High-yield indica rice seed production and breeding method

Abstract

The invention relates to the technical field of indica rice breeding, and discloses a high-yield indica rice breeding method. The high-yield indica rice breeding method comprises the following steps: determining a safe heading and flowering period, selecting a base, wherein the safe heading and flowering period is from mid-July to mid-to-late August and the selected base is in an area with the altitude of 400m or below, determining a sowing difference period, and starting sowing difference when a female parent is 1-2 days earlier than a male parent. According to the high-yield indica rice seed production and breeding method, star S is planted in Hunan, the star S has a good out-crossing characteristic, the spike shape is large, the star S is slightly arc-shaped during heading and flowering, the full-bloom stage is 3-4 days, the flowering time is early, the full-bloom stage is 9-12 o'clock, the flowering peak is obvious, the noon flowering accounts for 80% or above, the flowering time encounter rate is high, the general combining ability is good, and the ripe stage is suitable. The selected combination has a wide application prospect in a middle-season rice area, and besides, the disease resistance of the star S in Taojiang of Hunan is shown as rice blast level 3, neck blast level 5 and bacterial leaf spot level 5, and diseases and pests can be effectively prevented and treated.

Description

technical field [0001] The invention relates to the technical field of indica rice breeding, in particular to a high-yield indica rice seed production and breeding method. Background technique [0002] Indica rice, a subspecies of cultivated rice, is about 100 cm high, with light green leaves, flag leaves 37.4 cm long, 1.7 cm wide, loose and moderate plant type, 20 cm long spikes, about 120 grains per spike, and a seed setting rate of 80% More than 80% spike rate, average 1,000-grain weight 25.6 grams, long and narrow grains, colorless glumes, short awns, white and bright rice grains, about 70% polished rice rate, 80% brown rice rate, chalky grain rate less than 30% %, the amylose content is 15.42%, the protein content is 8.2%, the lysine content is 30%, the cavity is thick and soft, the taste is ambiguous, and the product is dimpled. [0003] When the existing high-yield indica seed production and breeding methods are cultivated in some areas, the star S fertility transiti...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a high-yielding indica rice seed production and breeding method, which has the advantages of good outcrossing characteristics and larger ear shape, and solves the problems of poor outcrossing characteristics and smaller ear shape