Abstract:
Objectives A new hybrid rice variety of high quality, high yield, and blast resistance that produced grains with a long shelf life was bred to help boost the crop production.
Methods A new restorer line derived from Zhenhui 084, Minghui 86, and Duoxi 1 by the conventional multiple crossing, backcrossing, and double crossing was subjected to a multi-point quality evaluation, blast resistance testing, and accelerated storage tests prior to final selection.
Results The restorer line with desirable agronomic characteristics, Fuhui 702, was crossed with a new 3-line sterile line Neixiang 10A to obtain the hybrid Nei-10-You-702, which had all major physiochemical indices met the departmental quality standards of Grade III high-quality rice. It was, subsequently, submitted for testing at the regional trial and the production test at Enshi prefecture in Hubei Province from 2016 to 2017. It showed an average yield of 586.60 kg per 667 m2, which was 3.51% higher than that of the reference Ruiyou 399. Nei-10-You-702 resisted rice blast according to a field observation as well as in an indoor challenge test. The seeds germinated at a rate of 97.33% after 21 d and 73.33% after 28 d of an artificial aging. It was approved by Hubei Provincial Crop Varieties Certification Committee in August 2019 (E Shen Dao 2019040).
Conclusions The grains produced by the high-quality, high-yield, strongly blast-resistant Nei-10-You-702 could be stored for an extended period of time. It was deemed to become a promising new breed for rice production in the province.
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