PMID- 27637886
OWN - NLM
STAT- MEDLINE
DCOM- 20170207
LR  - 20220309
IS  - 1432-2242 (Electronic)
IS  - 0040-5752 (Linking)
VI  - 129
IP  - 12
DP  - 2016 Dec
TI  - Recombination and genetic variance among maize doubled haploids induced from F(1) 
      and F(2) plants.
PG  - 2429-2436
AB  - Inducing maize doubled haploids from F (2) plants (DHF2) instead of F (1) plants 
      (DHF1) led to more recombination events. However, the best DHF2 lines did not 
      outperform the best DHF1 lines. Maize (Zea mays L.) breeders rely on doubled 
      haploid (DH) technology for fast and efficient production of inbreds. Breeders 
      can induce DH lines most quickly from F(1) plants (DHF1), or induce DH lines from 
      F(2) plants (DHF2) to allow selection prior to DH induction and have more 
      recombinations. Our objective was to determine if the additional recombinations 
      in maize DHF2 lines lead to a larger genetic variance and a superior mean of the 
      best lines. A total of 311 DHF1 and 241 DHF2 lines, derived from the same 
      biparental cross, were crossed to two testers and evaluated in multilocation 
      trials in Europe and the US. The mean number of recombinations per genome was 
      14.48 among the DHF1 lines and 21.38 among the DHF1 lines. The means of the DHF1 
      and DHF2 lines did not differ for yield, moisture, and plant height. The genetic 
      variance was higher among DHF2 lines than among DHF1 lines for moisture, but not 
      for yield and plant height. The ratio of repulsion to coupling linkages, which 
      was estimated from genomewide marker effects, was higher among DHF1 lines than 
      among DHF2 lines for moisture, but not for yield and plant height. The higher 
      genetic variance for moisture among DHF2 lines did not lead to lower moisture of 
      the best 10 % of the lines. Our results indicated that the decision of inducing 
      DH lines from F(1) or F(2) plants needs to be made from considerations other than 
      the performance of the resulting DHF1 or DHF2 lines.
FAU - Sleper, Joshua A
AU  - Sleper JA
AD  - Syngenta Seeds, LLC, 317 330th Street, Stanton, MN, 55018, USA.
AD  - Department of Agronomy and Plant Genetics, University of Minnesota, 411 Borlaug 
      Hall, 1991 Upper Buford Circle, Saint Paul, MN, 55108, USA.
FAU - Bernardo, Rex
AU  - Bernardo R
AUID- ORCID: 0000-0003-3323-4690
AD  - Department of Agronomy and Plant Genetics, University of Minnesota, 411 Borlaug 
      Hall, 1991 Upper Buford Circle, Saint Paul, MN, 55108, USA. bernardo@umn.edu.
LA  - eng
PT  - Journal Article
DEP - 20160908
PL  - Germany
TA  - Theor Appl Genet
JT  - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
JID - 0145600
RN  - 0 (DNA, Plant)
SB  - IM
MH  - Crosses, Genetic
MH  - DNA, Plant/genetics
MH  - *Haploidy
MH  - Phenotype
MH  - Plant Breeding
MH  - Polymorphism, Single Nucleotide
MH  - *Recombination, Genetic
MH  - Zea mays/*genetics
EDAT- 2016/09/18 06:00
MHDA- 2017/02/09 06:00
CRDT- 2016/09/18 06:00
PHST- 2016/04/02 00:00 [received]
PHST- 2016/08/30 00:00 [accepted]
PHST- 2016/09/18 06:00 [pubmed]
PHST- 2017/02/09 06:00 [medline]
PHST- 2016/09/18 06:00 [entrez]
AID - 10.1007/s00122-016-2781-4 [pii]
AID - 10.1007/s00122-016-2781-4 [doi]
PST - ppublish
SO  - Theor Appl Genet. 2016 Dec;129(12):2429-2436. doi: 10.1007/s00122-016-2781-4. 
      Epub 2016 Sep 8.