Study on Interspecific Hybridization between Daincha (Sesbania aculeatea) and Related Species
Chitra. S *
Department of Plant Breeding and Genetics, Anbil Dharmalingam Agricultural College and Research Institute, Trichirappalli-620 009, Tamil Nadu, India.
Thirumurugan.T
Department of Plant Breeding and Genetics, Anbil Dharmalingam Agricultural College and Research Institute, Trichirappalli-620 009, Tamil Nadu, India.
Subramanian A
Department of Plant Breeding and Genetics, Anbil Dharmalingam Agricultural College and Research Institute, Trichirappalli-620 009, Tamil Nadu, India.
Jeyaprakash P
Department of Plant Breeding and Genetics, Anbil Dharmalingam Agricultural College and Research Institute, Trichirappalli-620 009, Tamil Nadu, India.
*Author to whom correspondence should be addressed.
Abstract
Wide hybridization can enrich crops' genetic background and diversity by comparing different species and integrating the different parental traits. In the present study, interspecific hybridization was performed between Daincha and two related sesbania species by hand emasculation and crossing technique. A total of 460 hybrids were obtained in the Sesbania aculeata X Sesbania bispinosa cross, but no hybrids were obtained in their reverse cross, indicating the same cross combination has a large difference in the reciprocal crosses and that the hybrid has certain unidirectionality. The hybrids looked more like their Sesbania aculeata parent in stem and leaf characteristics. A total of 570 hybrids were obtained in the cross Sesbania aculeata X Sesbania rostrata, while no hybrids were obtained by reverse cross combination. The hybrid showed intermediate morphological traits when compared to their parents. Developing hybrids and segregating populations are useful genetic resources and provide interspecific hybridization to enlarge the gene pool of Daincha species.
Keywords: Crossability, Sesbania aculaeata, Sesbania bispinosa, Sesbania rostrata