Inheritance of microspore embryogenic ability in Brassica crops |
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Authors: | F L Zhang Y Takahata |
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Institution: | (1) Faculty of Agriculture, Iwate University, Morioka, 020-8550, Japan e-mail: ytakahata@iwate-u.ac.jp Tel.: 81-19-621-6151, Fax: 81-19-621-6177, Present address: F.L. Zhang, Beijing Vegetable Research Center, Beijing 100089, China, JP |
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Abstract: | Inheritance of microspore embryogenic ability in oilseed rape (Brassica
napus L.) and Chinese cabbage (Brassica campestris L. ssp. pekinensis) was examined by 4 × 4 diallel crosses using cultivars showing a different response. In both species, embryo yields of most F1 hybrids were similar to, or over, the high responsive parent and some F1s showed intermediate embryo yields between their parents. Diallel analysis showed that both additive and dominant effects
were significant at the 1% level for the genetic control of microspore embryogenic ability in both species. Dominant genes
had positive effects on microspore embryogenesis. In oilseed rape, the additive effects were important, while in Chinese cabbage
the dominant effects were largely contributed. The broad- and narrow-sense heritabilities were 0.972 and 0.811 in oilseed
rape, and 0.959 and 0.659 in Chinese cabbage, respectively. From the results of the segregation of embryo yields in the F2 population of ’Lisandra’×’Kamikita’, it is considered that the microspore embryogenic ability is controlled by two loci with
additive effects in oilseed rape.
Received: 6 September 2000 / Accepted: 24 November 2000 |
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Keywords: | Diallel analysis Heritability Microspore embryogenesis Oilseed rape (Brassicanapus L ) Chinese cabbage (Brassica campestris L ssp pekinensis) |
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