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

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showed no response to N, while C?AZOZ4 anð. Minn 64_62 showed earlier maturity in response to ttre first N increrner:t but delayed rnaturity at highrer N levels. 0n the o.bher hando C?O3OI.L â.^d C?O3O3Z showed only a delay in maturity as N increased " Ða¡¿s in Pos!--A.ntÌre s-Ls. No data were calculated for thÍs characteristic at Carnøn 79?6, N affected this pararne ter only at Carman I)lJ and Sanford l_926 (Table 39). At both sítes, the lower increments <strong>of</strong> N lengthened the pcst_ anthesis period, prinarily via delayed rnaturity (fa¡te 3?); howevern the effect <strong>of</strong> earl_ier heading at higher N levels at Carman t9Z5 (lable ll) was also j-nvolved " At both 1925 sites the tall genotypes had longer post_ anthesis periods than the semi-dwarfs, while i:n I)16 there ìirere no sígnificant dífferences at sanford and a cifferenee in favour <strong>of</strong> the semi-dwarfs at portage (table O0B). In general CZo3O]I a:nd C?O3O3Z had the shortest post_ anthesis periods and Minn 64-62 tøa the longest (fable 4oe¡, reflecting their differences in maturity. At portage, a9?6, although not demonstrated by the Duncanrs Multiple Range test (Table 4OA), the single degree <strong>of</strong> fr.eeriom comparison (rable 39) indicated thåt \Iinn 64-62 had a signÍficantly longer post-anthesis period than Bonanza. the F x G interaetion at Car¡na ^ Lg?s was due t,o Õ?OZAZ4 showing no significant response to nitrogen, while the other genotypes did (fable ¿llB), Differences between genotype s LT4
lab1e 39,. NLtrogen Fertllf¿er Appllcatlon Study, À¡¡OVA for Days tn post-Anrhesis. source <strong>of</strong> varlatlon df carinån 1975 ?orrage 1975 lanfo¡d 1976 carman 1976 portaÂe 1976 Replicates - .3 3,L7 8.45 3,50 NO DATA 22.4i FertillzerÊ (¡) 4 88.2I*'r 8,32 3.49ir* g,2g Errot (a) 12 s.66 7 J4 0,49 5.54 68.68** 48.40*'t l3.lg*'r 8,97¡r* 20,91,t:* 8,l?¡t 2.4L 34.56*:r 4.90 0.40 8, to,r* o,to gg.z3tttt 36.10'r* 4,23* I I.O3¡r cenotypes (C) 4 fTalls vs eeml-dr,7årf6 Bona¡¿a vs C702024 Bonarizå vs C703011 50.63¡+'t 38.03,r,r 6,40,r Il.O3,r 24.03*r. 32.40,+¡1 11.03*:t I8,23*¡t Bonanza vs C703032 Bonênza vs Minn64-62 ! xG 3.60'r 1.60 Coefffcíent <strong>of</strong> våriabl.llËy Z . (l) Error(a) 8.9 9.5 2,4 A.l , ,, (2) Error(b) 5.0 4.5 3.4 * s,7 ¡ "1i" ** i siÀnlflcant at ?=0,01. .+ slngle degree <strong>of</strong> freedon coûÞarlsons áre orthogori¿l, but not ê11 fro¡n the.sar¡e nutually orthogonål set, H !t1
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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
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Stanberry and Lowrey (L965) reporte
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Íright be of grea
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from varyíng seeding rates in barl
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Reports on the effect of</s
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the effect of seed
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l,upton et 41. (7974) pointed out t
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Table 3. Pedigrees of</stro
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(4) 200 Kernel weight * record.ed i
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population, using individual line m
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Site Sanford 19?6 Clay Cawnan 19?6
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Orthogonal single degree of
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Experiment lV: _-.t0qlepptite lenet
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ferences between genotype s which w
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and plant
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Table 7. con¡tonêlts of</
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was significant" fhe only case in w
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(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 and 102: Table 15. NíËrogen ¡'ertil,izer
Page 103 and 104: lable 16. Nltrogen Fertlllzer Appll
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: Table 38. Nitrogen Fertllizer Appli
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
Page 153 and 154: Table 55. Seeding Rate - Ror'7 Spac
Page 155 and 156: Table 57. Seeding Rate - Roúr Spac
Page 157 and 158: while the tall sho\^/ed virtually n
Page 159 and 160: Table 59. Seedlûg Rate - Row Spacl
Page 161 and 162: Table 60. Seedlng Rate - Row Spacin
Page 163 and 164: Table 61. Seedlng Rate - RotT Spaci
Page 165 and 166: Table 62, SeedLng Rate - Rorar Spac
Page 167 and 168: ?áble 64. Seedlng Rare - Ror.r Spa
Page 169 and 170: Table 65. SeedÍng Rate - Row Spaci
Page 171 and 172: Table 67. Seedfng Rate - Row Spací
Page 173 and 174: Table 68. AN0VA for Coleoptile Leng
Page 175 and 176: 'Iable 72. Means for Experíment IV
Page 177 and 178: Table 73. (Continued ) B Variables
Page 179 and 180: 'IabLe 74' Ranks of</strong
Page 181 and 182: 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
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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
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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
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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
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One of the problem
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The associatíon between root growt
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GENER¡.L DTSCUSS]ON Since desired
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inheríted" observation of<
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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
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height genotJpes t
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ïn terms of the o
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Concern has been expressed by dryla
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), +. ( 6, 7, Attempts should be ma
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Beech' D.F" and M.J.T, Norman. 196g
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Day, A.D, and R.K. Thonpson, 1970.
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Guitard, 4,4., J.A. Neûrnan, and p
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Konishi, T. L976. The nature and ch
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Pawlisch, P.E., and H.L. shandp. Lg
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Sisler, I^I.I^I, and p.J. Olsen. 19
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trIoodward, R.trI. 7956. The effect
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Appetrdr*' cenotvprc ìlêans fot j
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^ppendlx conrlnue¿- Genotype Plán
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.9anul¡uor xlpuâd¡¡V ezro tzz ,
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^pIe¡¡¿tx conrtnued. Solu It lß
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¿\tÎen¿lr conÈtnu€d, .,¡ÃE
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