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- W4313554913 abstract "Abstract Occurrence of physical dormancy in the form of hard seed coat prevents proper utilisation and conservation of wild species of pigeonpea, which offers a source of many useful traits. Hence, in the present investigation attempt has been made to understand the variability in hardseededness and the pre-treatments to overcome it in 44 accessions comprising of 10 wild pigeonpea species ( Cajanus scarabaeoides, C. crassus , C. platycarpus , C. cajanifolius, C. lineatus , Rynchosia minima , R . bracteata , R rothii, R rufescens and R. aurea ). The level of hardseededness varied from 36–100%, with an average of 76.5%. Likewise, the time to initiate germination (T1), achieve 50% germination (T50) and mean germination time (MGT) varied between 16.18-249.9h, 94.7-607.7h and 37.5-153.2h, respectively. Overall, all the treatments reduced hardseededness and improved germination over the control, with partial incision on seed coat (PSCI) being the best treatment for all the species recording 70–98% germination, except for R. aurea (30%) and C. cajanifolius (59%). The hot water treatment (HWT) for 30 and 60 minutes was the best treatment for C. cajanifolius recording germination of 66–70% as compare to 11% in control. The sulphuric acid scarification (SAT) for 2 m was the best pre-treatment for overcoming dormancy and improving germination in R. bracteata , R. rothii and R. rufescens . The result indicated a significant inter and intra species variation in the effectiveness of pre-treatments in overcoming physical dormancy, suggesting that the optimum pre-treatment for overcoming hardseededness should be standardised for each accession. Also the dormancy breaking pre-treatments not only reduced hardseededness and improved final germination percent but it also reduced time for T1, T50 and MGT, suggesting that use of such pre-treatments before sowing could result into higher, uniform and rapid germination." @default.
- W4313554913 created "2023-01-06" @default.
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- W4313554913 date "2023-01-05" @default.
- W4313554913 modified "2023-09-26" @default.
- W4313554913 title "Overcoming seed coat imposed dormancy in wild species of pigeonpea (Cajanus cajan L. Millsp.)" @default.
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- W4313554913 doi "https://doi.org/10.21203/rs.3.rs-2408280/v1" @default.
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