通过精英预育种线增强作物弹性,具有干燥直接种子大米的关键特征
Pronob J Paul1,2, Suyash B Patil1,2, Abhilash K Vipparla1,2
1International Rice Research Institute (IRRI), Los Banos, Philippines.
The plant genome
|October 8, 2025
概括
基因组辅助育种开发了用于干直接播种 (DDSR) 的新米品种,提高了水效率和产量. 这些先进的线路在DDSR和移植条件下都表现出强的表现,其中一些接近释放.
科学领域:
- 植物育种和遗传学 植物育种和遗传学
- 农业学是一种农业学.
- 农业科学 农业科学
背景情况:
- 干燥直接种子大米 (DDSR) 与移植水泡大米 (TPR) 相比,具有优势,包括提高用水效率,机械化和减少温室气体排放.
- 适合DDSR品种的有限可用性需要有针对性的育种计划.
- 基因组辅助育种加速了具有理想特征的作物品种的发展.
研究的目的:
- 通过基因组辅助育种计划开发适合DDSR的米品种.
- 将19个DDSR和生物压力相关的基因/定量特征位点 (QTLs) 结合到精英遗传背景中.
- 在DDSR和TPR条件下验证开发的内进线 (IL) 的性能和特征.
主要方法:
- 一个育种计划结合了19个与无氧发芽,涌现,活力,根特征,顶峰强度,宿舍抵抗,谷物产量和生物压力 (中,爆炸,棕色植物) 相关的目标基因/QTLs.
- 在MTU 1010和IR91648-B-89-B遗传背景中使用了11个捐赠父母,创建了150多条内进线 (IL).
- 用1k-RiCA SNP阵列进行基因型化,随后在DDSR和TPR条件下进行两年的现场评估,并对内进性特征进行基因型/表型验证.
主要成果:
- 48个IL成功携带7-15个向基因/QTL,并确定了额外的非向基因/QTL.
- 在DDSR和TPR条件下,ILs的收益性能之间观察到正相关性.
- 排名前10位的IL产量平均为5756公斤/公 (DDSR) 和5665公斤/公 (TPR);四个IL被提名用于品种释放,其中两个处于先进阶段.
结论:
- 基因组辅助育种计划有效地开发了具有增强DDSR适应性和可取的农业学和生物压力耐受性特征的内进线.
- 开发的IL显示出在DDSR和TPR系统下广泛的适应性和高收益潜力.
- 这些IL作为未来开发优质DDSR品种的宝贵预育种资源.
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