Abstract
BackgroundRice aleurone layer develops different colours with various chemical tests that may help to develop some rapid tests for identification/grouping of rice varieties. Understanding the colour inheritance pattern could enable to develop chemical clues that may help for genetic purity analysis along with grow-out-test.ResultsIn this study, inheritance pattern of aleurone layer colour was studied in parents, F1 and F2 progenies derived from the crosses IR 36 × Acc. No. 2693 and IR 64 × Acc. No. 2693. The parent IR 36 showed light yellow (NaOH/KOH) and brown (phenol/modified phenol test) colour; whereas, Acc. No. 2693 revealed wine red/dark wine red (NaOH/KOH) and light brown colour/no reaction (phenol/modified phenol test). In contrary, another parent IR 64 exhibited light yellow (KOH/NaOH) and dark brown (phenol, modified phenol) colour. Both the F1 showed an intermediate light wine red colour (NaOH/KOH) and dark brown (phenol and modified phenol) colour, which is dominant over their one of the parents. The colour pattern with standard phenol/modified phenol, NaOH and KOH tests in F2 progenies of both the crosses showed 9:7 (complementary gene interaction) and 11:5 ratios (reciprocal dominance modification of recessive alleles), respectively.ConclusionsOur findings clearly elucidate the colour inheritance pattern in rice that may facilitate to develop rapid chemical tests to identify/ group the varieties for genetic purity analysis.
Highlights
Rice aleurone layer develops different colours with various chemical tests that may help to develop some rapid tests for identification/grouping of rice varieties
The purpose of the present study is to determine the inheritance pattern and segregation of colour formation trait in aleurone layer of rice using parents, F1 and F2 progenies derived from the crosses IR 36 × Acc
Accession number (No) 2693 Studies on colour formation of aleurone layer revealed that IR 36 showed light yellow with NaOH and Potassium hydroxide (KOH) tests, whereas, phenol and modified phenol tests recorded brown colour
Summary
Rice aleurone layer develops different colours with various chemical tests that may help to develop some rapid tests for identification/grouping of rice varieties. Have been extrapolated for identification/characterization of cultivars on the basis of colour pattern in aleurone layer that might developed through enzyme mediated reactions. The colour formation by enzyme system has been reported in pearlmillet (Varier et al 1995), foxtail millet (Pallares et al 2004), sorghum (Thangavel et al 2005), rice (Mor et al 2006; Dileepkumar et al, 2015; Chandu et al 2017) and wheat (Joshi et al 2007), respectively Chemical tests such as FeSO4 (Pallares et al 2004), KOH (Mor et al 2006), phenol and modified phenol tests (Joshi et al 2007; Banerjee and Chandra 1977) etc.
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