克(ke)，比對照鄭單958增(zeng)產(chan)5.2%。

     栽培技術要點：中等肥力以上地塊栽培，4月下(xia)旬至5月上旬播種，每畝適宜種植密度(du)3500~4000株。

     審定意見：該品(pin)種(zhong)符合國家玉米品(pin)種(zhong)審(shen)定(ding)標準(zhun)，通過審(shen)定(ding)。適宜在(zai)東(dong)(dong)華(hua)北中晚(wan)熟(shu)春(chun)玉米區(qu)(qu)的吉林省(sheng)四平(ping)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、松原(yuan)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、長春(chun)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)的大部(bu)分(fen)地區(qu)(qu)，遼源(yuan)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、白城市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、吉林市(shi)(shi)(shi)(shi)(shi)(shi)(shi)部(bu)分(fen)地區(qu)(qu)、通化(hua)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)南部(bu)，遼寧省(sheng)除(chu)東(dong)(dong)部(bu)山(shan)區(qu)(qu)和(he)大連(lian)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、東(dong)(dong)港市(shi)(shi)(shi)(shi)(shi)(shi)(shi)以(yi)外的大部(bu)分(fen)地區(qu)(qu)，內蒙古赤峰市(shi)(shi)(shi)(shi)(shi)(shi)(shi)和(he)通遼市(shi)(shi)(shi)(shi)(shi)(shi)(shi)大部(bu)分(fen)地區(qu)(qu)，山(shan)西省(sheng)忻州市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、晉(jin)中市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、太原(yuan)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、陽泉市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、長治市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、晉(jin)城市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、呂梁市(shi)(shi)(shi)(shi)(shi)(shi)(shi)平(ping)川區(qu)(qu)和(he)南部(bu)山(shan)區(qu)(qu)，河北省(sheng)張(zhang)家口市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、承德市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、秦皇島市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、唐山(shan)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、廊坊(fang)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、保定(ding)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)北部(bu)、滄(cang)州市(shi)(shi)(shi)(shi)(shi)(shi)(shi)北部(bu)春(chun)播(bo)區(qu)(qu)，北京(jing)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)春(chun)播(bo)區(qu)(qu)，天津市(shi)(shi)(shi)(shi)(shi)(shi)(shi)春(chun)播(bo)區(qu)(qu)種(zhong)植。