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United States Department of Agriculture

Agricultural Research Service

Research Project: Genetic Enhancement of Cotton by Marker-Assisted and Conventional Breeding, and Introgression of Genes from Exotic Gossypium Species

Location: Genetics and Precision Agriculture Research

Title: Registration of RMPAP-C4, a random-mated primitive race accession cotton germplasm population

Authors
item MCCARTY, JACK
item JENKINS, JOHNIE
item GUTIERREZ, OSMAN
item HAYES, RUSSELL

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: April 4, 2014
Publication Date: N/A

Interpretive Summary: A random mated population involving four cultivars of cotton, and thirty day-neutral primitive accessions, RMPAP-C4, was developed and jointly released by USDA-ARS and the Mississippi Agricultural and Forestry Experiment Station. Five cycles of random-mating followed the crossing of 30 day-neutral primitive accessions to four conventional cultivars ‘Sure-Grow 105’, ‘DP 393’, ‘FM 458’, and ‘ST 474’. Random mating was facilitated by hand emasculation and bulk pollen methodology. The aim of this project was to incorporate alleles from day-neutral primitive accessions into a population useful to cotton breeding programs for trait improvement and genetic diversity. Agronomic traits measured following five cycles of random mating were not different from those of cultivars, except for lint percent which was lower. Small changes occurred for fiber quality traits, except for fiber uniformity which increased following random mating. Morphological trait diversity is also present in this population. This unique population should offer new genetic combinations and genetic diversity that may be useful to Upland cotton breeding programs.

Technical Abstract: A random mated population involving four cultivars of Upland cotton, Gossypium hirsutum L., and thirty day-neutral primitive accessions, RMPAP-C4, was developed and jointly released by USDA-ARS and the Mississippi Agricultural and Forestry Experiment Station in 2014. This population involved five cycles of random-mating following the cross of 30 day-neutral primitive accessions to the conventional cultivars ‘Sure-Grow 105’, ‘DP 393’, ‘FM 458’, and ‘ST 474’. Random mating was facilitated by hand emasculation and bulk pollen methodology. The aim of this project was to incorporate alleles from day-neutral primitive accessions into a population useful to cotton breeding programs for trait improvement and genetic diversity. The mean values for agronomic traits measured following five cycles of random mating were not significantly different from those of cultivars, except for lint percent which was lower. Small non-significant changes occurred for fiber quality traits, except for fiber uniformity which increased following random mating. Morphological trait diversity is also present in this population. This unique population should offer new genetic combinations and genetic diversity that may be useful to Upland cotton breeding programs.

Last Modified: 7/28/2014
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