EVALUATION OF EARLY GENERATION (S2) TEST CROSSES OF SELFED MAIZE LINES (Zea mays L.)
Öz
The mating of S2 plants to a tester for evaluation of combining ability is a technique widely used in hybrid breeding program. The high yielding S2 test crosses would be expected to have high yield progeny of later generation of selfing. In this study, S2 progeny 10 crossed to B73 tester (an inbred line) and lines 5 and 14 crossed to RD5560 (an inbred line) had the highest yield with a mean of 9.28, 9.10 and 9.03 Mg/ha, respectively. These lines will be retained for additional inbreeding and progeny with inferior testcross performance will be discarded. It will be expected that in later generations of selfing of these high yielding lines themselves will make high yielding hybrids when crossed to each other.
Anahtar Kelimeler
Kaynakça
- HALLAUER, AR. 1989. Methods used in developing maize inbreds. Maydica. 35: 1-16.
- GODSHALK, E. B. M. LEE and K.R. LAMKEY. 1990. Relationship of Restriction Fragment Length Polymorphism to Single Cross Hybrid Performance of Maize. Theor. Appl. Genet. 80: 273-280.
- MELCHINGER, A. E. M. LEE, K.R. LAMKEY and W.-L. WOODMAN. 1990. Genetic Diversity for RFLP: Relation to estimated genetic effects in maize inbreds. Crop. Sci. 30: 1033-1040.
- PRICE, S. C, A. L. KAHLER, A. R. HALLAUER, P. CHARMLEY, and D. A. GIELGEL. 1986. Relationships between performance and multilocus heterozygosity at enzyme loci in single cross hybrids of maize. J. of. Hered. 77:341-344.
- BECK, D. L., S. K. VASAL, and J. CROSSA. 1991. Heterosis and combining ability among subtropical and temperate intermediate-maturity maize germplasm. Crop Sci. 31:618-623. Table 1 . Mean squares from analysis of variance for three traits for the hybrids crossed to B73 grown in Ceyhan and Tarsus, Adana in 1995.
Ayrıntılar
Birincil Dil
İngilizce
Konular
-
Bölüm
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Yayımlanma Tarihi
1 Haziran 1996
Gönderilme Tarihi
4 Şubat 2015
Kabul Tarihi
-
Yayımlandığı Sayı
Yıl 1996 Cilt: 5 Sayı: 2