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Developmant, Identification and Genetic Analysis of a New Thermo-Sensitive Genic Male Sterile Line in Maize

He Jin

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Abstract

【Objective】Clarify fertility conversion mechanism and genetic basis of a new thermo-sensitive genic male sterile (TGMS) line Qiong68ms. 【Method】The ecology mechanism, cytology characters as well as genetics of the new TGMS line were analyzed in this report. 【Result】Results showed that the TGMS line Qiong68ms expressed complete sterility when the daily maximum temperature was over 33℃ during spikelet phase of head differentiation, and exhibited fertility when the daily maximum temperature was lower than 30℃ during that phase. Its sterility was controlled by a recessive genic gene. 【Conclusion】The fertility of TGMS line Qiong68ms was mainly controlled by daily maximum temperature, which is fully expressed at high temperature condition, could be used as basic material for maize “two-line” hybrid seed production in the future.

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【Objective】Clarify fertility conversion mechanism and genetic basis of a new thermo-sensitive genic male sterile (TGMS) line Qiong68ms. 【Method】The ecology mechanism, cytology characters as well as genetics of the new TGMS line were analyzed in this report. 【Result】Results showed that the TGMS line Qiong68ms expressed complete sterility when the daily maximum temperature was over 33℃ during spikelet phase of head differentiation, and exhibited fertility when the daily maximum temperature was lower than 30℃ during that phase. Its sterility was controlled by a recessive genic gene. 【Conclusion】The fertility of TGMS line Qiong68ms was mainly controlled by daily maximum temperature, which is fully expressed at high temperature condition, could be used as basic material for maize “two-line” hybrid seed production in the future.

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Available abstract

【Objective】Clarify fertility conversion mechanism and genetic basis of a new thermo-sensitive genic male sterile (TGMS) line Qiong68ms. 【Method】The ecology mechanism, cytology characters as well as genetics of the new TGMS line were analyzed in this report. 【Result】Results showed that the TGMS line Qiong68ms expressed complete sterility when the daily maximum temperature was over 33℃ during spikelet phase of head differentiation, and exhibited fertility when the daily maximum temperature was lower than 30℃ during that phase. Its sterility was controlled by a recessive genic gene. 【Conclusion】The fertility of TGMS line Qiong68ms was mainly controlled by daily maximum temperature, which is fully expressed at high temperature condition, could be used as basic material for maize “two-line” hybrid seed production in the future.

Key concepts: Sterility, Biology, Fertility, Genetics, Gene, Line (geometry), Botany, Horticulture

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Developmant, Identification and Genetic Analysis of a New Thermo-Sensitive Genic Male Sterile Line in Maize — Research Paper | ScholarLens