Rangel R M, Amaral A T, Scapim C A, Freitas S P, Pereira M G
Laboratório de Melhoramento Genético Vegetal, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil.
Genet Mol Res. 2008 Oct 7;7(4):1020-30. doi: 10.4238/vol7-4gmr502.
With the aim of estimating genetic parameters and identifying superior popcorn combinations, 10 parents were crossed in a circulant diallel and evaluated together with the 15 resulting hybrids at two locations in two growing seasons for grain yield, number of broken plants, number of partially husked ears and popping expansion. The hybrids were less sensitive to environmental variations than the parents of the diallel in the 2003/2004 and 2004/2005 growing seasons. The genetic parameters suggested possible genetic gains for grain yield and popping expansion, mainly. Bidirectional dominance could have occurred for popping expansion. Heterobeltiosis for grain yield seems to be a common effect in popcorn. The intrapopulation breeding for popping expansion may offer superior genetic gains, but for grain yield, interpopulation breeding is required. The performance of UNB2U-C1 x BRS Angela indicated this hybrid for experimental cultivation in the northern and northwestern Fluminense region in Rio de Janeiro State, Brazil.
为了估计遗传参数并鉴定优良的爆米花组合，采用循环双列杂交法将10个亲本进行杂交，并在两个生长季节于两个地点，将所得的15个杂交种与其亲本一起对籽粒产量、断株数、部分脱壳穗数和爆裂膨胀度进行评估。在2003/2004和2004/2005生长季节，杂交种比双列杂交的亲本对环境变异的敏感性更低。遗传参数表明，主要在籽粒产量和爆裂膨胀度方面可能存在遗传增益。对于爆裂膨胀度可能发生了双向显性。籽粒产量的杂种优势似乎是爆米花中的常见效应。针对爆裂膨胀度进行群体内育种可能会带来更高的遗传增益，但对于籽粒产量，则需要进行群体间育种。UNB2U-C1×BRS Angela的表现表明，该杂交种适合在巴西里约热内卢州弗卢米嫩塞地区的北部和西北部进行试验种植。
