Mapping, Combining Abilities, Heritabilities and Heterosis with 4x X 2x Crosses in PotatoHalf-tetrad analysis with linked genes in tetraploids. Genetic mapping of three linked genes for tuber shape and eye color in potato. Combining ability variances, heritabilities and heterosis for tuber yields and specific gravity of 4x progeny form 4x x 2x crosses in potato. |
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Page 7
... FDR and SDR modes of 2n gamete formation , the m.d. must be known . It is apparent that it will be easier to distinguish between the FDR and SDR modes for a marker gene close to the centromere , since without crossing - over ...
... FDR and SDR modes of 2n gamete formation , the m.d. must be known . It is apparent that it will be easier to distinguish between the FDR and SDR modes for a marker gene close to the centromere , since without crossing - over ...
Page 10
... ( FDR ) or second division restitution ( SDR ) . In potato , 2x , 2n pollen producer clones have been identified which produce 2n pollen by either FDR ( ps / ps ) or SDR ( pcl / pcl ) . Mok et al . , 1976 , provided direct genetic ...
... ( FDR ) or second division restitution ( SDR ) . In potato , 2x , 2n pollen producer clones have been identified which produce 2n pollen by either FDR ( ps / ps ) or SDR ( pcl / pcl ) . Mok et al . , 1976 , provided direct genetic ...
Page 32
... FDR and SDR , both in CP , are shown in Table 7. When mapping only one gene , the percentage of " parental " gametic types is similar for FDR and SDR when p - 2 / 3 ( 33 mu . from the centromere ) , thus the two mechanisms cannot be ...
... FDR and SDR , both in CP , are shown in Table 7. When mapping only one gene , the percentage of " parental " gametic types is similar for FDR and SDR when p - 2 / 3 ( 33 mu . from the centromere ) , thus the two mechanisms cannot be ...
Contents
TABLE OF CONTENTS | 3 |
LIST OF FIGURES | 6 |
Methods and Assumptions | 10 |
13 other sections not shown
Common terms and phrases
2arcsin 2n gamete formation 2x crosses 2x FDR 2x FDR-CO 4x cultivars 4x parents 4x progeny 4x x 2x addition analysis breeding calculated centromere chromosome clones combining abilities compared correlations crossovers diploid distal locus division dominant double effects estimates expected expressed families FDR and SDR females field five four frequency of single GCA variance genes genetic genotypes Hancock haploid heritability heterozygous hybrids involved Lennon linked loci males map units marketable tuber yield matings mean mode of 2n observed obtained Ov+L Ro Ov+L oval parents Peloquin pigmentation plant possible potato probability produced progenies from 4x proximal locus ps/ps random ratio region respectively Ro Ov+L Ro round selection significant single exchange tetrads specific gravity sprouts studies Table tetraploid total tuber yield traits Trial tuber shape Tuberosum types unpigmented variance weight