Method for breeding three-line rice strong restoring line H570
A technology of strong restorer and restorer lines, applied in the direction of botany equipment and methods, application, plant genetic improvement, etc., can solve the problem that the plant type does not change much, so as to increase the cut-off area, increase the net photosynthetic rate, improve The effect of light utilization
Pending Publication Date: 2016-07-13
CHINA NAT RICE RES INST
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The invention discloses a method for breeding a three-line rice strong restoring line H570. The method comprises the steps of taking an inbred line of a hybrid generation F4 of 422 turns of hybridizing of a javanica rice material WL1312 and a japonica type wide compatible material as a female parent; the female parent is hybridized with a strong restoring line Minghui63 which is popularized and applied in a large area in production; a wide compatible strong restoring line DI508 is successfully bred through system selection of a plurality of years and generations and resistance evaluation of different ecological regions; DI508 dried seeds are subjected to radiation and mutagenesis, and a traditional breeding concept that seed breeders usually select early ripe single plants from variation groups for a long period is changed. Ultra-compatible and late-ripe varied single plants are selected from the variation groups HK2 of radiation and mutagenesis generations of the DI508, and are directionally selected in Hainan and Zhejiang, so that the restoring line H570 is finally bred. The H570 is strong in restoring capability, good in matching ability, excellent in agronomic characters, and high in post-period functional leaf photosynthetic efficiency.
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