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Identification and Preliminary Study of a New Ecological-sensitive Genic Male Sterileline in Maize

Author: SongPengJu
Tutor: HuYanMin;TangJiHua
School: Henan Agricultural University
Course: Crop Genetics and Breeding
Keywords: Maize Ecological -sensitive genic male-sterile line Ecological- mechanism Genetic study
CLC: S513
Type: Master's thesis
Year: 2011
Downloads: 5
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Abstract


The discovery and identification of the ecological male sterile germplasm was vital for the“two-1ine”system seed production.It is urgent to discover new Ecological-sensitive genic male sterile line in maize to avoid the potential risk of leaf spot caused by some varieties of helminthosporium that infect the special sterile cytoplasm in the“three-1ine”systems.In this study, we reported discovery and genetic studies of a new ecological male sterile line, Chunza, which was foundhad different male fertility when sowing in different ecological conditions.The goals of this study were to discover the ecological factors infuncing fertility of Chunza, and to illuminate the molecular mechnisms controling changing of Chunza male fertility.The ecological male sterile line Chunza was planted in Zhengzhou for two years to elucidate its ecological mechanism.The inbred line exhibited complete sterility at all sowing stages in two years in Zhengzhou, yet in Hainan Provence, it was fertile. It belongs to a typical of pollen abortion male sterility line.F1, F2 and BC1 populations were derived from hybridization between Chunza and an elite maize inbred line 87-1.χ~2-test was processed to test the genetic mechnisms of Chunza male fertility. The fertility was governed by a recessive gene, and named egmsl.By means of bulk segregated analysis (BSA) and SSR markers, the gene was mapped to maize chromosome 2. S30 and s32 were the linkage SSR markers, with the physical distances of 21.3 Mb.

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CLC: > Agricultural Sciences > Crop > Cereal crops > Corn ( maize )
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