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

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Genotype s differed sågnificantly only at Carman, where Bonanza averaged approximate ly six more kernels per spike than the semi-dwarf (fable 61). This behaviouro different fron that at the other sites, as well as the laek <strong>of</strong> inter* actions at Carman, can be attributed to the inabiJ.ity <strong>of</strong> the semi-dwarf to cope with the high l-evels <strong>of</strong> stress at this site. Significant reductions in kernels per spike occurred at all sites as seeding rates irìcreased (Table 61). A sínílar result was previously reported by Guitard et at. ( 1961). Row spac ing did not significantly affect kerneJ-s/spike in this study (fable 6o). Sígnificant genotype by seedÍng rate and genotype by row spacing interactions occurred at Sanford (faefe 6O¡. The first <strong>of</strong> these oceurred due to the tall genotype r s kernel nurcber per spike declining significantly with each seeding rate increase, while the seni-dwarf.s declined only with the first increment, and did not drop as rnuch (Table 61). îhe second interaction occurred because the sem,i.- Cwarf showed fewer kernels per spike as row spacing narrowed., while the ta]1 genotype showed the reverse (fable 61). A second order genotype by seeding rate by row spacing interaction occurred at ïfinnipeg (fable 60). The semi-dwarf had more kernels per spike at the narrowest row spacing and lowest seeding rate, and as the seeding rate increased at that spacing the tall genotype beca¡ne superior in kernels L44
Table 61. Seedlng Rate - RotT Spaci.ng Study, Means for Kernels/splke. 51.1a 4g.O b 5!.2a 5l .7 a 42.5a 51 . 0a Genotypes Bonanza Minn64-62 (2) 84.0 5O.Za (3) 112.0 45.1ab 51.3ab 48.3a 43.4a 50.0a (1) 15,0 50.3a (2) 30.5 46.5a 50,1a 52.ta (3) 6t.0 47.2a 51.0a 51.8a 43.5a 5r.ta ----EÎF- +o.o 5z.o ___Br:t _ seedins Rare (1) seedtng Rate (2) --l;iì--r¿.+ 50.4 50.0 Seeding 50. Rate (3) i 4o,2 5r,7 s0.8 46 .O 50. 6 45 .6 4I .Z 50. 0 sO. 1 Row Spacing (2) Row Spacing (3) Ror^7 Spacing Row Spacing (2) Row Spacing (3) - 48.1 4s.o s1.8 40 .3 41 . 8 53.2 48,4 48 .5 48.5 47 .8 52,7 50. 8 55.1 56.7 * val-ues rn a cor.usn'f orlowed by the same letter are not sígníficantly dr.fferent, p=0.05.
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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
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Table 8. Continued Range Lor{est Li
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the Highest Yielding l,ines within
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Phenot:'¡pic Corre-Lations Sinpl-e
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Table 10. (Cortínued) Châracteris
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did Syme (f972), Fonseca and patter
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significant negative correlation wi
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elãted negative association betwee
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Aglononie ChArae'qeri s! ic s Pl"an
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Table 12. N1Ërogen FertLlizer Àpp
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Teble 14. NltrogeÍ FertLlLzêr ApP
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Table 15. NíËrogen ¡'ertil,izer
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lable 16. Nltrogen Fertlllzer Appll
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freedom comparison indicated lqínn
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lab1e 19. Nftrogen trertÍlizer Áp
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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
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: Table 60. Seedlng Rate - Row Spacin
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
Page 183 and 184: fabTe ?6 Cid not indicate this diff
Page 185 and 186: Table 79. Ranks of
Page 187 and 188: Tabl"e 81. ANOVA for Number <strong
Page 189 and 190: the second v¡as not significant (f
Page 191 and 192: Table 85. Mean Numbers of</
Page 193 and 194: of two locations f
Page 195 and 196: have increased the precision <stron
Page 197 and 198: showed no environmental interaction
Page 199 and 200: yield testlng experiments. Furtherm
Page 201 and 202: could in part account for the poor
Page 203 and 204: signlficant, the correl_ations were
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Page 207 and 208: trial period. The area in which the
Page 209 and 210: any specific cross. However, they d
Page 211 and 212: 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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