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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 | | |
|---|
| 0 | PI 665638 | 'MD 15 M4' | Gossypium hirsutum L. | Mississippi, United States | COT | | Not Available | 2012 | DEVELOPED | | | | | | Breeding material | Mean, range, and sample variance statistical parameters were used to compare the mutants with their parents. Line charts from 150 random individual plants from the mutant and check variety indicated that there was a shift in means to the right for the mutant for fiber length and strength indicating an improvement of these traits in the mutant. The ranges of the mutant in fiber length, fiber strength, lint percent, and seed index were wider for the mutants. In 2010, significant differences in the sample variances were observed for fiber length, lint percent, micronaire, and seed index for the MD 15 M4 mutants and the check cultivar. Higher variances were accompanied by wider ranges for the mutant as compared to the check parent, MD 15. Overall, chemical mutagenesis appeared to have created new extremes at both the low and high ends for fiber length, fiber strength, lint percent, micronaire, and seed index. Cotton breeders and geneticists can exploit this new variability in their cotton improvement programs. This is relevant in light of the narrow germplasm base currently observed in cotton germ plasm which limits the success of breeding programs. | 1903421 | PI 665638 |