Allelic relationships and inheritance of brown midrib trait in sorghum

Gupta, S C (1995) Allelic relationships and inheritance of brown midrib trait in sorghum. Journal of Heredity, 86 (1). pp. 72-74. ISSN 0022-1503

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Four naturally occurring brown midrib mutants in sorghum identified in 1989 in germplasm from Malawi and 3 brown midrib lines previously developed at Purdue University, Indiana, USA through induced mutations (bmr-6, bmr-12 and bmr-18) were considered in this study. Allelism tests in these 7 lines revealed that the 4 naturally occurring brown midrib lines were allelic to each other and to bmr-6. These 5 lines were non-allelic to bmr-12 and bmr-18, whereas bmr-12 and bmr-18 were allelic to at least those genes necessary to express the brown midrib trait. Inheritance of the trait in F1 and F2 populations derived from 15 crosses between 9 normal midrib parents and 3 brown midrib lines was then studied. Results revealed that the brown midrib trait is controlled, at least in part, by genes at 2 or more independent loci in the nuclear genome of sorghum. There is a strong possibility that some modifying genes may affect the expression of this trait. In general, 15-45% of plants with brown midrib can be expected in F2 populations segregating for this character

Item Type: Article
Subjects: Mandate crops > Sorghum
Depositing User: Mr B K Murthy
Date Deposited: 09 Jun 2014 04:11
Last Modified: 09 Jun 2014 04:11
Official URL:
Acknowledgement: the author is grateful to Dr. J. D. Axtell of Purdue University and Dr. C.F.B.Chigwe of the Uniersity of Malawi for supplying the seed of brown midrib sorghum lines.
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