| 摘要: |
| ［８４Ｇ6×７９（1Ｂ）８－８］Ｆ1去雄第７ｄ，用ＡＲ77黑麦花粉重复授粉２次，结实８粒，诱导结实率４．４％，孤雌生殖一代获得纯合二倍体５株，纯合二倍体频率为２．７８％；孤雌生殖二代１８－３－１和１８－３－４两个株系的主要农艺性状表现整齐一致，其中１８－３－４植株较矮，抗病性较好，是一个早熟、大穗、大粒高抗条锈病的新品系。１９９３～１９９４年品比试验表明，该品系较小偃６号增产２５．３％，较陕麦２２９增产１８．１％。本文还对黑麦花粉诱导孤雌生殖的机理、诱导结实率和选择效率以及孤雌生殖二代的一致性进行了讨论。 |
| 关键词: 黑麦花粉，小麦育种，诱导频率，孤雌生殖 |
| DOI： |
| 分类号:S512.103.5 |
| 基金项目: |
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| Studies on Wheat Parthenogenesis Induced by Rye Pollen and its Utilization in Breeding |
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Dong Anshu Tao Sbaowu Wang Mingqi Department of Agronomy,Northwestern Agricultural University,Yangling,Shaanxi,712100),Dong Anshu Tao Sbaowu Wang Mingqi Department of Agronomy,Northwestern Agricultural University,Yangling,Shaanxi,712100),Dong Anshu Tao Sbaowu Wang Mingqi Department of Agronomy,Northwestern Agricultural University,Yangling,Shaanxi,712100)
|
| Abstract: |
| Seven days after emasculation,the[84G6×79(1B)8一8]F1 plants were
pollenized twice with pollen of rye AR77.With 8 grains of seeds and 4.4% of induced
seeds,5 homozygous diploid plants were derived from parthenogenesis progenies 2. The
frequency of the homozygous diploid was 2.78%.The two plant lines,18-3-1 and 18-3-4 in pa2,were uniform in main agricultural features.The 18-3-4 plant line is dwarfer and
has better disease resistance ability than the 18-3-1.So it is a new wheat strain with precocity,larger ear,bigger grain and higher resistance to stripe rust.The varietal trial in
1993～1994 indicated that the p 18-3-4 strain yielded 25.3% more of output than Xiaoyan No.6 and 18.1% more than Shaanmai No.229.The mechanism of the parthenogenesis induced by rye pollen,the induced seed-setting percentage and selecting efficiency as
well as the uniformity of parthenogenesis generation 2 were also discussed. |
| Key words: Rye pollen,wheat,inductio,parthenogenesis,breeding |
