Academic Journals Database
Disseminating quality controlled scientific knowledge

ALTERNATIVES FOR OBTAINING DOUBLE CROSS MAIZE HYBRIDS

ADD TO MY LIST
 
Author(s): FAUSTO DE SOUZA SOBRINHO | MAGNO A. P. RAMALHO | JOÃO CÂNDIDO DE SOUZA

Journal: Revista Brasileira de Milho e Sorgo
ISSN 1676-689X

Volume: 1;
Issue: 1;
Start page: 70;
Date: 2002;
Original page

Keywords: Quantitative genetics: maize | double cross hybrids

ABSTRACT
In the search for an alternative to reduce the price of hybrid maize seeds thepresent experiment was carried out to compare the performance and variability among doublecross hybrids (DC) derived from the F1 and F2 generations, and from intercrossed plants of theF2 generation of some single cross hybrids (SC). Experiments were carried out in two agriculturalseasons. In the first, 1997-98, 42 double cross hybrids were obtained from seven commercialsingle cross hybrids, that is, 21 from F1 and 21 from F2 generations of the respective singlecross hybrid. These hybrids were evaluated in three locations, in two experiments/location,one of them with DC hybrids from F1 generation, and the other with DC from F2. Four SChybrids were used as controls in each experiment. In the 2000/2001 season 36 DC hybridswere evaluated, 15 derived from the F1 generation, 15 from the F2 generation of the same SChybrids and six from the F2i generation. The 36 DC hybrids and six controls were evaluated intwo locations. The grain yield of some DC hybrids was as high as the yield of the best SChybrid recommended for the region. The double cross hybrids, from different origins, that is,the F1, F2 or F2i generations were similar in their yield performance and variability what showsthat it is possible to reduce the cost of double cross hybrid seed production using the intercrossedpopulation derived from the SC hybrid, so line multiplication is not needed nor does the SC F1 hybrid have to be obtained every year.
Save time & money - Smart Internet Solutions     

Tango Rapperswil
Tango Rapperswil