Effects of reduced plant height on breeding requirements and ...

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$pikei: pqr llnii Area. The ANOY¡, (fable 16) indica-ted that inc::easing N significantly increased the nurnber <strong>of</strong> spikes per unit area as previou.sly reported by several workers including Konishi (f9?6) and Gardener and RathjerL (I9?Ð" This increase wâs primaril¡r lirniied to the initial inerement <strong>of</strong> N, except ai Carroan in Ig?S where the response continued_ throughout al.L N increments and at Sanford in 1pf6 where there was a sign.if icant response to the finai N increment (ta¡re r?c ) . the AtiûVA (îabl_e 16) indicated signåficant d j_fferences among genotypes for spíkes per unit area existed, and that no F x G interaction óccut:red. Further analysis (fable 16) indicated significant differences between the talls and semi-dwarfs at al-1 sites in 3-976, This difference was in favour <strong>of</strong> the se¡ní-dwarfs (ta¡re r?n). Further single degree <strong>of</strong> freedom comparisons (Iabie l_6) and the data <strong>of</strong> Table 174 show that most <strong>of</strong> the advantage <strong>of</strong> the semi-dwarfs came from Mir:lf. 64-62, Õ?o3o3z showed an advantage over the talls at the lpf6 sites, but semi- dwarf C703011 was, in fact, lower in spÍkes per unit area than the ta11s in three <strong>of</strong> the five experinents" lhe di.sagreement between the analysis <strong>of</strong> Tabl_e 16 and the lack <strong>of</strong> significant differences ind.icated at Carman, :..975 in Table 174 arose because the test used in the latter case was less sensitive tlran the single degree <strong>of</strong> freedom comparison eraployed Ín îable 16. This si-ngle Cegree <strong>of</strong> 84
lable 16. Nltrogen Fertlllzer Appllcatlon Srudy, À:IOVA for Sp{kes/unLr areâ. 2365.72 t5r3.32 566.s7 1309, s6 467.72 3135 ,56'r'r 2736.06t tt 4 Replicates ¡ertilizers (F) t5¡0.¿3¡.i 1587.52'r't 9719,93r,¿. 418,37 240,29 l2 E¡ror (a) 344.07 274.52 94.10 521.32ri . 205,34 cenorypes (G) L68L 26'r'r t312.05't'r 1550,48¡¡* 1822.6Y.* tÎa11s vs se¡nl-dlra¡fg 932,5r* 2242.67*rt 4320 ,17** 82, L4 202,50 7 .23 Bona¡^za vs C7O2O24 o.40 108.90 40.00 7 48.23 9 31 .2 3't 18.23 Bolrânza vs C7030I1 230.48 697 .23 270,40 ,40 Bonanzã vs C703032 220.90 15 75.03*¡r 1768.90** 4100.63*¡t 2805.63r.¡r 1254,44tt Bonan¿a vs Mlflr64-62 3648.I0¡r* .!xLi I12.89 318.46 196,54 Coefficj.ent <strong>of</strong> vårfåbllLty 7, , r8.2 20.5 8.8 22.4 re.3 Ílì å::::Í;ì @ ** F sigr¡ificant ar p-0.01. t singte degree <strong>of</strong> f,¡eedo¡r cornPa!16o¡t6 ate orÈhogor¡ál, but not â11 ftoñ the sår¡e nutually orthogo¡ral aet.
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University of Mani
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ACKNOWI,EDGMENTS It has been a grea
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ÎABI,E OF TONTENTS av írÞâ dô
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Þâ o-â r Days to l'{aturity ....
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vaal ËÞe rro Days to Heading . ".
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SUGGÊSTIONSFORFIIIURSRESEÀRCH ,.,
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11. Nitrogen Fertil-izer Applicatio
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TABT-,8 42, 43, I+4, r+5. 46. 48. 4
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74. 75" ?6, 77, 78,. 79, 80. 81" 82
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xvii i occurred for yield, but the
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I]TERATURE REVIEW Semi-dwarf Growth
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In the United States the barley bre
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Tabl-e 1. Broad Sense Ileritability
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Table 2. Broad Sense Heritability E
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wíth yield. fhis group discussed t
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ship in common wheat. 0n the other
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c onpared 'r . Two other important
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eported a non-significant positive
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majority of studie
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correfation between diastatic power
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extent. Frey et al-. (1951) indicat
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seni-dwarf wheats to nitrogen ferti
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number of spíkes
Page 47 and 48:
Stanberry and Lowrey (L965) reporte
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Íright be of grea
Page 51 and 52: from varyíng seeding rates in barl
Page 53 and 54: Reports on the effect of</s
Page 55 and 56: the effect of seed
Page 57 and 58: l,upton et 41. (7974) pointed out t
Page 59 and 60: Table 3. Pedigrees of</stro
Page 61 and 62: (4) 200 Kernel weight * record.ed i
Page 63 and 64: population, using individual line m
Page 65 and 66: Site Sanford 19?6 Clay Cawnan 19?6
Page 67 and 68: Orthogonal single degree of
Page 69 and 70: Experiment lV: _-.t0qlepptite lenet
Page 71 and 72: ferences between genotype s which w
Page 73 and 74: and plant
Page 75 and 76: Table 7. con¡tonêlts of</
Page 77 and 78: was significant" fhe only case in w
Page 79 and 80: (28 to 5B/"), as reported by nost o
Page 81 and 82: Table 8. Continued Range Lor{est Li
Page 83 and 84: the Highest Yielding l,ines within
Page 85 and 86: Phenot:'¡pic Corre-Lations Sinpl-e
Page 87 and 88: Table 10. (Cortínued) Châracteris
Page 89 and 90: did Syme (f972), Fonseca and patter
Page 91 and 92: significant negative correlation wi
Page 93 and 94: elãted negative association betwee
Page 95 and 96: Aglononie ChArae'qeri s! ic s Pl"an
Page 97 and 98: Table 12. N1Ërogen FertLlizer Àpp
Page 99 and 100: Teble 14. NltrogeÍ FertLlLzêr ApP
Page 101: Table 15. NíËrogen ¡'ertil,izer
Page 105 and 106: freedom comparison indicated lqínn
Page 107 and 108: lab1e 19. Nftrogen trertÍlizer Áp
Page 109 and 110: Tâble 20, Nltrogei¡ FeltLltzêr A
Page 111 and 112: TabIe 22, Nltrogen Fertillzer Appli
Page 113 and 114: Table 23. Nitrogen Fertilizer Appl
Page 115 and 116: TabLe 25. Nltrogen Fefttlizef Appll
Page 117 and 118: itable 26. Nitrogen Fertfllzer Appl
Page 119 and 120: latlê 28. Nltrogen ¡'ertlllrer Ap
Page 121 and 122: Sanford â.nd Carnan, 1926, Since N
Page 123 and 124: Tabl-e 31 . Nítrogen Fertilizer Ap
Page 125 and 126: Îable33. Nítrogen Fertllizer Appl
Page 127 and 128: Table 34. Nitrogen Fertilfzer Appli
Page 129 and 130: îab1ê 36. NLtrogeî Fertl,LLzer A
Page 131 and 132: Table 38. Nitrogen Fertllizer Appli
Page 133 and 134: lab1e 39,. NLtrogen Fertllf¿er App
Page 135 and 136: Table 41. Nitïogen Iertillzer Appl
Page 137 and 138: Table 42. Nitrogen Fertllizer Appli
Page 139 and 140: 'IabLe 44. Nítrogen ¡'ertilizer A
Page 141 and 142: Q UAT,TTY Cltq.RÀcTER rsrf ts Q ua
Page 143 and 144: lable 47. Nitrogen ¡'ertilLzer App
Page 145 and 146: Table 49. Nltrogen ferrlllzer AppLl
Page 147 and 148: îhe F x G i.nteraction at portage
Page 149 and 150: fable 52, Nltrogen Fertfllze¡ Appl
Page 151 and 152: 'labLe 54- Seedlng Råte - Row Spac
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Table 55. Seeding Rate - Ror'7 Spac
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Table 57. Seeding Rate - Roúr Spac
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while the tall sho\^/ed virtually n
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Table 59. Seedlûg Rate - Row Spacl
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Table 60. Seedlng Rate - Row Spacin
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Table 61. Seedlng Rate - RotT Spaci
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Table 62, SeedLng Rate - Rorar Spac
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?áble 64. Seedlng Rare - Ror.r Spa
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Table 65. SeedÍng Rate - Row Spaci
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Table 67. Seedfng Rate - Row Spací
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Table 68. AN0VA for Coleoptile Leng
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'Iable 72. Means for Experíment IV
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Table 73. (Continued ) B Variables
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'IabLe 74' Ranks of</strong
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Table 76. cenotype Means for Root D
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fabTe ?6 Cid not indicate this diff
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Table 79. Ranks of
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Tabl"e 81. ANOVA for Number <strong
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the second v¡as not significant (f
Page 191 and 192:
Table 85. Mean Numbers of</
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of two locations f
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have increased the precision <stron
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showed no environmental interaction
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yield testlng experiments. Furtherm
Page 201 and 202:
could in part account for the poor
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signlficant, the correl_ations were
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height and the qua
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trial period. The area in which the
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any specific cross. However, they d
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as strong nor as consl-stent as is
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with several critical agronomic par
Page 215 and 216:
maturity and days in post-anthesis
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significantry rerated to several ot
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icularly when nore optimum growing
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would be useful to know the rerativ
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Kernel Weight Added N had little ef
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much as the tall genotypes. Also th
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îhe effects of N
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with the overall results of
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Phenotypicaì.J_y novel gernplasm,
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drastícaIIy changed phenotype as t
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should not be recomnended for produ
Page 237 and 238:
One of the problem
Page 239 and 240:
The associatíon between root growt
Page 241 and 242:
GENER¡.L DTSCUSS]ON Since desired
Page 243 and 244:
inheríted" observation of<
Page 245 and 246:
indicated by this study suggests th
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individual lines. It is generally c
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sístent suppLy of
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possibílity of ir
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Testing et one site for one year wa
Page 255 and 256:
height genotJpes t
Page 257 and 258:
ïn terms of the o
Page 259 and 260:
Concern has been expressed by dryla
Page 261 and 262:
), +. ( 6, 7, Attempts should be ma
Page 263 and 264:
Beech' D.F" and M.J.T, Norman. 196g
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Day, A.D, and R.K. Thonpson, 1970.
Page 267 and 268:
Guitard, 4,4., J.A. Neûrnan, and p
Page 269 and 270:
Konishi, T. L976. The nature and ch
Page 271 and 272:
Pawlisch, P.E., and H.L. shandp. Lg
Page 273 and 274:
Sisler, I^I.I^I, and p.J. Olsen. 19
Page 275 and 276:
trIoodward, R.trI. 7956. The effect
Page 277 and 278:
Appetrdr*' cenotvprc ìlêans fot j
Page 279 and 280:
^ppendlx conrlnue¿- Genotype Plán
Page 281 and 282:
.9anul¡uor xlpuâd¡¡V ezro tzz ,
Page 283 and 284:
^pIe¡¡¿tx conrtnued. Solu It lß
Page 285:
¿\tÎen¿lr conÈtnu€d, .,¡ÃE
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