Cherry J. Xuan

1 Rui'an Cunzong Agricultural Machinery Professional Cooperative, Rui’an, 325208, Zhejiang, China
2 Zhejiang Agronomist College, Hangzhou, 310021, Zhejiang, China
Author    Correspondence author
Molecular Plant Breeding, 2025, Vol. 16, No. 2   
Received: 22 Feb., 2025    Accepted: 31 Mar., 2025    Published: 31 Mar., 2025

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

This study selected four common late-season double-cropping rice varieties in Rui’an City (Teyou 1332, Huazheyou 261, Yongyou 1540, and Teyou 217) and focused on analyzing their yield components, panicle grain structure, and growth period. The results showed significant differences in yield among these four varieties. Teyou 217 had the highest yield (550.8 kg/mu), primarily due to its high number of effective panicles (248,500 panicles/mu). In contrast, Yongyou 1540 had the lowest yield (480.0 kg/mu), despite having the highest number of grains per panicle (207.3 grains/panicle), as its effective panicle number was the lowest (159,100 panicles/mu), which became the key limiting factor for its yield. Regarding the growth period, the varieties ranged from 120 to 136 days. Yongyou 1540 had the shortest growth period (120 days), reaching maturity the fastest, making it suitable for early-maturing cultivation. Meanwhile, Teyou 217 had the longest growth period (136 days), allowing for extended growth and increased dry matter accumulation. Overall, increasing the number of effective panicles is the key to achieving stable and high yields in late-season double-cropping rice. Additionally, when selecting varieties, factors such as growth period, disease resistance, rice quality, and field adaptability should be considered to identify the most suitable varieties for local cultivation conditions.

Rui’an City; Late-season double-cropping rice; Yield components; Panicle grain structure; Growth period