| BNS is an ecological male sterile line of wheat,was bred by the Henan Institute of Science and Technology. In order to understand the sterility characteristics of BNS, BNS,Bainongaikang 58(BN58) and Yang-wheat 13(YW13) had been studied from 2006-2009. In trial, all wheats were sowed by stage in Changsha city, Hunan province, for investigating the relationship between growth, development and meteorological factors of BNS, and results showed that:1, As delaying in sowing date, the breeding to jointing stage and entire growth period were gradually shorten, but the performance of shooting to heading and heading to mature stage were the extension of early sowing, late sowing may shorten the birth process. Wheat growth stages were influenced by light, temperature, precipitation and other meteorological factors, its mainly related to days of be≥5℃, sunshine days, accumulated temperature of be≥3℃, and days of be≥10℃on Growing Period. Accumulated temperature of be≥3℃, sunshine duration, the sunny days and the average temperature of be≥10℃were related to stage of breeding to jointing; days of be either≥5℃or≥10℃were related to jointing to heading stage; heading to maturity stage was determined by days of be≥5℃decision; the whole growth period was affected by the accumulated temperature of be≥10℃and≥3℃, sunshine days, and the average temperature of be≥15℃.2, In higth, Wheats were the highest in suitable for sowing, were low either early sowing or late sowing plant become low, and gradually short with the delayed sowing; panicle length, panicle internodes and florets in the late sowing were relatively small. BNS's seed set increased with delayed sowing date; BN58 had poor performance in the early sowing, but proper performance in late sowing, YM13's volatile increasing with the sowing delaying, yield traits performance good in late sowing,1000-grain weight were down either early sowing or lately sowing. In a word, the main agronormic characters of wheat were related to the maximum temperature, precipitation, rainy days, the average temperature of be≥15℃, sunshine hours, accumulated temperature of be≥5℃and the days of be≥10℃.3, BNS's sterile pollen abortion rate is fluctuated between 32.6% and 100%,and with a range of self-seeds rate from 0.0% to 48.6% (National)and 0.0% to 64.0% (International), the fertility variation is from complete sterility to high sterility, semi-sterility, low sterility, and normal fertility. Pollen abortion is mainly typical abortion, changes in the fertility process, the pollen round defeat by a typical abortion→spherical abortion type→dye completely fertility change in the April 1 before flowering, pollen abortion completely, on April 2 to April 5 starts to flower pollen fertility, April 8,9,10 Day is sterile pollen fertility transformation of the critical period, then pollen abortion rate decreased, more fully fertile pollen. Sensitive stage of fertility longer, before and after the booting, flowering before the 9 to 32 days the temperature has an impact on fertility, fertility critical value of around 11℃,12℃higher than the apparent change when the education, pollen fertility return model y=114.65618-0.01472Tj. |
PDF Full Text Request