HETEROSIS STUDIES IN WHEAT CROSSES,Fida Hussain,Makhdoom Hussain,M. Muzaffar Iqbal,Mansoor A. Akhtar

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A study was undertaken to estimate the heterotic and heterobeltiotic effects in wheat during the year 2002-03 at Wheat Research Institute, AARI, Faisalabad, Pakistan to identify combinations expressing high hybrid vigour. Fifteen F1 single crosses were developed and planted alongwith their 8 parents. Data were recorded on grain yield, tillers per plant, grains per spike, 1000-grain weight and plant height. Highly significant differences were found among genotypes for hybrid vigour for all traits. Out of 15 crosses, four crosses showed significantly positive heterosis and three crosses exhibited significant positive heterobeltiosis for grain yield. Heterotic and heterobeltiotic effects on grain yield ranged from 1.43 to 52.01 percent and 5.00 to 48.19 percent, respectively. Maximum heterosis (52.01%) and heterbeltiosis (48.19%) for grain yield were expressed by cross Iqbal-2000 x Chenab-2000. For tillers per plant, heterosis and heterobeltiotic effects ranged from 2.33 to 21.22 and 1.53 to 5.78 percent, respectively. Ranges for grains per spike were 1.61 to 13.12 and 1.48 to 6.86 percent, respectively. Heterotic and heterobeltiotic effects ranged from 1.62 to 20.97 and 4.65 to 15.33 percent, respectively for 1000-grain weight. The parents Iqbal-2000, Chenab-2000, MH- 97, and Crow's' could be utilized in hybrid wheat programme.
Published in 2007.
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