Abstract
Identification of homozygous lines is a prerequisite for commercial sugarcane cultivation through true seed, which will bring a transformational change in sugarcane agriculture. In order to explore this possibility, several commercial canes were selfed and the selfs were evaluated for economic traits and molecular similarity. Among the families, Co 1148 family contained advanced generation selfs, while others were of early generations. The families Co 1148, Co 86032, Co 99008 recorded the least variability for cane yield and quality traits, while Co 775 families exhibited the highest variability. On genotyping with eleven sequence tagged microsatellite markers and subjecting the data to STRUCTURE analysis revealed 9, 4, 4 and 2 subpopulations in Co 1148, Co 86032, Co 99008 and Co 775 families, respectively. In each family, clone(s) amplifying least number of markers within each allele and having highest genomic differentiation in relation to the parent are considered as relatively homozygous types. One such identified sixth generation self, viz. 1148-13-11-2-237-2-61 was selfed and crossed with other identified near homozygous lines, and the progenies were compared for their homogeneity. The hybrid progeny populations recorded lower coefficient of variation and exhibited high hybrid vigour over the corresponding selfed progenies. The results implied the scope of hybrid breeding and true seed production in sugarcane through developing homozygous selfs. The identified near homozygous selfs need to be further advanced and investigated for their utilisation as parents in sugarcane true seed production programme.
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Pathy, T.L., Vinu, V., Annadurai, A. et al. Identification of Near Homozygous Inbred Lines for Developing Hybrid Populations to Explore the Possibility of True Seed-Based Sugarcane Cultivation. Sugar Tech 25, 308–319 (2023). https://doi.org/10.1007/s12355-022-01144-0
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DOI: https://doi.org/10.1007/s12355-022-01144-0