Within-line Genetic Variation for Quantitative Characters and SSRs in Long-time Maintained Inbreds in Pearl Millet [Pennisetum glaucum (L.) R. Br.]

Gupta, S K and Nepolean, T and Rai, K N and Hash, C T and Bhattacharjee, R and Rathore, A (2012) Within-line Genetic Variation for Quantitative Characters and SSRs in Long-time Maintained Inbreds in Pearl Millet [Pennisetum glaucum (L.) R. Br.]. The European Journal of Plant Science and Biotechnology, 6 (s2). pp. 109-113. ISSN 1752-3842

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Abstract

Six maintainer (B-) and restorer (R-) lines each from ICRISAT’s pearl millet hybrid parental line breeding program were investigated for within-line genetic variation for quantitative characters and simple sequence repeats (SSRs). Thirty two progenies of each inbred line were evaluated under two contrasting seasons and observed for 5 quantitative characters, and for 20 SSRs. Some B- and R- lines had small but significant within-line genetic variation for certain traits. Higher number of significant differences for within-line variation observed among progenies for B-lines (48%) than for R-lines (33%) indicated that ear-to-row procedure of line maintenance was more effective than bulking the phenotypically similar plants, for maintaining the genetic uniformity in inbreds. Amongst B-lines, ‘ICMB 89111’ had the maximum within-line variation for both quantitative characters and SSR markers. Amongst R-lines, ‘IPC 802’ and ‘IPC 909’ had within-line variation for maximum of 4 quantitative characters. Wide range of variability was observed for all the characters in both B- and R- lines, but genotypic coefficient of variation (GCV) was very low. SSRs were able to detect low level of residual heterozygosity in some of the inbreds

Item Type: Article
Divisions: UNSPECIFIED
CRP: UNSPECIFIED
Subjects: Mandate crops > Millets
Others > Genetics and Genomics
Depositing User: Mr Sanat Kumar Behera
Date Deposited: 22 Feb 2013 11:11
Last Modified: 30 Oct 2013 10:47
URI: http://oar.icrisat.org/id/eprint/6630
Official URL: http://www.globalsciencebooks.info/JournalsSup/12E...
Projects: Molecular Diversity in relation to Morphological Diversity and Yield heterosis in sorghum and pearl millet
Funders: ICRISAT-Sehgal Family Foundation
Acknowledgement: UNSPECIFIED
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