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Study on Morphological Formation Mechanism of Grazing Tolerance of Medicago falcata

黄花苜蓿个体水平耐牧性的形态学成因机制研究



全 文 :!24" !1#
 Vol.24  No.1
! " # $
ACTA AGRESTIA SINICA
   2016$  1%
  Jan.  2016
犱狅犻:10.11733/j.issn.10070435.2016.01.005
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:S541.9    ABCDE:A     AFG@:10070435(2016)01003507
犛狋狌犱狔狅狀犕狅狉狆犺狅犾狅犵犻犮犪犾犉狅狉犿犪狋犻狅狀犕犲犮犺犪狀犻狊犿狅犳犌狉犪狕犻狀犵
犜狅犾犲狉犪狀犮犲狅犳犕犲犱犻犮犪犵狅犳犪犾犮犪狋犪
WANGJunjie1,LVShijie2,WANGMingtao1,WANGDan1,
Badalahu3,JIANGLihong3,Chaoketu4
(1.ColegeofEcologyandEnvironmentalScience,InnerMongoliaAgriculturalUniversity,Huhhot,InnerMongolia010019,China;
2.ColegeofScience,InnerMongoliaAgriculturalUniversity,Huhhot,InnerMongolia010018,China;
3.Grasslandworkstation,EwenkeBanner,Bayantuohai,InnerMongolia021000,China;
4.HulunbeierInstituteofgrassland,Hailaer,InnerMongolia021008,China)
犃犫狊狋狉犪犮狋:Inordertorevealthemorphologicalformationmechanismofgrazingtoleranceofsicklealfalfa
(犕犲犱犻犮犪犵狅犳犪犾犮犪狋犪L.)andtoexplorethenewwayofgrazingtolerantalfalfabreeding,Twosicklealfalfa
groups(strongandweakgrazingtolerance)wereusedtoobserveanumberofmorphologicaltraitsbefore
andaftergrazing.Theresultsindicatedthatthecorrelationdegreeorderofthesetraitswithgrazingtoler
ancewasrootcolarwidth>crowndepth>stemnumber>stemlength.Thedeterminingdegreefor
grazingtolerancewascrowndepth>rootcolarwidth>stemnumber>stemlength>aboveground
rootcolarwidth>standprojectivecoverage.Thecrowndepthof犕犲犱犻犮犪犵狅犳犪犾犮犪狋犪showedoutapromo
tingeffectindependentlyonincreasingthegrazingtolerance,andothertraitspromotedthegrazingtoler
ancebytheirinteractions.Thesicklealfalfaplantswithbroadanddeepsetcrowns,prolificbranchesand
largestandshowedhightolerancetograzing,andthesetraitscanbeusedasmorphologicalindicatorsfor
grazingtolerantbreedingprograminearlybreeding.
犓犲狔狑狅狉犱狊:Continuousgrazing;犕犲犱犻犮犪犵狅犳犪犾犮犪狋犪;Grazingtolerance;Morphology;Formationmecha
nism
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:20140915;LMJK:20151012
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Table1 Phenotypiccharactersof犕犲犱犻犮犪犵狅犳犪犾犮犪狋犪
withdifferentgrazingtolerancesaftergrazing
gF‰
Phenotypiccharacters
Ž?–
Grazingtolerance
Ž?o
Grazingintolerance
JròUÄA
Projectivecoverdegree/cm2
3847.62±588.05a 1611.44±361.50b
rpÂ
Diameteroftheplant/cm
12.40±2.12a 8.59±1.13b
rs
Stemlength/cm
60.95±9.73a 45.50±5.42b

Stemnumber/M
64.61±13.21a 21.00±6.57b
}ñƒÙ‚A
Crowndepth/cm
4.44±0.87a 2.79±0.56b
}ñÞA
Rootcolarwidth/cm
2.91±0.35a 2.09±0.21b
  ü:@‘6@uU;Çg˜Øº…†(犘<0.05),œ@
Note:Differentlowercasesinthesamelineindicatesignificant
differenceatthe0.05level,thesameasbelow
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JrL儕A>?_TŽ?Øº

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Table2 Phenotypiccharactersoftheplantsofdifferent
grazingtolerancebeforegrazing
gF‰
Phenotypiccharacters
Ž?–
Grazingtolerance
Ž?o
Grazingintolerance
JròUÄA
Projectivecoverdegree/cm2
529.17±105.41a 487.71±98.36a
rpÂ
Diameteroftheplant/cm
10.73±1.37a 8.29±0.86b
rs
Stemlength/cm
10.90±2.55a 7.36±1.04b

Stemnumber/M
22.14±3.94a 12.43±4.98b
}ñƒÙ‚A
Crowndepth/cm
6.19±0.66a 4.45±0.03b
}ñÞA
Rootcolarwidth/cm
2.34±0.36a 2.05±0.41a
2.2 c~äðñò`‹ÏÓWõ&Ï#€2$
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º…†T»F

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D©»F

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UÄA

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Table3 Pathanalysisofphenotypiccharactersdataoftheplantsaftergrazing
gF‰
Phenotypic
characters
JròUÄA
Projective
coverdegree
rpÂ
Diameterof
theplant
rs
Stem
length

Stemnumber
}ñƒÙ‚A
Crowndepth
}ñÞA
Root
colarwidth
ˆQA
Similarity
JròUÄA
Projective
coverdegree
0.0877 -0.0620 -0.0628 0.1275 0.0438 0.1504 0.2846
rpÂ
Diameterof
theplant
0.0438 -0.1241 -0.0162 0.0465 0.1200 0.2506 0.3206
rs
Stemlength
0.0462 -0.0169 -0.1194 0.3025 0.1656 0.1256 0.5036

Stemnumber
0.0253 -0.0130 -0.0817 0.4421 0.2122 -0.0059 0.5790
}ñƒÙ‚A
Crowndepth
0.0092 -0.0356 -0.0473 0.2242 0.4183 0.2233 0.7922
}ñÞA
Rootcolar
width
0.0235 -0.0555 -0.0267 -0.0046 0.1666 0.5607 0.6640
  Ӛg3&TefLjTO,}ñÞA、}ñƒ
قA

~ë6JròUÄADŽ?T"#cd
©n[\cd

ò}ñÞA

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nrpÂ6rsnoT)c
d

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‘cNcdYuÿ“n}ñƒÙ‚A>}ñ
ÞA>~ë>rs>rpÂ>JròUÄA。
2.3 õ&Ï9ö(¹C29Ï>r
Aˆ‰=•ÚLKõ‘X<`UVTv›œW
Xñ<`%"#‰]TßG=•Òâ

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f…˜

JròUÄArpÂ

rsT‰]Ýn†
‡

n®úrp}ñÞA‰]Ýn†‡

rs
~ëT‰]t†‡

n~ë}ñÞAt†‡

Ü
ñ\»FŽ?ˆQAT…†%ˆ‰‰]ÿ“n
}ñÞA>}ñƒÙ‚A>~ë>rs(g4)。
ˆQAogwxìíŽ?T–o

ñ\»
FˆQA%ˆ‰]ëTYuuv‘Ž?
–oT‰]

è.LjTd

LDÃTñ\+»
F&

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(犘<0.05),n}ñÞArpÂ6~ë‰]Ý
n†‡
(犘<0.05),gh.3´»FÚLˆö8
@cdœDŽ?¤9UV

‘“Ú}ñƒÙ‚
AUVwxìíTŽ?

I‘Xñ\+»F
%ˆ‰ÄAöWd…†QR

gh.M»FÚ
ó­DŽ?¤9¡UV

!ñÚ~끎?
83
!1# {õ|?:wxìíMNQRŽ?Tñ\+’5Á/0
T"#‰]tn†‡
(犘<0.05),!>Úrs
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Table4 Partialcorrelationanalysisofphenotypiccharactersdataoftheplantsaftergrazing
gF‰
Phenotypiccharacter
rpÂ
/犡2
Diameterof
theplant
rs
/犡3
Stemlength

/犡4
Stemnumber
}ñƒÙ‚A
/犡5
Crowndepth
}ñÞA
/犡6
Rootcolarwidth
ˆQA
/犢
Similarity
JròUÄA
/犡1
Projectivecoverdegree
0.5468 0.5117 -0.1262 -0.3183 -0.1215 0.1765
rpÂ
/X2Diameteroftheplant -0.3404 0.2272 0.3231 0.3903 -0.2648
rs
/犡3Stemlength 0.5730 0.1872 0.3194 0.3865

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