C. O. Grogan’s scientific contributions

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Publications (9)


Inheritance of Crushing Strength and Rind Thickness in Several Inbred Lines of Corn1
  • Article

March 1963

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2 Reads

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5 Citations

P. J. Loesch

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M. S. Zuber

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C. O. Grogan



Chemical Composition of Kernel Fractions of Corn Samples Varying in Amylose Content1

October 1960

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1 Read

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4 Citations

Synopsis Kernel fractions of corn samples varying in amylose content show that amylose percent is negatively correlated with endosperm weight and percent starch, and positively correlated with pericarp weight, germ weight, endosperm protein, and endosperm oil. The association of other kernel components, such as starch, oil, and protein, is discussed.



Comparative Performance of Various Combinations of F1 and F2 Generation Seed of Maize1

February 1958

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2 Reads

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1 Citation

Synopsis Synopsis The presence of 20% or more of F2 female single cross seed in an original F1 double cross hybrid was necessary to obtain a statistically significant reduction in yield. The vigorous F1 plants partly compensate for the loss effected by the F2 plants. Please view the pdf by using the Full Text (PDF) link under 'View' to the left. Copyright © . .


Breeding High Amylose Corn1

January 1958

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6 Reads

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18 Citations

M. S. Zuber

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C. O. Grogan

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W. L. Deatherage

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[...]

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M. M. MacMasters

Synopsis Synopsis A new strain of high amylose was found to be non-allelic with the previously repotted ha strain. The F3 segregates of a cross between the two strains gave amylose contents ranging from 25.4 to 70.3%. Modifying factors for amylose content apparently exist in some normal dent corn lines. Please view the pdf by using the Full Text (PDF) link under 'View' to the left. Copyright © . .


Studies of the Interrelation of Field Stalk Lodging, Two Stalk Rotting Fungi, and Chemical Composition of Corn1

June 1957

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7 Reads

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16 Citations

Sypnosis Sypnosis Susceptibility to stalk lodging was positively associated with ash, cellulose, potash, and silica but was not associated with susceptibility to Diplodia zeae or Gibberella zeae. Diplodia was negatively associated with ash, crude fiber, lignin, and cellulose but was positively associated with nitrogen. Gibberella was similarly associated except no relation with ash or lignin was found. Please view the pdf by using the Full Text (PDF) link under 'View' to the left. Copyright © . .


A Comparative Study of Top Cross Tester Parents of Maize1

February 1957

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2 Reads

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7 Citations

Synopsis This investigation revealed both the top cross tester parents and the segregating population influenced considerably the measurement of combining ability, but the different tester parents gave about the same relative information on lodging and ear height. The study also indicated that some single crosses were equally as effective as double crosses for measuring general combining ability.

Citations (5)


... In the parental, F 1 , and backcross generations of stalk-lodgingresistant × susceptible crosses, the distributions of crushing strength and rind thickness were skewed toward the resistant parent (Loesch et al., 1963). There was a high correlation between the two traits, and specific combining ability (SCA) was greater than general combining ability (GCA) for both traits. ...

Reference:

Contributions of Dent Corn Germplasm to Stalk and Root Quality in Sweet Corn
Inheritance of Crushing Strength and Rind Thickness in Several Inbred Lines of Corn1
  • Citing Article
  • March 1963

... The described trend promoted greater plant and ear reproductive efficiencies (D'Andrea et al., 2013;Galizia et al., 2020;Vega et al., 2001). Increased biomass partition to the ear during the critical period registered for grain hybrids could be attributed to their comparatively lower ASI, indicative of higher synchrony between the tassel and the apical ear that is conducive to improving the number of kernels per unit area (Chinwuba et al., 1961;Edmeades et al., 2000). The greatest KNP obtained by grain hybrids also supported the increase in PGR EKFP ( Figure 5). ...

Interaction of Detasseling, Sterility, and Spacing on Yields of Maize Hybrids1
  • Citing Article
  • July 1961

... In particular, the lack of affordable, reliable and reproducible methods for measuring stalk lodging resistance in field conditions has been a major obstacle in resolving the genetic architecture of this trait. These impediments have prompted the use of various intermediate phenotypes, including breaking strength, crushing strength, and rind penetrance resistance, as proxies for stalk lodging resistance in genetic studies (Durrell, 1925;Zuber and Grogan, 1961). However, the mechanical tests used to acquire these intermediate phenotypes produce failure types and patterns inconsistent with natural stalk lodging patterns . ...

A New Technique for Measuring Stalk Strength in Corn1
  • Citing Article
  • September 1961

... Previous studies have shown that lodging is a complicated phenomenon, because it is closely related both to the structure and the chemical constituents of the stem (Hondroyianni, Papakosta, Gagianas & Tsatsarelis, 2000;Zuber, Grogan, Michaelson, Gehrke & Monge, 1957). Lignin, which is a major structural component of secondary cell walls in vascular plants, is not only associated with plant growth but also provides the plant body with mechanical strength (Ma, 2009). ...

Studies of the Interrelation of Field Stalk Lodging, Two Stalk Rotting Fungi, and Chemical Composition of Corn1
  • Citing Article
  • June 1957

... Matzinger (1953) reported that a narrow tester's genetic base participate more to line x tester interaction than does a large bases one. On the other hand, Grogan and Zuber (1957) illustrated that some double crosses like single crosses in effective for measuring GCA. El-Hosary (2014) estimated the relative value of various testers and found the small bases teeter like inbred line or single cross is more important in evaluating inbred line than open pollinated population. ...

A Comparative Study of Top Cross Tester Parents of Maize1
  • Citing Article
  • February 1957