全 文 :!23" !5#
Vol.23 No.5
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Sep. 2015
犱狅犻:10.11733/j.issn.10070435.2015.05.022
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犘犪狋狋犲狉狀狊狅犳犕狅狉狆犺狅犾狅犵犻犮犪犾犞犪狉犻犪狋犻狅狀犪狀犱犃犵狉狅狀狅犿犻犮犜狉犪犻狋狊犻狀犃犠狅狉犾犱狑犻犱犲
犛犪犿狆犾犲狅犳犘狉犪犻狉犻犲犌狉犪狊狊犌犲狉犿狆犾犪狊犿
MAXiao1,ZHOUChaojie1,ZHANGChenglin1,SUNMing1,GUOZhihui1,
WANGXiaoli2,ZHANGJianbo2
(1.ColegeofAnimalScience&Technology,SichuanAgricuralUniversity,Yaan,SichuanProvince625014,China;
2.GuizhouInstituteofPrataculture,Guiyang,GuizhouProvince550005,China)
犃犫狊狋狉犪犮狋:Detectingthediversityofgermplasmcolectionisimportanttoplantbreedersforutilizingand
managementthecolectionefficientlyandeffectively.Atotalnumberof87prairiegrass(犅狉狅犿狌狊犮犪狋犺犪狉狋犻
犮狌狊)accessionswithworldwidegeographicoriginswerestudiedinfieldattheYaancityofSichuanprov
ince,andninephenotypiccharacterswererecorded.Accordingtothecoefficientsofvariation,alstudied
characteristicsshowedahighdegreeofvariability,butitwerehighlypronouncedfordrymatterperplant,
tilernumberandleafwidth.Themajorityofsignificantcorrelationcoefficientswerefoundinthetraitsre
presentingplantsize.Steamdiameterandlengthoffirstinternodehadsignificantlypositivecorrelations(犘
<0.01)withothers,andthecorrelationcoefficientbetweenlengthofsecondupperleafandbreadthofflag
leafwasthehighestone(狉=0.912,犘<0.01).Principalcomponentanalysis(PCA)wasperformedfor
phenotypicaldiversitydeterminationandgroupingofgermplasmcolections.Twoprincipalcomponents
werefoundtoexplain74%ofthetotalvariationinthedependencestructure.Plantsizecharacterstogether
withtilernumberappearedtobethemajorsourcesofdiversityamong犅.犮犪狋犺犪狉狋犻犮狌狊accessions.Basedon
theclusteranalysisusingUPGMA method,accessionsincludedinthreemainclusters,firstgrouphad
largeplantsizewithbroadleaves,widerstemsandmediumtilersnumber,secondhadmediumplantsize,
andthirdhadsmalsizewithnarrowleavesandlargetilersnumber.Scatterplotusingtwofirstprincipal
componentscoresalsoconfirmedthegroupingbyclusteranalysis.Overal,thestudydemonstratesthat犅.
犮犪狋犺犪狉狋犻犮狌狊isahighlyversatileforagespeciesandthequantitativetraitdiversityinthegermplasmhassig
nificanceforforagegrassbreedingprogramsandfuturecolectingstrategies.
犓犲狔狑狅狉犱狊:犅狉狅犿狌狊犮犪狋犺犪狉狋犻犮狌狊;Morphologicaltrait;Variability;Germplasm;Diversity
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Table1 Accessionsofprairiegrassusedinthestudy
º
No
Code
Origin
yQ
Type
º
No
Code
Origin
yQ
Type
1 PI158372 Z3 NewZealand U 45 PI316174
©**Ð
,
\[RÝ
CapitalTerr,Australia
U
2 PI168556 ©**Ð Australia U 46 PI316175
©**Ð
,
\[RÝ
CapitalTerr,Australia
U
3 PI168564 ©**Ð Australia U 47 PI316177
©**Ð
,
\[RÝ
CapitalTerr,Australia
U
4 PI185500 mSouthAfrica U 48 PI331171 j¼,Argentina U
5 PI187000
¨¬
,
jÚm
Alaska,UnitedStates
W 49 PI331172 j¼,Argentina U
6 PI193144 ·ÚUruguay Cm 50 PI337517 j¼,Argentina U
7 PI195476
m
,
G ½
Transvaal,SouthAfrica
U 51 PI338633 Ýé,Morocco U
8 PI197848 j¼Argentina U 52 PI377533 +T,¬¥ Tokyo,Japan W
9 PI197849 j¼Argentina U 53 PI409137
m
,
U¥2
CapeProv,SouthAfrica
W
10 PI202359
j¼
,
Ö42
LasRosas,SantaFe,Argentina
Cm 54 PI409138
m
,
U¥2
CapeProv,SouthAfrica
W
11 PI202360
j¼
,
Ö42
LasRosas,SantaFe,Argentina
Cm 55 PI409139
m
,
U¥2
CapeProv,SouthAfrica
W
12 PI202693
·Ú
,
°Ý-Ð
Colonia,Uruguay
U 56 PI413792 Ó¬France U
13 PI203616
µ3
,
*&2
PortoAlegre,Brazil
W 57 PI436806
¨¬
,
GOm
Texas,UnitedStates
W
14 PI204157
·Ú
,
ÕIBÐ
Montevideo,Uruguay.
W 58 SBC001 +¬,_}Sichuan,China W
15 PI209100
©**Ð
,
3©2
WesternAustralia,Australia
U 59 SBC002 +¬,_}Sichuan,China W
16 PI217582
֬
,
GÕkG0
TamilNadu,India
W 60 SBC003 +¬,ìQujing,Yunnan,China W
17 PI217583
֬
,
GÕkG0
TamilNadu,India
W 61 SBC004 +¬,ìQujing,Yunnan,China W
18 PI217593
֬
,
GÕkG0
TamilNadu,India
W 62 SBC005 +¬,_}Yaan,Sichuan,China W
19 PI219801 È*,ÖñÐéSantiago,Chile U 63 SBC006 +¬,_}Yaan,Sichuan,China W
20 PI219802 È*,ÖñÐéSantiago,Chile U 64 SBC007 +¬,_}Yaan,Sichuan,China W
21 PI219804 È*,ÖñÐéSantiago,Chile U 65 ChapelHil
¨¬
,
î@Ð
Georgia,UnitedStates
C
22 PI237793 3%Spain U 66 PI478512 ƱPeru W
23 PI250648 µmKPakistan W 67 PI495807
+¬
,
c
InnerMongolia,China
Cm
24 PI273869 ÀÈÐEthiopia W 68 PI595114
¨¬
,
ÐÚµÙ
Alabama,UnitedStates
W
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No
Code
Origin
yQ
Type
º
No
Code
Origin
yQ
Type
25 PI283202 Ó¬France U 69 PI595115 ¨¬UnitedStates W
26 PI283204 +TJapan U 70 PI595116
¨¬
,
G33È
Mississippi,UnitedState
W
27 PI283205 mSouthAfrica U 71 PI595117
¨¬
,
G33È
Mississippi,UnitedState
W
28 PI284108 È*Chile U 72 PI595118
¨¬
,
G33È
Mississippi,UnitedState
W
29 PI284109 mSouthAfrica U 73 PI595120
¨¬
,
ÀOÚJÙ
UnitedStates
W
30 PI284110 mSouthAfrica U 74 PI595122 ¨¬,º=
UnitedStates W
31 PI284111 mSouthAfrica U 75 PI595124
¨¬
,
GOm
Texas,UnitedStates
W
32 PI292258 H¬UnitedKingdom. U 76 PI595125
¨¬
,
GOm
Texas,UnitedStates
W
33 PI299500
m
,
®ë2
FreeStateProv,SouthAfrica
W 77 PI595128
¨¬
,
GOm
Texas,UnitedStates
W
34 PI303640
m
,
®ë2
FreeStateProv,SouthAfrica
U 78 Primabel Ó¬France C
35 PI304864
j¼
,
Öâ=
SantaRosa,Argentina
W 79 Belegarde Ó¬France C
36 PI306289
©**Ð
,
Zk½
NewSouthWales,Australia
U 80 Meribel Ó¬France C
37 PI308503 Ʊ,Ú%=ÐPeru W 81 Anabel Ó¬France C
38 PI308506 Ʊ,Ú%=ÐPeru W 82 W610414
¨¬
,
ÐÚµÙ
Alabama,UnitedStates
W
39 PI308507 Ʊ,Ú%=ÐPeru W 83 W610415
¨¬
,
DmÝ
UnitedStates
W
40 PI309955
µ3
,
*&2
RioGrandedoSul,Brazil
U 84 W610423
¨¬
,
G33È
Mississippi,UnitedState
W
41 PI309957
µ3
,
*&2
RioGrandedoSul,Brazil
U 85 W610432
¨¬
,
GOm
Texas,UnitedStates
W
42 PI309958
µ3
,
*&2
RioGrandedoSul,Brazil
U 86 JiangxianÞ +¬,©4 Hubei,China C
43 PI315677
"-m
,
"-m¶
Tunis,Tunisia
U 87 Qiannan +¬,p2Guizhou,China C
44 PI316173
©**Ð
,
\[RÝ
CapitalTerr,Australia.
U
ò(Note):U=¾ìTYhUncertainimprovementstatus;W=": Wildmaterial;C=GYCultivar;Cm={Cultivated
material
2 lmY;n
2.1 }3p>?3;n
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P2),]j9e8(IPAB
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,
noAp
zÆG34.89%=33.68%,ÒüG+è、!à
u
、¨
©ª
、
ÑÛ©ª
,
noApzÆG21.15%,
21.00%,27.51%,25.93%,noÚ¨vwBG
ì
、¨
©u
、
ÑÛ©u
,
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16.79%,15.91%。hs,]¾@A
û
、
X^û!ûÎ@:
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2.2 }3pUÀ;n
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Table2 Descriptivestatisticsincludingmeanvalues,minimum,maximum,standarddeviations
fortraitsandsignificantdifferencebetweenstudiedgermplasm
gh
Character
ì
PH/cm
+è
SD/mm
!àu
LFI/cm
¨©u
LFL/cm
¨©ª
WFL/cm
ÑÛ©u
LSUL/cm
ÑÛ©ª
WSUL/cm
zÖp
TN
ÜC
DWY/g
õ Means 131.9 3.8 19.1 30.4 0.9 35.0 1.1 41.0 29.8
v*õ Max 170.49 5.6 29.01 40.33 1.38 44.19 1.68 104.2 67.3
vwõ Min 77.94 1.83 8.98 16.71 0.27 19.65 0.34 19 14.1
¬»DS.D 21.647 0.797 4.005 5.110 0.247 5.574 0.274 13.792 10.381
noAp犆.犞 0.1641 0.2115 0.21 0.1679 0.2751 0.1591 0.2593 0.3368 0.3489
\3 :t;z
}3p0ëïUÀ;n
Table3 Onwayanalysisofvarianceofdifferenttraitsinprairiegrassgermplasm
ghCharater 犉õ犉ratio
N Meansquares
YùBetweenaccessions Yù Withinaccession
ìPH/cm 100.57 4686.12 46.60
+èSD/mm 24.58 6.36 0.26
!àuLFI/cm 11.05 160.42 14.51
¨©uLFL/cm 17.82 261.08 14.65
¨©ª WFL/cm 22.82 0.61 0.03
ÑÛ©uLSUL/cm 22.50 310.65 13.81
ÑÛ©ª WSUL/cm 30.22 0.75 0.02
zÖpTN 57.35 1902.16 33.17
ÜCDWY/g 102.33 1074.92 10.50
ò(Note):犘<0.05and犘<0.01
2.3 3p0Që|6;n
K87T^5dBPQghpõ;i@
z{
(
P4),lmPJ1PQghB@
g
。
Ò++è=!àu8Ò-8egh
r@
,¨
©ª8ÑÛ©ªB@gv
(狉=
0.912,犘<0.01),ÒüG¨©u8ÑÛ©u(狉=
0.801,犘<0.01),!àu8¨©u(狉=0.422,犘
<0.01)=ÜC(狉=0.421,犘<0.01)@gã;z
Öp8+è
(狉=-0.242,犘<0.05)=!àu(狉
=-0.236,犘<0.05)rí@。ÜC=
zÖp
(狉=-0.223,犘<0.01)rí
@
,
8Ò-7eghrð@,Ò+8
ì
(狉=0.668,犘<0.01)@gv。ì、©u、©
ª
、
+è!ghKT^5dÜCÃrð
@@Apì
(犘<0.01),¥ô=§T^5
dãöYù3C>?Ð÷gh
。
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Table4 Bivariatecorrelationsamongninetraitsinprairiegrassgermplasm
gh
Character
ì
PH
+è
SD
!àu
LFI
¨©u
LFL
¨©ª
WFL
ÑÛ©u
LSUL
ÑÛ©ª
WSUL
zÖp
TN
PH 1.00
SD 0.727 1.00
LFI 0.614 0.454 1.00
LFL 0.686 0.685 0.422 1.00
WFL 0.700 0.655 0.546 0.700 1.00
LSUL 0.729 0.697 0.506 0.801 0.711 1.00
WSUL 0.718 0.653 0.525 0.673 0.912 0.680 1.00
TN -0.162 -0.242 -0.236 -0.078 -0.08 -0.093 -0.098 1.00
DMY 0.668 0.590 0.421 0.565 0.566 0.642 0.556 -0.223
ò(Note):犘 <0.05and犘<0.01
2.4 1Y;;n
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BPQghžázz{
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ghTraits
RSLëEigenvectors
!1¾ázPC1 !2¾ázPC2
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+èSD 0.353 -0.083
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ÑÛ©uLSUL 0.370 0.122
ÑÛ©ª WSUL 0.367 0.133
zÖpTN -0.091 0.918
:9ëDWY 0.335 -0.063
RSõEigenvalue 5.583 1.048
ħ5Percentofvarianceexplained/% 62.035 11.648
Áħ5Cumulativepercentofvarianceexplained/% 62.035 73.683
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Ⅰ 155.67Aa 4.55Aa 22.17Aa 35.25Aa 1.10Aa 40.27Aa 1.29Aa 36.9Aa 43.37Aa
Ⅱ 132.61Bb 3.82Bb 19.27Bb 30.83Bb 0.94Bb 35.56Bb 1.10Bb 39.6Aa 28.35Bb
Ⅲ 100.83Cc 2.60Cc 14.71Cc 22.99Cc 0.49Cc 26.77Cc 0.62Cc 45.8Aa 18.07Cc
犉test 78.04 69.43 22.85 64.06 95.35 66.75 77.35 2.57ns 69.63
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