Abstract
Nineteen rice combinations derived from Zhongzhe A and its derived lines, as well as Y Liangyou 1 as the control, were used to study lodging resistance by detecting plant height and some of the traits of culm and panicle that are related to lodging. The results indicated that the lodging resistance of 16 combinations was significantly stronger than that of Y Liangyou 1. Moreover, the lodging resistances of all combinations derived from Zhongzhe 2A, Zhongzhe 3A, Huazhe A and Zhong 1A were significantly higher than that of Y Liangyou 1. Additionally, the traits related to lodging were not identical within different CMS rice lines, and the relationship between plant height and lodging resistance was only significantly (P < 0.01) detected in Zhongzhe 2A. Some traits of the second internode were closely related to lodging in all combinations, which can be used as an effective index in lodging resistance breeding in rice.
Highlights
Oryza sativa L. is one of the most important food crops in the world, and its yield is directly related to the food security of the country
19 rice materials were prepared by Zhongzhe A, and its derived lines were selected
Y Liangyou 1 was used as a control, including for comprehensive plant height [3] [4], for stem-related traits [9] [10] [11] and for several traits related to rice lodging that have been reported and analyzed by predecessors, such as spike type [12] [13]
Summary
Oryza sativa L. is one of the most important food crops in the world, and its yield is directly related to the food security of the country. With the widespread application of super rice, cultivation and cultivation methods such as less tillage, no tillage, transplanting seedlings, and direct seeding; and the excessive application of fertilizer, the lodging phenomenon of rice is becoming increasingly widespread. The lodging of rice causes a decrease in production and affects the qual-. After the lodging of rice during production, photosynthesis will generally decrease by approximately 60% - 80%, and if the lodging is increased by 2%, the yield will be reduced by 1% [1] [2]
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