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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
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| 0 | PI 665950 | 'RMBUP-C4' | Gossypium hirsutum L. | Mississippi, United States | COT | | Not Available | 2012 | DEVELOPED | | | | | | Breeding material | When the euploid parental chromosome substitution lines (CS-B) were crossed with 5 diverse cultivars, 15 CS-B lines showed favorable additive effects that were greater than the corresponding chromosome or arm from TM-1 as follows: lint yield (2), boll weight (3), lint percentage (5), fiber strength (7), fiber length (7), micronaire (3), fiber uniformity (3) fiber elongation (5). After C3 (4 cycles) of random mating the mean agronomic and fiber properties of the S1 bulk are different than the mean of CS-B or mean of cultivar parents. Lint yield, fiber strength, micronaire, and elongation are closer to the mean of cultivar parents. Seed index is closer to mean of CS-B parents. Lint percentage and boll weight are near the mean of CS-B and cuHivar parents. Fiber UHM length is greater than the mean of either group of parents. Correlations among traits were changed and many correlations in C4 S1 are not Significantly different than zero. Agronomic and fiber properties and linkage relationships among alleles are different in this population. Data for the fifth cycle S1 are not available; however, we do not expect these mean values will vary much from the fourth cycle of random mating. One should be able to extract individual lines with agronomic and fiber properties superior to the mean of the segregating generation. Theoretically this population should have many introgressed alleles from G. barbadense. No reports in the literature of these CS-B lines being used in crosses with cultivars followed by the development of a random mated population were found. Thus, the random mated population, RMBU P-C4S 1 , is unique and should have great genetic and breeding value to the cotton industry. It is suggested that this introgressed population can be used for direct plant-to-row selections or that one boll or lock could be bulk harvested from each plant and planted and individual plant selections made in the S2 or later generations. | 1904855 | PI 665950 |