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

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significantl)' to the fÍ¡'st N increment" Bonanza and CZO3011 ¡aaj"ntained this increased kernel weight at the higher N levels, while C703O32 anò. ltlir:r:' 64-62 showed a decrease at the very highest N level. At Sanford, l.9?6, tl¡¡e interaetion (fable 23) ârose because C703011 and Bonanza shov¡ed no significant response to N, while the other genotypes all showed a negative resporÌse to the first incrernent <strong>of</strong> N, with Minn 64-62 showing thi.s negative response through to the highest N leve I . C701011 was consistently 1owest in kernel weight and. Bonanza was highest (ga¡te e:_¡,). The other genotypes were intermediate, with CTAZaZ\+ having ker.ne 1 weight not significantly different fron tsonanzao fhe very l-ov¡ error j-n ¡neasure¡nent <strong>of</strong> kernel weight ena.bled detection <strong>of</strong> the F x G i-nteractions. Ðegree sf l,odeitg. Lcdging occurred only in the two 19?5 trials. ANOVÀ and treatment mearrs are reported j-n lables 24 and 25, ,Applied N had a sÍgnifica.nt effect on}-y at portage, and lociging increased as did the rate <strong>of</strong>, applied N (fable 25C). Eaeh N incremen* gave significantly rnore l-odging. No significant effect <strong>of</strong> N was found at Carman due to the very 1ow lodgíng leve1s ¡ however, a trend toward more lodging as N increased existed (faufe z5C). Ä similar effect <strong>of</strong> N was previously reported by Pendleton e$. Al.. 94
Table 23. Nitrogen Fertilizer Applícation Study. Fertll-lzer x Genotype rnteraetíon Means for 200 Kernel l^reight ât sanford, 1976. Nitrogen AppJ-ted (kg. /ha. ) 6 .92 b 6.95 b 6 .42a 6.47 a 6.42a 7.15 c 6.97 I>c 6,47a 6.50a 6.65ab 7 .72 b 6.97 b 6 ,55a 6 .50a 6.97 1, 7.O7 bc 7.35 c 6 .55a 6 .87 ab 7 ,00 bc + 7 .25' b 7 .52 b 6.77a 7 .25 b 7.40 b Bonanza c702024 c703011 c7 03032 Mlnn64-62 Genotypê Nitrogen Applted ' (kg./ha.) Bonanza C702024 C70301 C7O3O32 _ Minn64_62 0.00 L25a 7.52 b 6.77a 67 ,26 7,25 b 7.4O c 7 .07 a 7 .35ab 6 .55a 6 134 .52 .87 ab 7 .00 bc 7 .I2a 6 .97 a 6 201.78 ,55a 6. 50a 6 .97 bc 7.t5a 6.97a 269.04 6-.¡1" 6.92a 6.50a 6.65ab 6.95a 6.42a 6.47a 6.42a
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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
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 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: TabIe 22, Nltrogen Fertillzer Appli
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 and 162: Table 60. Seedlng Rate - Row Spacin
Page 163 and 164:
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
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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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