MAIZE BREEDING & GENETICS @ THE UNIVERSITY OF GUELPH, DEPARTMENT OF PLANT AGRICULTURE


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Germplasm

Recurrently Selection Breeding Populations

The populations are the result of over 30 years of population development and improvement by the University of Guelph corn breeding program. The populations in Table 1 have been assigned Plant Introduction numbers and are part of the USDA's Germplasm Resource Information Network (GRIN). Seed for the populations in Table 1 can be obtained from the GRIN system, however the University of Guelph does request that any user of these population enter into a germplasm use agreement with the university.

Grain yield, maturity and standability have been the primary focus of the Guelph population improvement program. The populations described have all undergone various methods of recurrent selection and are developed for short-season environments [< 2800 OCHU]. Unless otherwise stated, selection was based on a performance index (PI) of grain yield/grain moisture.

12 of these populations have been evaluated as population crosses.

Table 1.
Thirty-eight maize (Zea mays L.) breeding populations developed at the University of Guelph for short-season environments. Recurrent selection methods for population improvement were selfed progeny (S), half-sib (HS), reciprocal recurrent selection (RRS), combined S and RRS, or mass selection (M).

Population Plant introduction number Recurrent selection method Cycle of selection
CG-SynA 613059 - 0
613060 S 7
613061 HS 18
613062 RRS 6
CG-SynB 613063 S 7
613064 HS 18
CG-SynC 613065 S 3
CG-Wigor 613066 - 0
613067 S 3
613068 RRS 7
CG-HOPE Elite A 613069 RRS 6
CG-HOPE Elite B 613070 RRS 6
CG-Stiff Stalk 613071 - 0
613072 RRS 5
613073 S 5
613074 combined S & RRS 4
CG-Lancaster 613075 - 0
613076 RRS 5
613077 S 5
613078 combined S & RRS 4
CG-CBI 613079 RRS 5
CG-CBII 613080 RRS 5
CG-CCGP 613081 - 0
CG-CCGP A 613082 RRS 3
CG-CCGP B 613083 RRS 3
CG-SynGA 613084 - 0
CG-SynGB 613085 - 0
CG-Schindelmeiser 613086 S 4
Populations crossed to CG-SynA-NL
OhS4 (S) C1 613087 M for earliness 5
OhS3 (S) C1 613088 M for earliness 4
BS2 613089 M for earliness 4
BS16 613090 M for earliness 4
Mexican Dent 613091 M for earliness 4
Cateto Flint 613092 M for earliness 4
Populations from Gerrish
Coroico Flour 613093 M for earliness 4
Cuzco Flour 613094 M for earliness 4
Cateto Flint 613095 M for earliness 4
Caribbean Flint 613096 M for earliness 8