Genetic Studies on Triticum timopheevi Based Cytoplasmic Genetic Male Sterility (CGMS) System in Relation to Hybrid Seed Production in Wheat (T. aestivum L.).

Authors : Sudhir Kumar SETHI, Krishnendu GUIN, Rajesh Kumar ARYA

Pages : 103-110

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Publication Date : 2019-08-01

Article Type : Research Paper

Abstract :Forty-five F 1  hybrids were produced by crossing fifteen elite wheat cultivars used as pollen donor/ male parents with three  T. timopheevi  based male sterile lines used as female parents. Self-fertility status of these F 1  hybrids was studied. Two indexes, viz., number and percentage of seed development in bagged spikes of these forty-five F 1  hybrids, bagged before starting of anthesis, were used to determine the degree of fertility restored in the F 1  hybrids. Based upon a scale devised using the second index, i.e. percentage of seed development in bagged spikes, corresponding pollen parents were identified and classified as maintainer, partial maintainer, partial restorer or restorer. In the present study, WH 542 and KRL 99 were identified as partial restorers for CMS line WH 416A. Agronomic performances of the forty-five hybrids produced were also studied for days to heading, plant height, number of tillers per plant, number of florets per spike. F 1  cross-combinations, WH 416A X CBW 38, WH 416A X DBW 39, WH 416A X DBW 50 and WH 416A X NIAW 1188 were found remarkable for their agronomic performance.
Keywords : CMS, hybrid seed production, Triticum timopheevi, fertility restoration