Seed production method for bilinear hybrid rice overslipping flowering time

Abstract

The invention discloses a seed production method for bilinear hybrid rice overslipping the flowering time, which comprises the following steps: a, seed selection: breeding or transferring an indica sterile line, an indica wide line and a restoring line with a flowering time characteristic similar to that of a female parent indica as male parents; b, seed production: arranging the seed production time from the end of August to early September; C, fertilization: applying a boric fertilizer to the male parent in the young panicle stage so as to advance the flowering time; d, dew removal: in the heading and flowering periods of the female parent, removing dew on the female parent by using maranta in every morning of sunny days; e, harvesting: in the rice seedling bed period, removing hybrid plants which have significant differences in leaf sheath, leaf color, plant type, leaf type and the like, and when seeds are maturated, timely harvesting. According to the invention, the flowering time is advanced in a mode of skillfully applying the boric fertilizer and removing dew in the morning, so that the problem of overslipping flowering phase and flowering time in the existing seed production process is solved, and the purpose that the seed production yield is increased because the setting rate of outcrossing is improved due to coincidence of the flowering times of the male parent and the female parent is achieved.

Description

technical field [0001] The invention relates to a hybrid seed production method of two-line rice which does not meet at flowering time. Background technique [0002] The hybrid rice that was popularized in the past is a combination of indica and japonica type. Since the parents of this type of combination are both indica rice, the flowering habits are roughly the same. It is not obvious that there is no contradiction between flowering and flowering during seed production. As long as there is a good seedling frame, the flowering period is good. High yield can be obtained. However, in recent years, indica-japonica subspecies hybrid seed production, because the multi-indica light (warm) male sterile line is used as the female parent, and the japonica or partially japonica-type wide line and restorer line are used as the male parent, although the advantages are obvious, but the flower Occasionally, the phenomenon is easy to occur, which results in a low seed setting rate. Con...

AI Technical Summary

Problems solved by technology

However, in recent years, indica-japonica subspecies hybrid seed production, because the multi-indica light (warm) male sterile line is used as the female parent, and the japonica or partially japonica-type wide line and restorer line are used as the male parent, although the advantages are obvious, but the flower Occurs easily, which leads to low seed setting rate