Genetic Analysis of Virescent Mutants and the Identification of Virescents 12, 13, 14, 15 and 16 17 in Upland Cotton.

Nine virescent mutants of cotton (Gossypium hirsutum L.) were tested for allelism with known virescent mutants and with each other in both greenhouse and field plantings. One mutant was allelic to 1, two were allelic to yg1yg2, and one was allelic to 10. One mutant gave a positive F1 allelic test with 2, but segregation in the F2 established that it was a homoeologue of 2. Of the remaining mutants, three were identified as simply inherited recessive mutants, and one was a duplicate factor recessive residing on the same chromosomes as 3 and 6.