Conversion and characterization of cytoplasmic genic male sterile lines in pigeonpea
DOI:
https://doi.org/10.53550/jfl.v21i2.1964Keywords:
Backcross, Cytoplasmic genic male sterility system, HybridAbstract
Ten agronomically superior and good combiner lines (Pusa 33, ICPL 87, GT 100, SKNP 289, SKNP 290, BDN 2, SKNP 88-3, SKNP 9523, T 15-15 and T 21) were selected to broaden the genetic base of newly established cytoplasmic male sterility system in pigeonpea. These lines were crossed with F, sterile plants of a wide cross (Cajanus scarabaeoides x Cajanus cajan) and newly established CGMS line GT 288A. F,sand subsequent generations were tested for sterility status by using 2% acetocarmine test. Sterile plants with small translucent anthers were identified and advanced by backcrossing. Side by side, the pollinating parents were advanced by selfing. Almost all 'A' lines were found identical to 'B' lines in BC, generation. These were characterized and designated as GT 33A, GT 87A, GT 100A, GT 289A, GT 290A, GT 301A, GT 302A, GT 303A, GT 304A and GT 305A with their maintainer 'B' lines. Amongst them, three lines, GT 100A, GT 289A and GT 290A are determinate types, GT 87A semi-determinate type and rest of the lines indeterminate types. GT 100A, GT 301A, GT 302A and GT 304A are white seeded lines. Early maturing lines include GT 33A, GT 87A, GT 100A, GT 289A, GT 290A, GT 302A, GT 303A and GT 305A. These CGMS lines having diverse genetic base can be used for development of commercial pigeonpea hybrids.
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