Pattern Formation Heterosis in Maize Varieties open pollinated and hybrid

Maize production can be improved with the use of high yielding varieties of open pollinated or hybrid . To obtain a high yield potential hybrid partner required genotype ( population ) that have different clusters . Of the population that can be repaired resulting strains that have a good affinity with the strain of the partner population . In 1993 , the Agency for Agricultural Research has established heterotic patterns populations of two couples , ie couples Synthetic Malang ( MS ) J1 to J2 version of the age , and couples MS K1 to K2 version early maturity . Cycle of activity on the 1st and 2nd , during 1999 ? 2002 has released three improved varieties of maize and eight open pollinated varieties of maize hybrids with superior yield potential from 7.60 to 9.00 t / ha . Similarity coefficient and genetic distance based on molecular markers ( SSR ) hybrid strains constituent Semar 8 ? PLANTS 10 and Milky - 1 according to the pedigree information . Two of the best lines as hybrid parents Bima1 ie Mr04 ( derived from MSJ1 ) and Mr14 ( derived from Suwan3 ~ MSJ2 ) has potential as a tester ( tester ) combining strains originating from outside groups and heterotic MSJ1 MSJ2 . Single cross hybrid ( ST ) N161 x Mr04 has yield 13.46 t / ha, ie 123 % and 87 % respectively over the hybrid Bima1 and NK33 . Strains that have specific combining ability ( SCA ) can either diintrogresikan to increase the genetic diversity of populations pair MSJ1 and MSJ2 . To open pollinated corn , five repeated cycles of selection berbalasan ( SBB ) has been carried out until 2004 . Population MSJ2C5 gives the average results of 7.38 t / ha which is 16 % higher than the varieties LAMURU ( MSJ2C2 ) or the selection progress for 339 kg / cycle .

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