1Department of Genetics and Plant Breeding, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
2Krishi Vigyan Kendra, Tamil Nadu Agricultural University, Tindivanam, Villupuram-604 002, Tamil Nadu, India
3Professor (PBG) (Retd.),Department of Cotton, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
4Director of Research, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
5Krishi Vigyan Kendra, Tamil Nadu Agricultural University, Vriddhachalam-606 001, Cuddalore, Tamil Nadu, India
6ICAR-CICR, Regional Station, Coimbatore-641 003, Tamil Nadu, India
*E-Mail: kumarmahadevan@redifmail.com
Online published on 17 April, 2023.
The goal of the current study was to assess the possibility of interspecifc hybridization for transfer of jassid-resistant genes from the two wild cotton species Gossypium armourianum (Kearney (2n=2x=26) D2A) and Gossypium gossypoides (Standley (2n=2x= 26) D6) into the genotypes of cultivated Gossypium hirsutum. The study demonstrated that seeds were successfully produced from crosses between G. hirsutum and G. armourianum using the cultivated tetraploid as a female parent. The reciprocal cross did not produce any seed. None of the crosses were successful in combination with G. gossypoides. Most of the boll shedding in reciprocal cross was between 2–6 days after pollination. MCU5 × G. armourianum had the highest germination percentage whereas; CO17× G. armourianum had highest survival percentage of the seedlings. With further backcrosses or chromosome doubling, the segregants can be further utilized for the introgression of diferent relevant traits like sucking pest resistance against leafhopper and whitefy along with resistance to other insect pests.
Wide hybridization, Crossability, Gossypium armourianum, Gossypium hirsutum
