| 水稻品种广亲和基因等位关系的遗传分析 |
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| 引用本文： | 顾铭洪,游艾青.水稻品种广亲和基因等位关系的遗传分析[J].中国农业科学,1993,26(1):13-21. |
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| 作者姓名： | 顾铭洪 游艾青 |
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| 作者单位： | 江苏农学院，扬州 225001 |
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| 摘 要： | 通过双列杂交研究了8个广亲和水稻品种广亲和基因的等位关系。研究表明：品种Calotoc、Cpslo-17、Ketan Nangka、02428和轮回422之间相互杂交F#-1代的花粉育性和小穗育性均达到正常育性水平。F#-2代分离不明显，推测这些品种间广亲和基因相互等位，品种02428轮回422的广亲和性受S#-5位点的广亲和基因S#+n#-5控制。
广亲和品种Ketan Nangka与Aus373或Dular杂交，F#-1花粉均出现部分不育现象。轮回422与Aus373杂交，F#-1花粉和小穗育性均显著低于正常水平；与Dular杂交的F#-1花粉育性接近正常水平，但小穗育性显著偏低。以上组合F#-2代群体均出现明显的育性分离，可育株与部分不育株的分离符合7∶2的分离比，说明品种Aus373和Dular的广亲和性在遗传上受与S#-5位点不等位基因的控制，表现配子体不育的遗传特点。在品种Aus373和Dular分别与Calotoc、Cpslo-17、02428之间的杂种F#-1育性正常，F#-2代有少数半不育株出现。推测在这些组合中，杂种育性的表达除了受主基因控制以外，还有微效基因参与作用。
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| 关 键 词： | 广亲和性 遗传分析 等位关系 水稻 |
GENETIC ANALYSIS ON ALLELIC RELATIONSHIP OF WIDE COMPATIBILITY GENES AMONG SEVERAL WCV (Oryza sativa L.) |
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| Gu Minghong You Aiqing Pan Xuebiao.GENETIC ANALYSIS ON ALLELIC RELATIONSHIP OF WIDE COMPATIBILITY GENES AMONG SEVERAL WCV (Oryza sativa L.)[J].Scientia Agricultura Sinica,1993,26(1):13-21. |
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| Authors: | Gu Minghong You Aiqing Pan Xuebiao |
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| Abstract: | In order to investigate the allelic relationship of wide compatibility genes, 8 WCVs, ie Calotoc, Ketan Nangka, 68-83, Lunhui 422, Cpslo-17, 02428, Aas 373 and Dular were collected and crossed in diallel mating design. For analysis of genetic constitutions of F_1 gamets, the F_1s of each cross were crossed to tester variety Nanjing 11 (indiea) and Akihikari (japonica). Pollen fertility and spikelet fertility were investigated for F_1 F_2 and TF_1 (F_l of testing crosses) of each cross together with their parents. The main results were obtained as follows: The wide compatibility genes among variety Calotoc, Ketan Nangka, Lunhui422 and 02428 were allelie each other. The fertility of F_1 of the varieties was normal and no significant segregation in fertility was found.On the other hand, partial sterili ty occurred in F_1 of the crosses of vareity Ketan Nangkn and Lunhui 422 either crossed to variety Aus 373 or Dular. Fertility segregation was detected in F_2 generations and the ratio of fertile plants to semisterile plants was close to 7:2. The sterility occurred in those crosses was supposed to be gametophytic sterile and the wide compatibility gene of variety Aus 373 or Dular was non-allelic to S_5 locus, In other words, besides the gene of S_5~n, another major gene was possibly responsible for the compatibility of varieties Aus 373 and Dular.The fertility of F_1 of varieties 02428, Cpslo-17, Calotoc either crossed to Aus 373 or Dular was normal. However fertility segregation could be found in F_2 populations of the crosses in some extent. It is postulated that nonalielic genes of Wide Compatibility are responsible for the sterility in F_2 and the minor genes of varieties 02428, Cpslo-17 and Calotoc with positive effect on increasing fertility plays important role in reducing the fertility segregation of F_2.No sterility was found in the cross of varieties Dular and Aus 373 both in F_1 and F_2 generations, which meant that the compatibility gene between Aus 373 and Dular was allelic each other. |
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| Keywords: | Wide compatibility Genetic analysis Allelic relationship Rice |
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