本文選題：特旱 + 玉米自交系�。� 參考：《干旱地區(qū)農(nóng)業(yè)研究》2016年04期

【摘要】：為了發(fā)掘和利用玉米抗旱種質(zhì)資源,選育耐旱高產(chǎn)的玉米雜交種,通過全生育期控水試驗,對58個玉米優(yōu)良自交系的抗旱性進(jìn)行了鑒定和評價,并進(jìn)行了抗旱性聚類和遺傳背景分析。結(jié)果表明:在特旱條件下,58個自交系減產(chǎn)幅度為40.6%~100%,平均產(chǎn)量下降了81.6%;結(jié)實率、穗行數(shù)、行粒數(shù)、出籽率4個性狀分別與抗旱系數(shù)或抗旱指數(shù)存在顯著或極顯著的相關(guān)性,可作為玉米自交系抗旱性評價的關(guān)鍵指標(biāo);根據(jù)抗旱性的不同,58個自交系可劃分為3類,其中第I類自交系K12、PB1139、RD6的抗旱性極強(qiáng),第II類自交系CL11、鄭58、P138、特早熟、Ft45-5具有較強(qiáng)的抗旱潛力。為了便于利用雜種優(yōu)勢,將不同抗旱性的自交系按照其所屬遺傳類群進(jìn)行了再次劃分,58個自交系可劃分為2個類群,其中A群中抗旱性強(qiáng)的自交系有CL11和鄭58,B群中抗旱性強(qiáng)的自交系有K12、PB1139、RD6、Ft45-5、P138和特早熟。
[Abstract]:In order to explore and utilize the drought resistant germplasm resources of maize and to select maize hybrids with drought tolerance and high yield, the drought resistance of 58 excellent inbred lines of maize was identified and evaluated by water control experiment during the whole growth period. The cluster and genetic background of drought resistance were analyzed. The results showed that under the condition of special drought, the yield of 58 inbred lines decreased by 40.6100 and the average yield decreased by 81.6.The seed setting rate, the number of rows per ear, the number of grains per row, and the seed yield were significantly or extremely significantly correlated with the drought resistance coefficient or drought resistance index, respectively. According to the drought resistance, 58 inbred lines can be divided into 3 types, among them, the type I inbred line K12B1139 RD6 has a strong drought resistance. Class II inbred lines CL11, Zheng 58P138, especially early maturing Ft45-5 have strong drought resistance potential. In order to make use of heterosis, the inbred lines with different drought resistance were subdivided according to their genetic groups, and 58 inbred lines could be divided into 2 groups. Among them, the inbred lines with strong drought resistance in group A are CL11 and inbred lines with strong drought resistance in group Zheng 58B are K12P1139 RD6Ft45-5P138 and especially early maturing.
【作者單位】： 寶雞市農(nóng)業(yè)科學(xué)研究所;西北農(nóng)林科技大學(xué)旱區(qū)作物逆境生物學(xué)國家重點實驗室;
【基金】：旱區(qū)作物逆境生物學(xué)國家重點實驗室開放課題基金(CSBAA201214) 陜西省科技廳農(nóng)業(yè)科技創(chuàng)新與攻關(guān)項目(2016NY-004)
【分類號】：S513;S423

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