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Nh1-NSN wQ .l }ut)R(uHes0US*h8T.lϑ00W Nr^͑Tׂؚ(WTyX[(Wg>fW]_ }||r^͑(WTyX[(W>fW]_ N TO.l4ls^[T'`r gg>fWvq_T SY.l }ut)R(uHes0US*h8T.lϑT0W Nr^͑(WTyNO.l4ls^vN\O0Rg>fW4ls^ Rpe(WTyNO.l4ls^vN\O0R>fW4ls^ fُQ*N'`r(W'YTyv]_VO.l4ls^v N T N T0 2.2$NyO.l4ls^ N'YvsQ'`rSvQv[fW0 1) The abbr. of traits are the same as in Table 1. 2) Different letters within a column mean significant differences at 0.05 level Nh2-NSN wQ (Wck8^O.lagN N dN.l })R(usT}||NϑY vQ[T'`rX[(W>fWvWVW]_ FO1\g*N'`r _N N/f@b gvTyX[(W>fW]_v SYh-NpencSN wQBI-45(Wׂguk}Y BI-04k] FO/f}||Nϑ'`rhfck8^O.lagN NQ*NTy]_ N'Y0T'`rvWVW]_US*h8T.lϑ0W Nr^͑Rpeׂؚ}||Nϑ.l }ut)R(uHes f(Wck8^O.lagN N US*h8T.lϑT0W Nr^͑WVWS_k'Y .l }ut)R(uHesT}||NϑvWVWS_k\0 h3. NO.l N'YvsQ'`rvWVW]_ Table3. 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fW0 1) The abbr. of traits are the same as in Table 1. *Mean significant differences at 0.05 levels. h5. NO.l N'YT'`rvvsQ'`Rg Table 5. Correlation analysis among relative traits under low-N stress in barley '`rTrait1)NUENUSDWPHTNNU-0.378SDW0.2190.820PH-0.7060.9230.536TN0.993-0.2680.331-0.619GY0.992-0.2560.344-0.6081.000(**)1) '`re)Q Th10  ** Nh(W0.014ls^>fW0 1) The abbr. of traits are the same as in Table 1. **Mean significant differences at 0.01 levels. h6. 'YTvsQ'`rv[fW0 1) The abbr. of traits are the same as in Fig 1. *0**Mean significant differences at 0.05 and 0.01 levels, respectively. h4hf(Wck8^O.lagN NN0W Nr^͑TUS*h8T.lϑb>fWckvsQsQ| fׂgUS*h8T.lϑ[0W Nr^͑w@w͑v\O(u0h5hf(WNO.l NRpeT}||Nϑbg>fWckvsQsQ| ُ7hSNbNO.lagN NvRpechN}||Nϑ^zN[vT|0h6vvsQ'`Rghfv[.l }ut)R(uHes0v[}||NϑTv[ׂؚNHTg>fWb>fWckvsQ ُfׂgv[.l }ut)R(uHesTv[ׂؚNv[}||Nϑ_NSN^zT| SY؏SsUS*h8T.lϑTv[0W Nr^͑b>fWckvsQ FO/fl gSsv[US*h8T.lϑ0v[0W Nr^͑Tv[}||NϑHT>fWckvsQsQ| ُfv[0W Nr^͑vؚNOSv^ NNhv[}||NϑvؚNO0 3 NvMRvxvzKbkeg w NO.lv[{ N,Ǒ(uׂgThQugv~Tvel ǏnmW{QՋ0v=hՋT0uՋg N Tch N ċNTyvNO.l'`[6-16]00uՋ~gkSO FO__S0RzzTevP6R nmW{QՋTv=hՋ1\SN1\gNb_`f[Tutch['YybϑvWVW(WegۏL_[{ v^NW{QagNSNQnxe0WۏL͑ Y FOvQSO'` g_FUi0,geǑ(unmW{QՋ~T0uՋvelxvzN'YNO.l'` ekNׂg'YTWVW(Wck8^O.lTNO.lv]_ SkNbqg'YTWVW(WeT Nev]_ Te|Q~NnmW{Qv{US0͑ Y'`}YI{yrpT0uՋvw['` :Nyf[ċN'YNO.l'`cON}YvO0 NNO.lċNcheg w N Txvz[%{QHesv[IN} Nv T FO'YϑDehfY\Oirv.l })R(usX[(W>fWvWVW]_ N:N.l })R(uHes[\Oir}||Nϑw@w͑v\O(u04glI{[7] :N(W4l;z.lؚHe0NO.lTyv e (WNO.l4ls^ N[ut.l })R(uHesۏLvc bk gHe0 z^\I{[8][88 N;zyDnۏLNׂg.l })R(uHesvWVW]_k Ss N T;zyDnׂgv.l })R(uHesX[(W>fWvWVW]_,NS.l }4ls^vq_T NO.l0-N.lTؚ.lv.l })R(usX[(Wg>fW]_ v^.l }4ls^vGSؚ HT NMR0,gxvzSs(Wck8^O.lagN 'Yׂg.l }ut)R(uHesvWVW]_ N'Y (WNO.l N X[(Wf>fvWVW]_ hfNO.lagN N.l })R(usvWVW]_nx[k'Y0 SY zIlNSI{[9](W[4l;zׂg.l }%{QؚHeWVWv[{ -N:N[4l;zۏL.lؚHe[{ eUS*hRpe\O:N[{ ch/f gHev Teׂؚ_NSN\O:N[{ NO.ly(vR[{ ch01uN'Y/fN6e}||Nϑ:Nvh, @bN'Y.lؚHeWVW^/fN(WNO.lagN N}||Nϑv[ؚvWVW[17] SineboI{[16] (W['Y.l })R(uHesvWVWS_xvz-N:Nbqg.l })R(uHesT}||NϑbckvsQsQ|0,gxvzSs (WNO.l NRpeN}||NϑHTg>fWckvsQsQ| v[.l })R(us0v[ׂؚN}||NϑR+RHTg>fWckvsQsQ| Q0Rv[ׂؚS_|peyr+R\ VdkbN:NNNO.l NRpeTׂgv[.l })R(us\O:N'YׂgNO.l[{ v͑ch ׂgv[ׂؚ\O:NR[{ ch0 (WNO.l[{ y( N ,gxvzǏvsQchvt[Ss'YTyBI-04kNO.l BI-45R[.l }v[kOea0 "a" NwmQybu`@bUONR^TWSNQN'Yf[ HYPERLINK "http://nx.njau.edu.cn:8010/News_View.asp?NewsID=1445" \o "^8l " \t "_blank" ^8l ^(W[-N~Nv.^R0 Se.s [1] _s~ ]Qhss [^f I{ N TWVW'YTy'YlSvQkZ+TϑvS_ĉ_[J]{|\Oirf[b 2007 274 721-724 [2] fm` h#e.l s^a=hWSO|-N iir_v'YϑCQ }[J]WXe 2002 (4)1-3. [3] hgR f[c NgN I{dU}||ؚˆ}v(+Tϑ[T(vq_TSvQ[V{[J] HYPERLINK "http://DMKX.chinajournal.net.cn" \t "_blank" 'Yyf[ 2005,03 4014024 [4] {feNW. dUR]NKbQOHr [M]-NV{]NQHr>y 2007 [5] Moll R H, Kamprath E J, Jackson W A.. Analysis and interpretation of factors which contribute to efficiency of nitrogen utilization [J]. Crop Sci., 1982, 74, 562 564. [6] 4gl 闙 i ؚq[4l;z N TWVW.l })R(uHes]_[J]-NV4l;zyf[ 2003 l73 233-23 [7] 4gl 闙 i ؚq[ I{4l;z.l })R(uHesv bHeg[J]\Oirf[b 2004 307 651-656 [8] z^\ 4b^l fkSf I{;zyDnׂg.l }%{Qyr'`vWVW]_[J]-NV4l;zyf[ 2005 196 533-538 [9] zIlNS YOeeh hMckS I{4l;zׂg.l }%{QؚHeWVWv[{ [J] HYPERLINK "http://dlib.cnki.net/KNS50/Navi/Bridge.aspx?LinkType=BaseLink&DBCode=cjfd&TableName=cjfdbaseinfo&Field=BaseID&Value=ZJNX&NaviLink=%e6%b5%99%e6%b1%9f%e5%86%9c%e4%b8%9a%e7%a7%91%e5%ad%a6" \t "_blank" Ym_lQNyf[ 2007 5537-541 [10] Y[ O 4b^l FGY I{\Ty.l)R(uHesvċNchSvQ.l%{Qyr'`xvz[J]^(uu`f[b 2004 156 983-987 [11]  sY1r ZQ^S I{NO.l\WVW[{ chvxvz[J] iir%{QNef[b 2007 131 93-98 [12] H s|VNS _y I{NSS:SR;N=hss|BgNyv.lHesRg[J]ss|yf[ 2003 112 78-82 [13] %fN H Ng^u I{ss|ꁤN|[NO.lS^v0uNv=hċN[J]ss|yf[ 2005 13(1)28-32 [14] Grny A G.. Inheritance of nitrogen and phosphorus utilization efficiency in spring barley at the vegetative growth stages under high and low nutrition [J]. Plant Breeding, 1999, 118: 511-516. [15] Grny A G. Variation in utilization efficiency and tolerance to reduced water and nitrogen supply among wild and cultivated barleys [J]. Euphytica, 2001, 117: 59-66. [16] Sinebo W, Gretzmacher R, Edelbauer A. Genotypic variation for nitrogen use efficiency in Ethiopian barley [J]. Field Crops Res., 2004 85: 43 60. [17] Graham R D. Breeding for nutritional characteristics in cereals. // Tinker P B , Lauchli A. Advances in plant nutrition[M]. New York : Praeger , 1984: 57-102. 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