Studies on the Heterotic Potential of Single and Three-way Cross Hybrids of Okra (Abelmoschus Esculentus (L.) Moench.)

Three‐Way Crosses vs. Single Crosses in Tobacco: First Agronomic Assessment

“…In a study on sorghum (Patanothai and Atkins, 1974), the basis for the advantage of three-way crosses over single crosses was the increased yield stability of the three-way crosses. Eswaran and Kumar (2013) argued that the superiority of three-way hybrids over single crosses would be expected in self-pollinated species, an argument that agrees with the outcome of this study. In the studies of Sundaram et al (1994) and Dhadde et al (2009), three-way hybrids of tomatoes showed gains in yield compared with single-cross hybrids, which was confirmed by Geleta and Labuschagne (2004) in peppers.…”

“…Crops in which at least some TWCHs gave yields greater than their single-cross counterparts include okra (Eswaran and Kumar, 2013), sorghum (Liang, 1971), soybean (Thorne and Fehr, 1970), durum wheat (Talwar and Joshi, 1983), and rice (Yu et al, 2005). Crops in which at least some TWCHs gave yields greater than their single-cross counterparts include okra (Eswaran and Kumar, 2013), sorghum (Liang, 1971), soybean (Thorne and Fehr, 1970), durum wheat (Talwar and Joshi, 1983), and rice (Yu et al, 2005).…”

“…The results are not entirely surprising because they are in line with earlier observations on self-pollinated species other than tobacco. Crops in which at least some TWCHs gave yields greater than their single-cross counterparts include okra (Eswaran and Kumar, 2013), sorghum (Liang, 1971), soybean (Thorne and Fehr, 1970), durum wheat (Talwar and Joshi, 1983), and rice (Yu et al, 2005). Stephens and Lahr (1959) showed that three-way hybrids of sorghum tended to outyield related single crosses but only under overall high-yielding conditions.…”

“…Multiple-cross hybrids were first used in maize to circumvent poor seed-set in and reduced pollen production by parental inbred lines because of selfing of a naturally outcrossing species (Wright, 1980). Some self-pollinated species followed suit, e.g., sorghum (Patanothai and Atkins, 1974;Liang, 1971), rice (Taillebois, 2006), barley (Mühleisen et al, 2014), soybean (Thorne and Fehr, 1970), tomato (Sundaram et al, 1994;Ashakina et al, 2016), peppers (Geleta and Labuschagne, 2004), ground nuts (John and Reddy, 2015), and okra (Eswaran and Kumar, 2013). Some self-pollinated species followed suit, e.g., sorghum (Patanothai and Atkins, 1974;Liang, 1971), rice (Taillebois, 2006), barley (Mühleisen et al, 2014), soybean (Thorne and Fehr, 1970), tomato (Sundaram et al, 1994;Ashakina et al, 2016), peppers (Geleta and Labuschagne, 2004), ground nuts (John and Reddy, 2015), and okra (Eswaran and Kumar, 2013).…”

Genetical Studies on Assessment of Heterosis for Fruit Yield and Attributing Characters in Okra [Abelmoschus esculentus (L.) Moench]

“…Exploitation of hybrid vigour is an important tool for making genetical improvement of yield and its attributing characters in okra . Heterosis for yield and yield attributing traits are reported by several other researchers (Eswaran et al, 2013;Ramya et al, 2010;Kumar et al, 2010;Nagesh et al, 2014). The magnitude of heterosis for yield and its components provides a basis for determining genetic diversity and also serves as a guide for the choice of desirable parents for developing superior F1 hybrids to exploit hybrid vigour.…”