Details for: PI 550440, Zea mays L. subsp. mays, 'B64'


Summary Data
Taxonomy:
Zea mays L. subsp. mays
Cultivar:
'B64'
Origin:
Developed – Iowa, United States
Received by NPGS:
1966
Improvement Status:
Breeding material
Reproductive Uniformity:

Highly inbred
Form Received:
Seed
Life Form:
Annual
Life Cycle:
Annual
Availability
FormQuantityNoteInventoryCart
Seed100 countPI 550440 94ncai01 SD
 
Images (6 total. Click on image for more.)

KERNELS

Core Passport Data
Taxonomy:
Zea mays L. subsp. mays
Cultivar:
'B64'
Origin:
Developed – Iowa, United States
Received by NPGS:
1966
Improvement Status:
Breeding material
Reproductive Uniformity:

Highly inbred
Form Received:
Seed
Life Form:
Annual
Life Cycle:
Annual
Source History
Donated
1966.
Iowa, United States

Donor(s):
Accession Group(s)
Group name: Maize.Group.Ames.Panel.2010
Note: Original inbred accessions sent as Ames Panel in 2010.
To search for accessions in this group, click the following link. Maize.Group.Ames.Panel.2010

Group name: Maize.Set.Inbred.Diversity.282.Plus.NAM.Parents
Note: A maize collection of 282 Association Panel Inbreds and NAM (Nested Association Mapping) parental inbreds.
To search for accessions in this group, click the following link. Maize.Set.Inbred.Diversity.282.Plus.NAM.Parents

Group name: Maize.Set.Inbred.PVP.Application.Standard
Note: Standard Inbreds that are reference lines to be used in PVP comparisons for PVP application.
To search for accessions in this group, click the following link. Maize.Set.Inbred.PVP.Application.Standard

Accession Names and Identifiers
'B64'
Type: Cultivar name

'Iowa B64'
Type: Cultivar name

CIMMYTMA 23808
Type: CGIAR International Center Identifier
Group: CIMMYT-GGLOBAL-MAIZE
Matched with GENESYS data; 2025-05-22.

CIMMYTMA-023808
Type: CGIAR International Center Identifier
Group: SINGER-CIMMYT-MAIZE
The format of this identifier was CIMMYTMA-000000 with a dash and zero fill for numbers that were less than 6 digits in length.

V922-1
Type: Plot
OTHER idtype is field/row number.
Coe, Jr., Edward H. USDA, ARS

V922-2
Type: Plot
OTHER idtype is field/row number.
Coe, Jr., Edward H. USDA, ARS

V922-3
Type: Plot
OTHER idtype is field/row number.
Coe, Jr., Edward H. USDA, ARS

Narrative
Maturity is late AES800. Good tolerance to western corn rootworm (Diabrotica virgifera). Moderate resistance to first brood of European corn borer (Ostrinia nubilalis).
Zea mays L. subspp. mays
Genus:
Zea
Family:
Poaceae (alt. Gramineae)
Subfamily:
Panicoideae
Tribe:
Andropogoneae
Subtribe:
Tripsacinae
Nomen number:

311987
Verified:
07/15/1987 by ARS Systematic Botanists.
Other conspecific taxa
Zea mays L. (1531 active accession[s])
Zea mays L. subsp. huehuetenangensis (H. H. Iltis & Doebley) Doebley (6 active accession[s])
Zea mays L. subsp. mexicana (Schrad.) H. H. Iltis (128 active accession[s])
Zea mays L. subsp. parviglumis H. H. Iltis & Doebley (250 active accession[s])
Autonyms (not in current use), synonyms and invalid designations
Autonym(s)
Zea mays L. var. mays

Heterotypic Synonym(s)
Common names
LanguageNameAlternate namenoteseqCitation
Englishcorn  1Rehm, S. 1994. Multilingual dictionary of agronomic plants
Englishdent corn  1Terrell, E. E. et al. 1986. Agricultural Handbook no. 505
Englishfield corn  1Terrell, E. E. et al. 1986. Agricultural Handbook no. 505
Englishflint corn  1Terrell, E. E. et al. 1986. Agricultural Handbook no. 505
Englishmaize  1Wiersema, J. H. & B. León. 1999. World economic plants: a standard reference CRC Press, Boca Raton, FL.
Englishpod corn  1Terrell, E. E. et al. 1986. Agricultural Handbook no. 505
Englishpopcorn  1Terrell, E. E. et al. 1986. Agricultural Handbook no. 505
Englishsweet corn  1Terrell, E. E. et al. 1986. Agricultural Handbook no. 505
Arabicdura shami  2Boulos, L. 1999-. Flora of Egypt
Chineseyu shu shu玉蜀黍 2Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition).
Frenchmaïs  2Demilly, D. et al. 1996. Liste alphabétique des principales espèces de plantes cultivées et de mauvaises herbes. Noms latins et noms français, ed. 6. Note: GEVES-SNES, Beaucouzé, France
GermanMais  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Italiangranoturco  2International Seed Testing Association. 1982. A Multilingual Glossary of Common Plant-Names 1. Field crops, grasses and vegetables, ed. 2.
Italianmais  2International Seed Testing Association. 1982. A Multilingual Glossary of Common Plant-Names 1. Field crops, grasses and vegetables, ed. 2.
Japanese Rōmajitō-morokoshi  2Batra, L. R. 1995. Names of Japanese plants sorted by their Japanese names in Romanized Katakana and scientific nomenclature
Portuguesemilho  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Spanishmaíz  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Swedishmajs  2Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Transcribed Koreangangnaengi  2Mun-Chan, B. et al. 1986. A checklist of the Korean cultivated plants. Kulturpflanze 34:134.
Transcribed Koreanogsusu  2Lee, Y. N. 1997. Flora of Korea.
Annotations
Other Links
Storage Information Form
Link to MaizeGDB Stock Information
Actions
Pathogens
Vouchers
Citations
  • Flint-Garcia, S. A., A. Thuillet, J. Yu, G. Pressoir, S. M. Romero, S. E. Mitchell, J. Doebley, S. Kresovich, M. M. Goodman, & E. S. Buckler. 2005. Maize association population: a high-resolution platform for quantitative trait locus dissection. Plant J. 44(6)1054-1064. DOI: 10.1111/j.1365-313X.2005.02591.x. Number of accessions cited: 307
  • Hansey, C. N., J. M. Johnson, R. S. Sekhon, S. M. Kaeppler, & N. de Leon. 2011. Genetic Diversity of a Maize Association Population with Restricted Phenology. Crop Sci. (Madison) 51(2):704-715. DOI: 10.2135/cropsci2010.03.0178. Number of accessions cited: 1351
  • Marand, A. P., L. Jiang, F. Gomez-Cano, M. A. A. Minow, X. Zhang, J. P. Mendieta, Z. Luo, S. Bang, H. Yan, C. Meyer, L. Schlegal, F. Johannes & R. J. Schmitz. 2025. The genetic architecture of cell type–specific cis regulation in maize. Science 388(6744):eads6601. DOI: 10.1126/science.ads6601. Number of accessions cited: 172
  • Mural, R. V., G. Sun, M. Grzybowki, M. C. Tross, H. Jin, C. Smith, L. Newton, C. M. Andorf, M. R. Woodhouse, A. M. Thompson, B. Sigmon, & J. C. Schnable. 2022. Association mapping across a multitude of traits collected in diverse environments in maize. GigaScience 11:gia080 DOI: 10.1093/gigascience/giac080. Number of accessions cited: 708
  • Snook, M. E., B. R. Wiseman, N. W. Widstrom & R. L. Wilson. 1994. Chemicals associated with maize resistance to corn earworm and fall armyworm. In: Mihm, J. A., ed., Insect Resistant Maize: Recent Advances and Utilization. Proceedings of an international symposium held at the International Maize and Wheat Improvement Center (CIMMYT), 27 November-3 December, 1994 37-45. Note: The sampling for maisin was on a non-NCRPIS source. Genetically similar inbred seed was donated to the NPGS on most accessions. Number of accessions cited: 498
  • Van Heerwaarden, J., M. B. Hufford, & J. Ross-Ibarra. 2012. Historical genomics of North American maize. Proc. Natl. Acad. Sci. U.S.A. 109(31):12420-12425. DOI: 10.1073/pnas.1209275109. Number of accessions cited: 413
Pedigree
Date released:
1965
Description:
41.2504B/3*B14
Intellectual Property Rights
Crop Science Registration. GP-3, MAIZE. Issued: 01 Jan 1971.
  • Russell, W. A., L. H. Penny, W. D. Guthrie, & F. F. Dicke. 1971. Crop Sci. (Madison) 11(1):140. Note: GP-3

Observations

Phenotype Data

CategoryDescriptorDescriptionValueSample SizeStudyInventoryAvailability
CHEMICALOil PercentageWhole kernel oil concentration corrected to a standard moisture level (dry weight basis). Value is expressed in percent oil. The method of obtaining the value is described in the method record and may be by calibrated NIR or using wet lab procedures.3.4 MAIZE.NIR.DUPONT-PIONEER.2000PI 550440 94ncai01 SD
COMMENTCore SubsetA flag to indicate the accession is part of a core subset. The set is indicated by the method that was used to designate the set.Y - YES, ACCESSION IS PART OF CORE MAIZE.CORE.SUBSET.PVP.REFERENCE.INBREDS Not Available
COMMENTCore SubsetA flag to indicate the accession is part of a core subset. The set is indicated by the method that was used to designate the set.Y - YES, ACCESSION IS PART OF CORE MAIZE.CORE.SUBSET.GOODMAN.DIVERSE.INBREDS Not Available
COMMENTNotes and RemarksObservations made by cooperators or curators while evaluating or regenerating germplasm. Usually these observations are not published and need verification or there are too few observations of this type to promote a separate trait.OBSERVATION-NURSERY_YES MAIZE.OBS.INBRED.DIVERSITY.2010.NCIANYMOPI 550440 94ncai01 SD
DISEASEGoss's WiltPlant Response To Goss's Wilt organism (Clavibacter michiganensis subsp. nebraskensis (Vidaver & Mandel) Davis et al. = Corynebacterium michiganense pv. nebraskense (Schuster et al.) Dye & Kemp ). Disease names include Goss's bacterial wilt and blight (leaf freckles and wilt).7 - (7) Susceptible MAIZE.GOSSS.U_OF_ILLINOIS.2016-2017PI 550440 94ncai01 SD
DISEASENorthern Leaf BlightLeaf response to northern leaf blight organism (Exserhilum turcicum [Pass.] Leonard & Suggs - previous name was Helminthosporium turcicum.5 - Many lesions; abundant sporulation.8MAIZE.NLB.PIONEER.JOHNSTON.2009PI 550440 94ncai01 SD
DISEASEStewarts WiltPlant response to the Stewart's wilt organism (Pantoea stewartii subsp. stewartii (Smith) Mergaert, Verdonck & Kersters) formerly called (Erwinia stewartii (Smith) Dye ). The trait is coded 1-9 with 1 representing the most resistant response and 9 the most susceptible response.5 - (5) Minimal systemic infection as small, linear streaks on non-inoculated leaves.30MAIZE.STEWARTS.U_OF_ILLINOIS.1997PI 550440 92ncei01 SDNot Available
DISEASEStewarts WiltPlant response to the Stewart's wilt organism (Pantoea stewartii subsp. stewartii (Smith) Mergaert, Verdonck & Kersters) formerly called (Erwinia stewartii (Smith) Dye ). The trait is coded 1-9 with 1 representing the most resistant response and 9 the most susceptible response.5 - (5) Minimal systemic infection as small, linear streaks on non-inoculated leaves. MAIZE.STEWARTS.NCRPIS.2000PI 550440 94ncai01 SD
DISEASEGray Leaf SpotLeaf response to gray leaf spot caused by (Cercospora zeae-maydis Tehon & E.Y. Daniels). The trait is coded 1-9 with 1 representing the most resistant response and 9 the most susceptible response.  MAIZE.GRAYLEAF.USDA.NC_STATE.2000PI 550440 94ncai01 SD
DISEASEGray Leaf SpotLeaf response to gray leaf spot caused by (Cercospora zeae-maydis Tehon & E.Y. Daniels). The trait is coded 1-9 with 1 representing the most resistant response and 9 the most susceptible response.  MAIZE.GRAYLEAF.MONSANTO.MONMOUTH_IL.2000PI 550440 94ncai01 SD
DISEASEGray Leaf SpotLeaf response to gray leaf spot caused by (Cercospora zeae-maydis Tehon & E.Y. Daniels). The trait is coded 1-9 with 1 representing the most resistant response and 9 the most susceptible response.5 - (5) Intermediately susceptible. MAIZE.GRAYLEAF.VIRGINIA_TECH.2000PI 550440 94ncai01 SD
DISEASEEyespotLEAF RESPONSE TO EYESPOT ORGANISM (Aureobasidiumzeae (Narita & Hiratsuka) J.M. Dingley = Kabatiella zeae Narita & Hiratsuka)3 - (3) Numerous lesions on leaves below the ear, but no evidence of lesion coalescence.2MAIZE.EYESPOT.ISU.2000PI 550440 94ncai01 SD
DISEASEAntracnose Stalk RotStalk response to the anthracnose stalk rot organsim (Colletotrichum graminicola (Ces.) G.W. Wils. (teleomorph: Glomerella graminicola Politis) Glomerella tucumanensis (Speg.) Arx & E. Muller (anamorph: Glomerella falcatum Went)). The trait is coded 1-9 with 1 representing the most resistant response and 9 the most susceptible response. 8 - (8) (0 = NO SYMPTOMS OBSERVED, 9 = SEVERE DISEASE DEVELOPMENT)17MAIZE.ANTHRACNOSE.PIONEER.WINTERVIL.2000PI 550440 94ncai01 SD
DISEASENorthern Leaf Blight Race OLeaf response to northern leaf blight race O organism (Exserhilum turcicum [Pass.] Leonard & Suggs - previous name was Helminthosporium turcicum.5 - (5) MANY LESIONS; ABUNDANT SPORULATION.2MAIZE.NCLB.ISU.2000PI 550440 94ncai01 SD
INSECTEuropean Corn Borer Gen1RESISTANCE TO THE FIRST GENERATION OF EUROPEAN CORN BORER.3 - (3) Partial Resistance. Several leaves with shot-hole lesions. MAIZE.ECB1.AMES.93PI 550440 92ncei01 SDNot Available
MORPHOLOGYCob ColorCOLOR OF THE COB1 - WHITE (100%)2MAIZE.OBS.INBRED.DIVERSITY.2011.IAPI 550440 94ncai01 SD
PHENOLOGYAES MaturityA maturity rating based on comparisons to checks with a known maturity. Groups are given numerical assignments with low numbers requiring fewer days to maturity.800.00000 MAIZE.DONOR.INITIAL.OBSERVATION Not Available
PHENOLOGYGDU SILKING C LAT40-49Growing degree units (GDU or GDD) from planting to 50% silking in degrees Celsius at latitude 40-49.9052MAIZE.EYESPOT.ISU.2000PI 550440 94ncai01 SD
PHENOLOGYDays to Silk 40-49 latitudeNumber of days from planting to when silks of 50% of observed plants have emerged where the observations are at latitude 40 to 49 degrees.882MAIZE.EYESPOT.ISU.2000PI 550440 94ncai01 SD
PHENOLOGYGDU SILKING F LAT40-49Growing degree units (GDU or GDD) from planting to 50% silking in degrees farenheit. Data is taken at 40 to 49 degrees N or S latitude. This (86,50) system uses the equation ((Tmax+Tmin)/2)-50. Tmax to 86 maximum and Tmin to 50 minimum.16212MAIZE.EYESPOT.ISU.2000PI 550440 94ncai01 SD
PHENOLOGYGDU SILKING F LAT40-49Growing degree units (GDU or GDD) from planting to 50% silking in degrees farenheit. Data is taken at 40 to 49 degrees N or S latitude. This (86,50) system uses the equation ((Tmax+Tmin)/2)-50. Tmax to 86 maximum and Tmin to 50 minimum.164011MAIZE.OBS.INBRED.DIVERSITY.2010.NYPI 550440 94ncai01 SD
PHENOLOGYGDU SILKING F LAT40-49Growing degree units (GDU or GDD) from planting to 50% silking in degrees farenheit. Data is taken at 40 to 49 degrees N or S latitude. This (86,50) system uses the equation ((Tmax+Tmin)/2)-50. Tmax to 86 maximum and Tmin to 50 minimum.165410MAIZE.OBS.INBRED.DIVERSITY.2010.IAPI 550440 94ncai01 SD
PRODUCTION1000 Kernel WeightThe weight of 1000 kernels measured in grams, preferably with the weight adjusted to 10% moisture content.237 MAIZE.INC.AMES.1994PI 550440 94ncai01 SD
STRESSResponse to SulfonylureasResponse to sulfonylurea herbicides which are acetolactate synthase inhibitors. Particular chemical observed is noted in the comment.1 - (1) Tolerant. MAIZE.OBS.NICOSULFURON.LA.1992 Not Available