桃杂交种胚培养技术探析

为提高桃杂交种胚的成活率,克服远缘不亲和性,利用组织培养技术研究不同激素配比对杂交胚成活率的影响。结果表明,最适芽萌发培养基为MS+6-BA(0.5 mg/L)+NAA(0.2 mg/L),萌发率达86%;丛生芽诱导最佳增殖培养基为MS+6-BA(0.3 mg/L)+NAA(0.1 mg/L),增殖系数为5.28;最适生根培养基1/2MS+IBA(0.5mg/L)+NAA(0.1 mg/L),生根率为91%。

236株桃杂交F1代果实可溶性糖含量与果形遗传倾向分析

试验对四川省农业科学院园艺研究所创制的236株桃杂交F代可溶性糖含量和果形的遗传倾向进行分析,结果表明项目组配制的10个桃杂交组合果实可溶性糖含量的遗传具有明显的超亲现象,锦绣×胭脂脆这一组合能够获得更多的高糖F代群体。而桃杂交后代的果形遗传分析发现,圆形对椭圆、尖圆和扁圆占遗传优势,且子代果形受双亲影响较大。桃杂交F代果实可溶性糖含量与果形遗传倾向分析有助于筛选骨干亲本和优势杂交组合。

Breeding and Application of Medium-maturing Late Season Indica Hybrid Rice Taoyou Xiangzhan with Good Grain Quality

Taoyou Xiangzhan, derived from the indica CMS line Taonong 1A and Huanghuazhan （a fine quality conventional rice variety）, is a new medium-maturing late season indica hybrid rice combination. It was evaluated as the 2nd class of fine quality rice variety in Hunan Province in 2012. It is characteristic of high-yielding ability, fine grain quality, good plant type, good lodging resistance and fertilizer tolerance, strong tillering ability and good discoloring at the late growth stage. Taoyou Xiangzhan was registered for release to commercial production by Hunan Provincial Crop Variety Appraisal Committee in June, 2015.

Breeding of a New Fine Quality Fragrant Hybrid Rice Combination Taoxiangyoulijing

Taoxiangyoulijing is a new fine quality fragrant hybrid combination bred by matching the fine quality indica sterile line Taoxiang A with the fine quality restorer line R Lijing by Hunan Taohuayuan Agricultural Science and Technology Co.Ltd,Changsha Zhulixiang Agricultural Science and Technology Co.Ltd and Hunan Zhihe Seed Technology Co.,Ltd.The combination is featured with wide adaptability,high yield,strong resistance to rice blast,and GB class 2 high quality.In October 2019,Taoxiangyoulijing was approved by the National Crop Variety Certification Committee and it reached the second class standard of quality score according to the Standard for Fine Quality Rice,Ministry of Agriculture,China.