Crop Improvement Division, ICAR-National Rice Research Institute, Cuttack 753006, India.
Department of Biotechnology & Bioinformatics, Yogi Vemana University, Kadapa 516005, Andhra Pradesh, India.
Genomics. 2020 May;112(3):2647-2657. doi: 10.1016/j.ygeno.2020.02.016. Epub 2020 Feb 19.
Rice serves as one of the essential staple food for half of the global human population. However, due to rapid human population growth, there is an increase in food demand across the globe. Thus, to lessen the gap between food demand and supply, there is an urgent requirement for grain yield enhancement in various important cereals crops, including rice. In the present study, the authors attempted to characterize haplotypes and single nucleotide polymorphisms associated with Gn1a for high grain number formation in rice plants. Result obtained reveals that high grain number gene sequences are under balancing selection and four high grain number specific missense SNPs decreases the stability of Gn1a. Earlier studies have also suggested that decreases Gn1a expression causes cytokinin accretion in inflorescence meristems, which in turn led to increase in grain yield. Hence, these four SNPs may be utilized for increasing grain yield in rice plants.
大米是全球一半人口的主要主食之一。然而，由于人口的快速增长，全球粮食需求也在增加。因此，为了缩小粮食需求与供应之间的差距，包括水稻在内的各种重要谷物作物的粮食产量提高迫在眉睫。在本研究中，作者试图描述与 Gn1a 相关的单倍型和单核苷酸多态性，以促进水稻中高粒数的形成。结果表明，高粒数基因序列处于平衡选择之下，四个高粒数特异的错义 SNP 降低了 Gn1a 的稳定性。早期的研究还表明，降低 Gn1a 的表达会导致花序分生组织中细胞分裂素的积累，进而导致粒产量的增加。因此，这四个 SNP 可用于提高水稻的粒产量。
