Identification of Tropical and Temperate Maize Populations Having Favorable Alleles for Yield and Other Phenotypic Traits

Kraja, Aldi T.; Dudley, J. W.

doi:10.2135/cropsci2000.404941x

Cited by 8 publications

(6 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thus, 34 different germplasm sources (15 tropical populations, seven tropical hybrids and 12 temperate accessions) were evaluated. The Ames accession numbers or PI numbers of these germplasm sources are shown in Table 1 of Kraja and Dudley (2000)…”

Section: Methodsmentioning

confidence: 99%

Identification of Tropical and Temperate Maize Populations Having Favorable Alleles for Disease Resistance

2000

Self Cite

View full text Add to dashboard Cite

A possible use of nonelite germplasm is as a source of alleles for disease resistance. Our objective was to determine the value of tropical and temperate maize (Zea mays L.) germplasm accessions as sources of alleles to improve disease resistance of the Corn Belt hybrid FR1064 × LH185. A group of tropical populations and hybrids from the Germplasm Enhancement of Maize Project (GEM) crossed to either Mo17 or B73 (temperate inbreds), was studied. In addition, a group of temperate accessions was evaluated. Reaction to southern corn leaf blight (SCLB) [Bipolaris maydis (Nisikado & Miyake) Shoemaker = Helminthosporium maydis Nisikado & Miyake], northern corn leaf spot (NCLS) [Bipolaris zeicola (G. L. Stout) Shoemaker = Helminthosporium carbonum Ullstrup Races 2 and 3], gray leaf spot (GLS) (Cercospora zeae‐maydis Tehon & E.Y. Daniels), northern corn leaf blight (NCLB) [Exserohilum turcicum (Pass.) K. J. Leonard & E. G. Suggs = Helminthosporium turcicum Pass., Races 1, 1, 2, 23N and three unidentified races] and common rust (Puccinia sorghi Schwein) was studied using Dudley's method for identifying populations with favorable alleles. All accessions had favorable dominant alleles for resistance not present in FR1064 × LH185 for common rust, GLS, and SCLB. Four accessions had a number of favorable alleles for resistance not significantly different from the best accession for all five diseases. Crosses of the accessions containing Mo17 to FR1064 and LH185 were less susceptible to SCLB, NCLB, and rust than crosses of accessions containing B73. At least seven of the best 10 populations were tropical × Mo17 crosses for SCLB, NCLB, and rust when populations were ranked for presence of favorable alleles for resistance not present in either LH185 or FR1064. Net value statistics for tropical × B73 and tropical × Mo17 accessions differed in indicating whether backcrossing or selfing from the F1 is more desirable. Therefore, if tropical populations are crossed to Corn Belt inbreds to increase adaptation, comparisons among tropical populations should only be made when all populations being compared have been crossed to the same Corn Belt inbred.

show abstract

Section: Methodsmentioning

confidence: 99%

Identification of Tropical and Temperate Maize Populations Having Favorable Alleles for Disease Resistance

2000

Self Cite

View full text Add to dashboard Cite

show abstract

“…Numerous studies (Dudley, 1988; Stojšin and Kannenberg, 1995; Dudley et al, 1996; Kraja and Dudley, 2000; Rodríguez et al, 2007) have examined maize populations for their potential to improve grain yield and other traits using Dudley's methodology (Dudley, 1987a). Few examples can be found about the use of Dudley's method for traits related to forage maize.…”

Section: Methodsmentioning

confidence: 99%

Breeding Potential of Elite Maize Landraces to Improve Forage Yield and Quality of Two Heterotic Patterns

et al. 2013

View full text Add to dashboard Cite

C orn silage represents excellent feed with high energy, dry matter yield, and quality for dairy and meat production that can be stored and used when forage production is low to maintain a relatively constant amount of forage along the year. Since the whole plant is harvested, ear and stover contribute to the final forage dry matter yield. Therefore, both components must be considered in a corn silage breeding program. In many temperate maize production regions, the recommended genotypes for silage have tended to be commercial hybrids selected just for grain production that additionally showed high forage yield. Few maize breeding programs develop hybrids specifically bred for silage production as a primary goal.

show abstract

“…Stojsin and Kannenberg (1995) used Dudley’s method to identify several synthetic populations from Canada that could be good sources of favorable alleles conditioning agronomic performance indices such as ear height and grain yield absent in two Canadian hybrids, CG28 × CO265 and CGKX86 × CO265. Kraja and Dudley (2000) also used Dudley’s method to identify several exotic accessions from the GEM project that improved grain yield, ear height, and other phenotypic traits of a commercial hybrid, FR1064 × LH185, which represents the typical Stiff‐Stalk × Lancaster heterotic pattern of the U.S. Corn Belt.…”

mentioning

confidence: 99%

Breeding Potential of Exotic Maize Populations to Improve an Elite Chinese Hybrid

Yong

et al. 2013

Agronomy Journal

View full text Add to dashboard Cite

Introgression of favorable alleles from exotic maize (Zea mays L.) germplasm can broaden the narrow genetic base of available temperate germplasm. Development of maize hybrids for the Yellow and Huai river valleys in the Corn Belt of China has always been hampered by the lack of favorable alleles for improving maize yield and quality. Twenty exotic populations from CIMMYT and the United States were evaluated to identify alleles for improving a widely cultivated hybrid, Zheng 58 × Chang 7‐2, which represents the predominant heterotic group, PA × Sipingtou. Sixty‐three genotypes, comprising 20 populations, two inbred lines (Zheng 58 and Chang 7‐2), a single‐cross hybrid (Zheng 58 × Chang 7‐2), and 40 inbred × population crosses between the parental inbreds and the CIMMYT and U.S. populations were evaluated for grain yield, test weight, and ear height. Several populations from CIMMYT and the United States were identified as potential sources of favorable alleles for traits lacking in the elite hybrid, Zheng 58 × Chang 7‐2, for each trait evaluated. Two exotic populations, Pop 49 and Stay green‐yellow, were the most outstanding because they possessed favorable alleles for several traits that were not present in the target hybrid evaluated. These results demonstrate that the exotic populations evaluated in this study represent sources of useful genetic variability with good potential for improving Chinese elite germplasm.

show abstract

Identification of Tropical and Temperate Maize Populations Having Favorable Alleles for Yield and Other Phenotypic Traits

Cited by 8 publications

References 14 publications

Identification of Tropical and Temperate Maize Populations Having Favorable Alleles for Disease Resistance

Identification of Tropical and Temperate Maize Populations Having Favorable Alleles for Disease Resistance

Breeding Potential of Elite Maize Landraces to Improve Forage Yield and Quality of Two Heterotic Patterns

Breeding Potential of Exotic Maize Populations to Improve an Elite Chinese Hybrid

Contact Info

Product

Resources

About