Authors: Rickie B Turley Reiner H Kloth
Publish Date: 2008/02/24
Volume: 164, Issue: 1, Pages: 123-132
Abstract
Segregating populations were developed to evaluate the inheritance of the fiberless seed phenotype of upland cotton Gossypium hirsutum L line SL171 We report the inheritance of fuzzy fuzzless and fiberless seed from crosses of SL171 with wildtype DP5690 Mexican fuzzless seed UA 33 accession 143 Ballard fuzzless seed accession 243 and MD17 Results from the F1 F2 and F23 progeny derived from the SL171 X DP5690 indicated that the expression of the fiberless phenotype fit a three loci model with one locus being the dominant fuzzless seed allele N 1 The other two loci were tested to verify whether they were allelic to either recessive fuzzless seed alleles n 2 or n 3 Using the segregation ratios of the F2 progeny derived from the 143 X SL171 cross and F2derived F3 families from SL171 X DP5690 with fuzzy seed lacked N 1 it is proposed that SL171 lacks the recessive n 2 allele but contains the n 3 allele in the genotype of SL171 The third locus was previously not characterized and has been designated as fl 1 fiberless therefore the genotype for the fiberless phenotype of SL171 is N 1 N 1 fl 1 fl 1 n 3 n 3 Fiberless lines MD17 X SL171 were crossed to verify similarities in genotypes between line and the genotype model predictability Various combinations of the homozygous and heterozygous expression of N 1 n 2 n 3 and fl 1 allele produced plants with lower lint percentagesWe would like to thank William Nokes Cedric Brown Tony Miller and Dr William Pettigrew for assistance in field preparation and irrigation Shelia Parker for sample preparation Dr Jeffrey Ray for his program to determine chi square values and to Drs Joe Johnson Tom Kilen Jodi Scheffler Kevin Vaughn and Tianzhen Zhang for critically reviewing this manuscript
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