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001 G81199
003 MX-TxCIM
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020 _a970-648-116-8
040 _aMX-TxCIM
072 0 _aE16
072 0 _aF30
090 _aLook under series title
100 1 _aYi-qin, H.
_uAsian Regional Maize Workshop, 8: New Technologies for the New Millennium
110 0 _aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico)
111 2 _aProceedings of the Asian Regional Maize Workshop
_cBangkok (Thailand)
_d5-8 Aug 2002
245 0 0 _aClassification of heterotic groups among maize germplasm in China using molecular markers
260 _aMexico, DF (Mexico)
_bCIMMYT :
_c2004
300 _ap. 43-49
340 _aPrinted
520 _aClassification of heterotic groups is essential for maize breeding. RFLP has provided a powerful tool to assign maize inbred lines into heterotic groups. In this study, 45 inbred lines that are used widely in China, besides four lines from USA were chosen for RFLP analysis. Fufty-four RFLP core markers covering the 10 chromosomes of maize were used. The total DNA of each sample was digested with EcoR I, BamH I and Hind III. A total of 860 bands were detected among the 45 inbred lines based on RFLP analysis, mapping to 212 loci. A number of allele at each locus ranged from 2 to 9 with an average of 4.06. In total, 45 inbred lines were classified into six heterotic groups according to RFLPs. Three heterotic groups, including Mo 17, B73 and Oh43 respectively, represented the U.S. heterotic groups. Twenty-one inbred lines, most of which were derived from the Chinese local germplasm, were classified into two heterotic groups, indicating that the local germplasm was different from U.S. germplasm at the molecular level, and played an important role in maize hybrid production in China. Two inbred lines from the tropical germplasm were assigned to the same group. These results provided useful information to understand maize heterotic groups and heterotic patterns in China.
546 _aEnglish
591 _a0501|AGRIS 0501|AL-Maize Program
593 _aJuan Carlos Mendieta
595 _aCPC
650 1 0 _aChromosomes
650 1 7 _aCrop yield
_gAGROVOC
_2
_91066
650 1 7 _aGermplasm
_gAGROVOC
_2
_91136
650 1 0 _aHeterotis
650 1 0 _aHybridization
650 1 7 _aInbred lines
_gAGROVOC
_2
_91155
650 1 7 _aMaize
_gAGROVOC
_2
_91173
653 0 _aCIMMYT
650 1 7 _aPlant breeding
_gAGROVOC
_2
_91203
700 1 _aJian-sheng, L.,
_ecoaut.
700 1 _aSrinivasan, G.|Zaidi, P.H.|Prasanna, B.M.|Gonzalez, F.|Lesnick, K.
_eeds.
942 _cPRO
999 _c7440
_d7440