The association of self-fruitful rate and rate of pollen stained with 1%I2-KI of F2 of A2 cytoplasmic male sterility(CMS)and A3 CMS in Sorghum was analyzed with F2 populations of three A2CMS cross classifications(A2T×622×Jinliang 5,A2V4×1383-2 and A2V4×Jinliang 5) and three A3CMS cross classifications(A3 299×1174、A3 2457×1174、A3JW×1174).
以高粱3個(gè)A2類型雜交種(A2TX622×?xí)x粱5號(hào)、A2V4×1383-2、A2V4×?xí)x粱5號(hào))和3個(gè)A3類型雜交種(A3299×1174、A32457×1174、A3JW×1174)的F2群體為材料,來進(jìn)行A2?A3類型高粱F2代花粉碘染色率與田間自交結(jié)實(shí)率之間關(guān)系的研究。
sibiricus and their Hybrid F1,F2 were analyzed by using random amplified polymorphic DNA(RAPD)markers.
利用隨機(jī)擴(kuò)增多態(tài)性DNA技術(shù)(RAPD)對(duì)加拿大披堿草和老芒麥及其雜種F1,F2做了比較分析。
The performance of yield characteristics of F2s from different japonica ecotype crosses including northeast China ecotype,north China ecotype and Japan ecotype and the frequency of individuals were analyzed.
在分析鹽粳68與粳亞種中的東北粳、華北粳、日本粳3種生態(tài)型雜種F2產(chǎn)量性狀的表現(xiàn)及不同類型個(gè)體出現(xiàn)頻率的基礎(chǔ)上,初步認(rèn)為與日本粳品種組配的F2群體出現(xiàn)穗數(shù)型個(gè)體頻率較多,與華北粳品種組配的F2群體出現(xiàn)穗重型個(gè)體頻率較多。
This paper reviewed the heterosis performance of cotton,the research and application of insect-resistant hybrid cotton of F_1 and F_2 generation,and it also analyzed its application prospect and the existing problem in its application.
綜述了棉花雜種優(yōu)勢(shì)的表現(xiàn)及抗蟲雜交棉F1,F2代雜種優(yōu)勢(shì)的研究及應(yīng)用,并對(duì)抗蟲雜交棉的應(yīng)用前景及存了問題進(jìn)行了論述。
The effects of four cultivation factors(planting density,N,K and DPS application) on fiber quality of F_1 and F_2 generation of transgenic hybrid cotton were studied by means of quaternary quadratic regression rotational combination design.
采用四元二次回歸旋轉(zhuǎn)組合設(shè)計(jì),對(duì)影響轉(zhuǎn)基因雜交棉F1、F2纖維品質(zhì)的密度、施氮量、施鉀量和縮節(jié)胺施用量進(jìn)行了綜合研究,結(jié)果表明,縮節(jié)胺與密度是影響F1纖維品質(zhì)指標(biāo)的關(guān)鍵因子,而密度是影響F2纖維品質(zhì)指標(biāo)的關(guān)鍵因子。