Abstract:
An axillary branched somaclonal mutant (SbABM) in sorghum derived from Annigeri-1 was reported which exhibits branching from every node of the plant. This is the first axillary branched mutant reported in grain sorghum with desirable phenotype and stability of expression of axillary branching over generations. However, this trait was expressed at different levels of intensity (variation for number of axillary branches per plant) within the progenies of a single true breeding plant. The mutant plants selected based on different number of axillary branches were evaluated in plant to progeny rows for two years and the study revealed stable penetrance of more than 85 % and variable expressivity for the character. The axillary branched mutant was found to have important architectural features like medium plant height, increased number of panicles per plant, increased seed size, increased grain and fodder yield, lodging resistance and stay green nature. Therefore, understanding the nature of inheritance of axillary branching will help for the genetic modification of plant architecture for improved yield and fodder qualities. The mutant line, SbABM was crossed with five normal sorghum cultivars both as a male and female parent, to elucidate the effect of cytoplasm on axillary branching if any. All the ten F2 populations showed the same segregation ratio of three mutant to one normal type phenotype based on Chi square test. The results revealed that axillary branching is controlled by a single dominant nuclear gene.
Similar content being viewed by others
References
Beveridge CA (2006) Axillary bud outgrowth: sending a message. Curr Opin Plant Biol 9:35–40
Doust AN (2007) Architectural evolution and its implications for domestication in grasses. Ann Bot 100:941–950
Jakkula LR, Knauft DA, Gorbet DW (1997) Inheritance of a shriveled seed trait in peanut. J Hered 88(1):47–51
Kawakami N, Miyake Yoshiko, Noda Kazuhiko (1997) ABA insensitivity and low ABA levels during seed development of non-dormant wheat mutants. J Expt Bot 48(312):1415–1421
Kebrom TH, Burson BL, Finlayson SA (2006) Phytochrome B represses teosinte branched1 expression and induces sorghum axillary bud outgrowth in response to light signals. Plant Physiol 140:1109–1117
Kerstetter RA, Hake S (1997) Shoot meristem formation in vegetative development. Plant Cell 9:1001–1010
Maralappanavar SM, Kuruvinashetti S, Chandrashekhar CH (2000) Regeneration, establishment and evaluation of somaclones in Sorghum bicolor (L.) Moench. Euphytica 115:173–180
McSteen P, Leyser O (2005) Shoot branching. Annu Rev Plant Biol 56:353–374
Napoli CA, Beveridge CA, Snowden KC (1999) Reevaluating concepts of apical dominance and the control of axillary bud outgrowth. Curr Top Dev Biol 44:127–169
Panse VG, Sukhatme PV (1967) Statistical Methods. Oxford and IBM, New Delhi
Schmitz G, Theres K (1999) Genetic control of brnahcing in Arabidopsis and tomato. Curr Opin Plant Biol 2:51–55
Srinivasan S, Gaur PM, Chaturvedi SK, Rao BV (2006) Allelic relationships of genes controlling number of flowers per axis in chickpea. Euphytica 152(3):331–337
Sunohara H, Takayuki K, Sea SS, Yutaka S, Kanna S, Hidemi K (2009) A dominant mutation of Twisted Dwarf 1 encoding an ά-tubulin protein causes severe dwarfism and right helical growth in rice. Genes Genet Syst 84:209–218
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Immadi, S., Patil, S., Maralappanavar, M. et al. Penetrance, expressivity and inheritance of axillary branching in somaclonal mutant of sorghum (Sorghum bicolor L.). Euphytica 196, 449–457 (2014). https://doi.org/10.1007/s10681-013-1046-4
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10681-013-1046-4