CN105613279A

CN105613279A - Method for florescence prediction in hybrid rice seed production

Info

Publication number: CN105613279A
Application number: CN201610152501.0A
Authority: CN
Inventors: 崔必波; 王伟义; 顾闽峰; 李亚芳; 孙扣忠; 吉荣龙; 王军; 钱兵; 费月跃; 彭亚明; 王春云; 耿安红
Original assignee: YANCHENG XINYANG AGRICULTURAL TEST STATION
Current assignee: YANCHENG XINYANG AGRICULTURAL TEST STATION
Priority date: 2016-03-15
Filing date: 2016-03-15
Publication date: 2016-06-01

Abstract

The invention discloses a method for florescence prediction in hybrid rice seed production and belongs to the technical field of hybrid rice seed production. Florescence prediction is a key technique for hybrid rice seed production and is usually achieved with the young ear differentiation peeling and picking method and the remaining leaf primordium number method, the youngest ear capable of being observed with naked eyes when the young ear differentiation peeling and picking method is adopted is differentiated to the end of the second stage, and at the time, if flowering asynchronism of parents occurs and regulation is needed, regulation is conducted to make the young ear of one parent differentiated to the third stage; practices show that florescence regulation should be conducted as early as possible, or else the regulation effect is poor; the remaining leaf primordium number method has the defects that operation is complicated, and the number of blades is highly affected by environment factors. According to the method, the defects of traditional prediction methods are overcome, observation seeds are sown 10-13 days before the normal sowing time for the same group of parents, then the observation seeds are managed normally, and young ear peeling and picking should be conducted in time for florescence prediction when the observation seeds are in the young ear differentiation stage; if flowering asynchronism of observation parents occurs, it indicates that flowering asynchronism will occur too for normal sowing parents, and therefore florescence regulation needs to be conducted on normal sowing parents so as to realize a good effect.

Description

A kind of breeding of hybrid rice prediction of flowering period method

Technical field

The invention belongs to breeding technology for hybrid rice field, it is specifically related to a kind of breeding of hybrid rice prediction of flowering period method.

Background technology

The prostatitis in the world is walked by the China that utilizes of rice heterosis, for the grain security of country has made huge contribution, utilize hybrid vigour, necessarily produce a large amount of hybrid rice seeds, and the reason affecting hybrid rice seeds output height is a lot, quality is planted except parent, outside rice cropping administrative skill measure, this florescence of father and mother meets in good time and breeding of hybrid rice output height is played decisive effect, what affect that the male parent florescence meets is many because have, wherein with environmental factors, florescence impact is particularly important, in recent years because of global warming, the probability that extreme weather occurs gets more and more, breeding of hybrid rice flowering asynchronism phenomenon is caused often to occur, therefore prediction of flowering period technology is breeding of hybrid rice is a very critical technology.

The research of breeding of hybrid rice prediction of flowering period method is maintained the leading position by current China in the whole world, and current domestic breeding of hybrid rice prediction of flowering period method has: prediction procedure is picked up in ear differentiation stripping, remainder leaf number prediction procedure, leaf index prediction in age, parent notable feature prediction procedure occur, utilize statistical study prediction procedure. the minimum ear differentiation adopting the ear differentiation stripping method of picking up to be observed visually was two end of term, if parent's flowering asynchronism and need to regulate, one of generation effect parent ear differentiation is regulated to reach three interim, practice shows that flowering regulation is more early more good, otherwise then regulating effect is not good, regulate before parent does not enter ear differentiation, then regulating effect is ideal, and remainder leaf number method and leaf index prediction in age all also exist actually operating complexity, the actual number of blade of parent is big by such environmental effects, difference is there is between different year, therefore use in actual production and there is certain risk, although there is the prediction of notable feature prediction procedure accurately in parent, but it is only suitable for the parent that some has notable feature, utilize statistical study prediction procedure, a statistical study formula is successfully established, the time of 3��5 years is needed in certain area, different areas because of weather condition different from edaphic condition, need again to set up, thus the regional compare that can operate is little.

The object of the invention is many deficiencies such as the predicted time for the existence of above-mentioned breeding of hybrid rice prediction of flowering period technology is excessively slow, complicated operation, big by such environmental effects, utilization affects, operable area is little by parent's specialized character, provide a kind of brand-new breeding of hybrid rice prediction of flowering period technology, to overcome in prior art the defect existed, for the lifting of the development and output that promote breeding of hybrid rice industry provides technical support.

Summary of the invention

Technical scheme provided by the invention is as follows:

(1) parent of same combination is broadcast observation kind for 10��13 days more normal sowing time in advance, this both can guarantee to observe kind of ear differentiation and enter for two beginnings in the end of term three, the parent of normal sowing does not also enter the ear differentiation stage, reduce as far as possible again simultaneously normal sowing parent because broadcast the phase and postpone and and the warm equation of light produced is different, and affect the accuracy normally broadcasting phase prediction of flowering period.

(2) determining to observe kind of sown area with normal parents sown area optimal proportions is 1: 2000, for many years facts have proved that such ratio both ensure that the representativeness observing kind, again reduce this Technology application cost.

(3) observation parent is carried out normal field management and leaf record in age, the field management noting observing parent is because of consistent with the normal parent's control measures sowed, comprise the rich water quality management in rice seedling bed, the description and quantity of fertilization, the number of times of laxative and kind, the number of times and degree etc. with dry field of pouring water all wants consistent.

(4) children's fringe stripping should be carried out in time when observing parent and enter the ear differentiation stage and pick up the prediction florescence, prediction of flowering period ear differentiation, taking two beginnings in the end of term three as best (if observing parent's ear differentiation to carry out prediction of flowering period more than three phases, affect normal sowing parent's flowering regulation effect), if observing parent's flowering asynchronism, imply that normal sowing parent does not also meet at the florescence.

The positive effect of the present invention is: create a kind of brand-new prediction of flowering period method, this method overcome that other Forecasting Methodologies exist predicted time is excessively slow, complicated operation, by such environmental effects greatly, many deficiencies such as utilization affects by parent's specialized character, operable area is little, have simple to operate, wide accommodation, forecasting accuracy are good, it is crucial that just can know whether the florescence meets before parental rice children's fringe does not break up, thus farthest improving flowering regulation effect, this Forecasting Methodology is significant to the raising of breeding of hybrid rice output.

Embodiment

Within 10��13 days, broadcast in advance to observe by more normal for the parent of same combination sowing time and plant, observation kind sown area and normal parents sown area optimal proportions are 1: 2000, observation parent is carried out normal field management and leaf record in age, the field management noting observing parent is because of consistent with the normal parent's control measures sowed, children's fringe stripping should be carried out when observing parent and enter the ear differentiation stage in time and pick up the prediction florescence, prediction of flowering period ear differentiation is taking two beginnings in the end of term three as best (if observing parent's ear differentiation to carry out prediction of flowering period more than three phases, affect normal sowing parent's flowering regulation effect), if observing parent's flowering asynchronism, imply that normal sowing parent does not also meet at the florescence.

Claims

1. a breeding of hybrid rice prediction of flowering period method, its concrete way is following steps:

Step one, parent more normal sowing time of same combination is broadcast in advance for 10��13 days and observes kind, when this both can guarantee that observation kind ear differentiation entered for two beginnings in the end of term three, the normal parent sowed also does not enter the ear differentiation stage, and the warm equation of light that minimizing normal sowing parent produces because broadcasting phase postponement as far as possible again simultaneously is different and affects the normal accuracy sowing parent's prediction of flowering period.

Step 2, determine that observing kind of sown area with normal parents sown area optimal proportions is 1: 2000, for many years facts have proved that such ratio both ensure that the representativeness observed kind, again reduce the cost of this technology of utilization.

Step 3, observation parent is carried out field management record with leaf age, it is noted that the field management observing parent is because of consistent with the parent's control measures normally sowed.

Step 4, when observe parent enter the ear differentiation stage time should carry out in time children fringe stripping pick up prediction the florescence, prediction of flowering period, taking the beginning in ear differentiation two end of term three as best (if observing parent's ear differentiation to carry out prediction of flowering period more than three phases, affect normal sowing parent's flowering regulation effect), if observing parent's flowering asynchronism, imply that normal sowing parent does not also meet at the florescence.