Agricultural Science Digest

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Agricultural Science Digest, volume 35 issue 4 (december 2015) : 269-274

Estimation of combining ability and heterosis for quantitative traits in maize (Zea mays L.) using diallel approach

G.R. Lahane, J.M. Patel*1, R.M. Chauhan
1<p>Maize Research Station, S.D. Agrucultural University,&nbsp;MRS, Bhiloda-383245, Gujarat, India.</p>
Cite article:- Lahane G.R., Patel*1 J.M., Chauhan R.M. (2015). Estimation of combining ability and heterosis for quantitative traits in maize (Zea mays L.) using diallel approach . Agricultural Science Digest. 35(4): 269-274. doi: 10.18805/asd.v35i4.6857.

Twenty eight hybrids obtained by crossing eight lines along with hybrid check were evaluated to study the hybrid vigor and combining ability in  maize crop season rabi 2012-13 at Maize Research Station,Sardarkrushinagar Dantiwada Agricultural University, Bhiloda. The magnitude of heterosis was  varied from character to character. The standard heterosis for number of ears per plant was registered for the hybrid I-07-11-3-3 × I-07-59-5 (28.57%). Low values of heterosis were observed for days to tasseling, days to silking and days to brown husk formation, while moderate values of heterosis were recorded for the other yield attributing traits. Maximum heterosis for ear eight was manifested by hybrid I-07-59-5(21.25%) followed by cross combinations I-07-11-3-3 x _07-65-18-3(21.16%) and  I-07-6-4-4 x I -07-59-5(18.39). Parents P1, P4, P5 and P7 showed GCA in desirable direction for flowering and maturity traits. For yield and yield attributing traits the parents P2, P4, P5 and P7  reflected positive and significant general combining effects for most of the traits under investigation. None of the hybrid found as good specific combiner for all the traits but cross combination I-07-9-3-1 x I-07-05-13-1 and I-07-11-3-3 x I-07-59-5 was found as good specific combiner for most of the maturity and yield attributing traits.

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