Table of Content

12 May 1986, Volume 12 Issue 02

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ORIGINAL PAPERS

THE DISCOVERY OF A DOMINANT MALE-STERILE GENE IN MILLET(SETARIA ITALIICA)

Hu Hongkai;Ma Shangyao;Shi Yanhua

Acta Agron Sin. 1986, 12(02):  73-78. 

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In 1978,among descendants of“Australia millet x Tulufan millet”cross some male sterile plants were obtained.Through seven generationsof testcrossing or backcrossing to the recessive was conduc ted,segre-gation of male sterile and male fertile plants in a ratio of 1∶1 was ob-served.when the sterile plants were selfed a segregation of 3 male ste-rile:1 male fertile took place.The fertile plants always breed true.Thesterility discovered for the first time in millet is conditional by a domi-nant male-sterile gene in the nucleus. The gene is of great value in the study of heterosis and conventional breeding of millet as well as the theorectical aspects in plant genetics.

THE EFFECTS OF SUCCESSIVE INBREEDING ON THE EMBRYO DEVELOPMENT OF BRASSICA NAPUS L

Meng Jinling;Liu Houli

Acta Agron Sin. 1986, 12(02):  79-86. 

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The effects of successive inbreeding progenies of Brassica napus L.on the embryo development were studied in comparison with the open-pollinated population and hybrids from inbred lines.5 days after polli-nation,the embryo and endosperm development in self-pollinat ed pro-genies began to fall behind crosspollinated treatment,causing smallerseeds and lower oil content in the self-pollinated ones.In contrast withopen-pollinated ones,there was a delayed growth of pollen tube,a laterfertilization,fewer free-nuc...

A STUDY ON ESTERASE ISOZYMES IN THE WILD RICE OF GUANGXI

Wu Miaoshen;Chen Chengbin

Acta Agron Sin. 1986, 12(02):  87-94. 

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Eight hundred and forty-eight samples of dry seed embryoes of Oryzasativa L.f.spontanea Roschev.,Oryza officinalis Wall et Watt and Oryza sativa L.(native species)collected from various parts of Guang-xi were analysed with polyacrylamide gel electrophoresis method.41zymogram types of esterase isozyme patterns were obtained.The resultsobtained were as follows:1.Of the three rice species analysed in this work,found two enzymebands 1A and 7A.Both O.sativa L.f.spontanea and O.sativa L.showed three enzyme bands 1...

STUDIES ON NITRATE REDUCTASE——Ⅶ.NITRATE REDUCTASE ACTIVITY IN DIFFERENT COTTON CULTIVARS

Li Wencai;Lin Zhenwu;Tang Yuwei

Acta Agron Sin. 1986, 12(02):  95-100. 

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The method of in vitro analysis of NR assay was modified as follows:1)The tissue was first homogenated into powder form in solid CO₂ anddissolved in extract buffer.2)The homogenate was then centrifugated at4000 rpm/min for 15 min to precipitate the NR fraction.This methodhas the advantage of protecting NR from inhibitory compounds like phenolsand others,it also makes a lower background by discarding the suppersolution containing pigment after centrifugation.As a result,the NRactivity extracted by this meth...

STUDIES ON THE INFLUENCE OF THE APPLICATION OF FERTILIZERS AT DIFFERENT GROWTH STAGES ON THE NITROGEN ABSORPTION AND ORGAN FORMATION OF WINTER WHEAT

Chen Youliang;Zhang Qigang;Liang Zhenxing;Wang Fujun;Mei Nan

Acta Agron Sin. 1986, 12(02):  101-108. 

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Using ¹⁵N labelled fertilizers,the influence of the application atdifferent growth stages on the nitrogen absorption,organ formation andyield of winter wheat was studied in the Beijing district in the years of1979 through 1981.The fertilizers applied included ammonium sulphate,600 kg per hectare,and urea in an equivalent amount of nitrogen.Eitherone or the other fertilizer was applied only once for each treatment,butat different growth stages,including an application before sowing.The results indicated t...

STUDIES ON THE PRODUCTIVITY OF SINGLE AND DOUBLE CROPPING IN HUANG-HUAI-HAI PLAIN

Han Xiangling;Liu Xunhao;Kong Yangzhong

Acta Agron Sin. 1986, 12(02):  109-116. 

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Studies on the productivity of single and double cropping were madeduring the period from 1980 to 1984 on both irrigated and rainfed fieldsin three places of Huang-Huai-Hai plain.The results obtained are asfollows.On irrigated fields of Huang-Huai-Hai Plain and on rainfed areasin the southern part of this plain where rainfall is abundant,the prod-uctivity of double cropping almost doubled that of single cropping,andthe economical income,energy’s efficiency increased remarkably as well.The removal of nutrien...

THE SINGLE KERNEL EVALUATION TECHNIQUES FOR THE HIGH-LYSINE CORN(Ⅰ)——FOLIN PHENOL COLORIMETRIC METHOD

Wang Yudong

Acta Agron Sin. 1986, 12(02):  117-120. 

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In the breeding work to improve the characters of“Opaque-2”cornendosperm,it is necessary to analyze the hybrid progeny in order topick out the kernels of hard endosperm which contains high lysine.Thezein content of normal corns is about twice as much as high-lysine corn.The difference of zein content among the kernels can be distinguishedaccurately with the sensitive colorimetric method of Folin-phenol.Sothe high-lysine kernels can be picked out.

STUDIES ON THE RELATIONSHIP BETWEEN THE CHARACTERISTICS OF THE DRY MATTER PRODUCTION AND YIELD POTENTIAL IN THE LARGE-PANICLE TYPE RICE

Qi Chanhan;He Haohau;Shi Qinghau;Zeng Xianjiang

Acta Agron Sin. 1986, 12(02):  121-128. 

Abstract ( 1478 )   PDF (444KB) ( 780 )   Save

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This paper attempts to analysis the material fundation of dry matterproduction in the large-panicle type rice dy applying the cultural methodof the hybrid rice:the difference in the yield potential among the large-panicle type rices;the correlation between the yield and the dry matterproduction and

THE CHROMOSOME AND ISOZYME ANALYSIS OF AEGILOPS SQUARROSA

Li Guozheng;Wang Feng;Li Guofeng

Acta Agron Sin. 1986, 12(02):  129-132. 

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The karyotype and C-banding analysis of Ae.squarrosa was carriedout by framedrying slides of smear method and differential stain withGiemsa technique.The genome of Ae.squarrosa possesses seven pairs ofchromosomes,i.e.5 metacentric,1 submetacentric and 1 satellitedchromosomes.Except No.1 chromosome,all chromosomes showed cen-tromere bands.However,some of them appeared fainter intercalaryand telomere bands which varied greatly.Peroxidases and esterase iso-zymes of Ae.squarrosa were detected by polyacrylamide ...

EFFECT OF PEG TREATMENT ON THE VIGOR OF SOYBEAN SEEDS

Fu Jiarui;Cai Dongyan

Acta Agron Sin. 1986, 12(02):  133-138. 

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The aim of this investigation was to examine the effect of osmocon-ditioning on soybean seeds.By using 30% PEG 6000 to soak the seedsfor 2 days at 17℃,the germination rate and vigor index of seeds wereincreased when they germinated at lower temperature(11℃)or highertemperature(32-35℃)or ordinary temperature(17℃)or soaked with 0.1-0.2M NaCl solution.Under the stress conditions,the effect of osmotictreatment might be much obvious than that in optimal condition.Whensoybean seeds were planted early in moist and...

RESEARCH NOTES

PRELIMINARY REPORT ON APPRAISAL OF COLD TOLERANCE AT FLOWERING STAGE OF LATE RICE IN THE NORTH-WEST HUNAN

Li Tamo;Yu Xinming;Wang Hongchum

Acta Agron Sin. 1986, 12(02):  139-142. 

Abstract ( 1589 )   PDF (291KB) ( 768 )   Save

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THE HYDROCYAMIC ACID POTENTIAL(HCN)MEASUREMENTS OF MAIN SORGHUM VARIETIES IN CHINA

Liu Jianwei;Wu Xiangrung

Acta Agron Sin. 1986, 12(02):  143-144. 

Abstract ( 1456 )   PDF (189KB) ( 732 )   Save

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