| Sumario: | In the Guatemalan localities of Chimaltenango and Cuyuta (19 and 29 degrees Celsius, resp.), the F2 populations from 6 crosses (ICTA Quetzal x JU 80-11, ICTA Quetzal x San Martin, ICTA Quetzal x Rabia de Gato, JU 80-11 x San Martin, JU 80-11 x Rabia de Gato, and San Martin x Rabia de Gato) were observed under 13 h natural daylength. In Chimaltenango there was no segregation in the crosses ICTA Quetzal x JU 80-11 and San Martin x Rabia de Gato, indicating no major genetic differences in the 2 sets of parents. In the remaining 4 crosses a 2-gene segregation pattern was noted in which earliness was dominant to lateness. In Cuyuta, the crosses JU 80-11 x San Martin and Rabia de Gato x San Martin showed 2 gene segregation patterns, with lateness being dominant. Results indicate that the genetic control of flowering behavior depends on 4 genes. (CIAT)
|
|---|