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Characterization and genetic inheritance of temperature sensitive genetic male sterility in desi cotton Gossypium arboreum



Characterization and genetic inheritance of temperature sensitive genetic male sterility in desi cotton Gossypium arboreum







The two line method of temperature sensitive genetic male sterility (TGMS) is a useful method for production of hybrid seed in crop plants. TGMS 1-1 line has been identified, characterized and stabilized in desi cotton (Gossypium arboreum L.). It was completely male sterile under high minimum temperature of summer months and exhibited complete pollen fertility under low temperature condition. The Critical Sterility Point was determined as 24A C minimum temperature and 40A C maximum temperature with continuous sunshine and Critical Fertility Point was determined as 18A C minimum and 33A C maximum temperature. The inheritance studies revealed that the trait is governed by single recessive gene. The TGMS 1-1 line developed and characterized was found useful for hybrid seed production in May (100% male sterile) when the minimum temperature was above 24A C and for maintenance when sown in the normal kharif by selfing.

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