Screening method for bentazone sensitive paddy

Abstract

The invention discloses a screening method for bentazone sensitive paddy, which comprises the following steps: sowing paddy seeds; raising seedlings; transplanting; after heading for 15-20 days, spraying a bentazone aqueous solution with mass percent concentration of 0.5%-0.8% to the plants; after 5-10 days, observing the growing condition of the paddy; if the plants are suffered in bentazone poisoned symptom, marking as suspected plants; harvesting seeds on a single suspected plant; taking a part of seeds and sowing; in a seedling stage, spraying the bentazone aqueous solution with mass percent concentration of 0.1%-0.8%; and if the plants are suffered in bentazone lethal symptom after spraying the bentazone aqueous solution, confirming the seeds harvested from the suspected plants as the seeds of the bentazone sensitive paddy. The primary screening for the bentazone sensitive paddy in the seed mature period is the technical core of the screening method provided by the invention. According to the screening method, the seed selection is brought forward for one generation; the sowing area is efficiently reduced; the screening efficiency is greatly increased; the cost is saved; and the screening method is especially suitable for the screening for target plants when the bentazone sensitive paddy is cultivated in a form of mutation breeding or crossbreeding.

Description

technical field [0001] The invention relates to the field of crop cultivation, in particular to a screening method for bendazone-sensitive rice. Background technique [0002] Rice is the grain variety with the largest planting area in China, and has always played a dominant role in my country's grain production and consumption. China is the first country in the world to successfully realize the commercial production of hybrid rice. Since the large-scale promotion and planting of hybrid rice in 1976, the annual planting area of ​​hybrid rice in the country has accounted for more than 50% of the annual planting area of ​​rice. In the past ten years, the photothermosensitive genic male sterile line (T / PGMS) has been successfully utilized, and the two-line hybrid rice has made a breakthrough. So far, many photothermosensitive genic male sterile lines have been identified successively. [0003] The authenticity and purity of hybrid rice varieties are the basis for whether hetero...

AI Technical Summary

Problems solved by technology

[0006] In the process of cultivating bentazon-sensitive rice, due to the need to harvest all M 2 M on plants 2∶3 Seed or all F 2 F on plants 2∶3 Seeds, and planted by line M 3 or F 3 , and the reserved seeds and the sown seeds must correspond one by one, so this technical route causes a lot of screening work, and the cost and time of cultivation are greatly increased

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