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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2020, Volume : 8, Issue : 3
First page : (221) Last page : (227)
Article doi: : http://dx.doi.org/10.18782/2582-2845.7563

Studies on the Inheritance of Brown Midrib Trait and Allelic Relationships among BMR Mutants in Sorghum [Sorghum bicolor (L.) Moench]

Subhasini Vangala^1,2 , Jaya Kumar Jaganathan¹, Manohar Rao D.² and Ashok Kumar Are^1*
1International Crops Research Institute for the Semi-Arid Tropics, Hyderabad, India
²Osmania University, Hyderabad, India
*Corresponding Author E-mail: a.ashokkumar@cgiar.org
Received: 4.05.2019  |  Revised: 11.06.2019   |  Accepted: 17.06.2019 

 ABSTRACT

Brown midrib (bmr) mutants of sorghum have reddish brown vascular tissues in their leaves and stem with reduced lignin content that increases the bioconversion efficiency and digestibility. Earlier studies showed that bmr trait in sorghum is caused by single recessive mutation and there are many independent loci responsible for brown pigmentation. In this study, three novel spontaneous bmr mutants viz., IS 23253, IS 21549 and IS 11861 were used to establish the allelic relationship with 10 bmr mutants belonging to three known bmr groups i.e., bmr 2, bmr 6 and bmr 12. Developed 78 F1s from 13 selected parents using half-diallel mating design. Based on the allelism test, IS 23253 and IS 21549 grouped with bmr 6 group. Also, all F2 populations involving IS 11861, IS 23253 and IS 21549 and lines belonging to three known bmr allelic groups, i.e., bmr2, bmr 6 and bmr 12 showed 3:1, 13:3, 49:15, 193:63, 195:61, 189:67, 45:19, 11:5 segregation ratios for normal: brown mid-rib phenotypes indicating that single recessive gene controlling the brown midrib trait.

Keywords: Brown midrib, CAD ,COMT, 4 CL, Sorghum.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Vangala, S., Jaganathan, J.K., Manohar Rao, D., & Are, A.K. (2020). Studies on the Inheritance of Brown Midrib Trait and Allelic Relationships among BMR Mutants in Sorghum [Sorghum bicolor (L.) Moench], Ind. J. Pure App. Biosci. 8(3), 221-227. doi: http://dx.doi.org/10.18782/2582-2845.7563