Method for rapidly evaluating hybrid rice variety in field

Abstract

The invention discloses a method for rapidly evaluating a hybrid rice variety in a field, comprising the following steps: S1, dividing field performance and comprehensive agronomic traits of a hybrid rice variety and a hybrid combination into productivity, growing situation feature, maturing performance and grain shape and phase; setting relative weight of each trait; S2, rating the traits for rice collected from a field, including: S21, selecting a control variety; and S22, with the control variety as a reference, comparing and scoring the collected rice and the control variety, a score for the rice better than the control variety in traits being higher than a medium level and otherwise being lower than the medium level; S3, calculating a comprehensive score according to the set weights and the scores. The field evaluation and breeding for hybrid rice varieties and hybrid combinations is more technical, field screening for variety and hybrid combination breeding is never complex, random or uncontrollable, and the method belongs to a great modification on the breeding of hybrid rice varieties and hybrid combinations and has a promising application prospect.

Description

technical field [0001] The invention belongs to the field of hybrid rice utilization, and in particular relates to a field rapid evaluation method for hybrid rice varieties. Background technique [0002] Although China is world-leading in the selection and utilization of hybrid rice, the selection of traditional hybrid rice varieties and hybrid combinations is a breeding model based on the individual experience of the breeder. Field and indoor screening, especially in the field selection, the breeder completely relies on his own senses to observe and distinguish the selected object again and again, and finally determine the selected object. Measure again (plant height, ear length, grain shape), and weigh (yield, grain weight). This is what breeders often say, "weighing one stalk by one ruler, plus careful identification in the field". [0003] Specific technical defects of the prior art: [0004] 1. The breeding of hybrid rice varieties and hybrid combinations currently i...

AI Technical Summary

Problems solved by technology

[0004] 1. The breeding of hybrid rice varieties and hybrid combinations currently in use in China is carried out based on the subjective will of the breeders. The core is that there are no strict rules for comprehensive traits such as plant growth, appearance, ripeness, ripeness, plant type and leaf type. The evaluation criteria are very random and uncontrollable, and the breeding results and efficiency vary from person to person, and it is often difficult to continue with the work of the breeder.

Due to the strong randomness, the breeding scale is getting larger and larger, and the breeding efficiency cannot be guaranteed

[0005] 2. There is no standardized field evaluation system for the selection and breeding of hybrid rice varieties and hybrid combinations currently in use in China. Even if it is a single trait assessment index, field operations are time-consuming and technically difficult, resulting in breeding difficult to grasp

Therefore, in the actual operation process, the stability and authenticity of plant selection are often not guaranteed.

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