Selection of Gossypium hirsutum genotypes for interspecific introgression from G. arboreum using ovule culture

Erpelding, John E.

doi:10.5897/ajb2014.14216

Cited by 2 publications

(1 citation statement)

References 19 publications

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“…Because of hybridization barriers, transferring resistance genes from G. arboreum to G. hirsutum requires specialized breeding approaches such as bridging lines or ovule culture (Gill & Bajaj, 1987;). Genetic characterization of R. reniformis resistant G. arboreum accessions is thus necessary as the successful recovery of healthy hybrid plants from these wide hybridizations is often low (Altman, 1988;Erpelding, 2015) and the recovery of lint yield and quality traits associated with G. hirsutum often requires multiple generations of backcrossing.…”

Section: Discussionmentioning

confidence: 99%

Genetic characterization of Gossypium arboreum accession PI 529740 for reniform nematode resistance

Erpelding

Stetina

2019

Plant Breeding

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Breeding for reniform nematode (Rotylenchulus reniformis) resistance is hindered by the lack of resistance in upland cotton (Gossypium hirsutum) cultivars. Resistance has been frequently identified in accessions from the Gossypium arboreum germplasm collection with accession PI 529740 rated as highly resistant. Accession PI 529740 was crossed with the susceptible G. arboreum accession PI 529729 to develop an F2 population for genetic characterization. The population showed quantitative variation suggesting multiple genes conferred the resistant phenotype. Thirteen of the 216 F2 plants showed resistance similar to the resistant parent and these data supported a two recessive gene model. Sixty plants were classified as resistant or moderately resistant, indicating a single recessive gene conferred the moderately resistant phenotype. The classification of 24 F2:3 families for nematode resistance generally supported the classification of the corresponding F2 plants; however, most families were highly variable for infection with no families rated as resistant. This information will aid in the introgression of resistance into upland cotton as larger populations will be required to successfully recover resistance conferred by multiple recessive genes.

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Section: Discussionmentioning

confidence: 99%

Genetic characterization of Gossypium arboreum accession PI 529740 for reniform nematode resistance

Erpelding

Stetina

2019

Plant Breeding

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Genetic characterization of reniform nematode resistance for Gossypium arboreum accession PI 417895

Erpelding¹,

Stetina²

2018

Plant Breeding

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Rotylenchulus reniformis is an important root pathogen of cotton in the south‐eastern United States, and management is hindered by the lack of host‐plant resistance in upland cotton (Gossypium hirsutum). The G. arboreum accession PI 417895 is highly resistant to R. reniformis, and a segregating population of 300 F2 plants was developed for phenotypic characterization of resistance. The population showed quantitative variation for nematode infection. Twenty plants showed no infection and were classified as escapes. Fifty‐four plants were classified as resistant or moderately resistant, whereas, 226 were classified as moderately susceptible or susceptible based on the nematode response of the susceptible parent, indicating resistance is a recessive trait, but these data did not support the single recessive gene model. Alternatively, this model would be supported if the 77 plants with a similar nematode response as observed for PI 417895 were classified as resistant. Twelve plants showed high levels of resistance and these data would support a two recessive gene model. Accession PI 417895 represents a new source of R. reniformis resistance with two major genes conferring resistance. Introgression of multiple resistance genes into G. hirsutum will require the development of larger populations to recover the resistant phenotype.

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Selection of Gossypium hirsutum genotypes for interspecific introgression from G. arboreum using ovule culture

Abstract: Ovule culture is one of the techniques currently used to introgress desirable traits from

Cited by 2 publications

References 19 publications

Genetic characterization of Gossypium arboreum accession PI 529740 for reniform nematode resistance

Genetic characterization of Gossypium arboreum accession PI 529740 for reniform nematode resistance

Genetic characterization of reniform nematode resistance for Gossypium arboreum accession PI 417895

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