INHERITANCE OF OKRA LEAF TYPE, GOSSYPOL GLANDS AND TRICHOMES IN COTTON - N. N. Nawab; A. Mehmood; G. Jeelani; M. Farooq; T. N. Khan (Journal of Animal and Plant Sciences, 2014)
Cotton growing in Pakistan is facing a great threat from the insect pest perspective; which have developed resistance in the versatile insect pest population against the high doses of chemical sprays used in the past years. Such a growing resistance in the cotton insect pests against the insecticide/pesticide application needs to be redressed. Insect non-preference traits exist in nature which can reduce the insect pest population by ultimately reducing the high cost being spent on the insecticide/pesticide application. In cotton, the traits like okra leaf type, trichomes and gossypol glands confer significant resistance against some of the major insect pests including the sucking and chewing insect complex. These traits are oligogenically controlled. Inheritance of these traits is simple. Crosses were made among the contrasting traits. The segregating populations along with the parents, F1 and back crosses for each trait under study were subjected to the inheritance studies. Okra leaf type, trichomes and gossypol glands behaved like any incompletely dominant allele. The chi-square well fits to 1:2:1 in the F2.
Keywords: journal article; Okra leaf; trichomes; gossypol glands; inheritance; cotton