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Saxena K.B.,Indian International Crops Research Institute for the Semi Arid Tropics | Sawargaonkar S.L.,Vasantrao Naik Marathwada Krishi Vidhyapeeth | Sawargaonkar S.L.,Indian International Crops Research Institute for the Semi Arid Tropics
Euphytica | Year: 2014

To break the decades-old yield barrier in pigeonpea [Cajanus cajan (L.) Millsp.] a hybrid breeding technology was successfully developed and the first two hybrids were recently released in India. In order to produce heterotic hybrid combinations, the first logical step is the identification and selection of genetically diverse parents with favorable alleles. In this context, the concept of classifying hybrid parents into different heterotic groups was developed and successfully used in maize and later adopted in other crops. Since hybrid technology in pigeonpea is new, the authors have made the first attempt to identify heterotic groups using SCA effects of 102 crosses generated from line × tester mating and evaluated them at four locations. Based on the performance of hybrids in terms of SCA effects, seven heterotic groups were constituted. Besides this, a scheme to use this information in breeding high yielding hybrids with specific or wide adaptation is also discussed herein. Genetic diversity between lines and tester showed positive association with the heterotic pools generated on the basis of SCA. © 2014 Springer Science+Business Media Dordrecht. Source


Badgujar A.G.,Vasantrao Naik Marathwada Krishi Vidhyapeeth | Bhosle B.B.,Vasantrao Naik Marathwada Krishi Vidhyapeeth | Shinde S.T.,Vasantrao Naik Marathwada Krishi Vidhyapeeth | Bhede B.V.,Vasantrao Naik Marathwada Krishi Vidhyapeeth | Dhurgude S.S.,Vasantrao Naik Marathwada Krishi Vidhyapeeth
Journal of Entomological Research | Year: 2015

Among all BG-I Bt cotton hybrids, aphid population ranged from 7.18 to 17.58 / three leaves. Minimum aphid population was recorded on ACH-155 (7.18) and maximum on RCH-2 (17.58). Among BG-II cotton hybrids, aphid population ranged from 7.63 to 19.70 / three leaves. Minimum aphid population was observed on ACH-155 (7.63) and maximum on MRC-7326 (19.70). Among all Bt cotton (BG-I and BG-II) hybrids, aphid population ranged from 7.18 to 19.70 / three leaves. Minimum aphid population was observed on ACH-155 BG-I (7.18) which was found significantly superior over rest of hybrids except SP-499 BG-I (7.29), SP-1037 BG-I (7.30) and ACH-155 BG-II (7.63) which were at par with each others. Maximum population of aphid was observed on MRC-7326 BG-II (19.70) over rest of hybrids except UPLHH-2 BG-II (18.24), RCH-2 BG-II (18.06) and RCH-2 BG-I (17.58) which were at par with each others. The jassid population on BG-I Bt hybrids ranged from 1.50 to 5.64/three leaves, minimum being on ACH-21-1-BG-I (1.50 / three leaves) and maximum on RCH-2 BG-I (5.64 / three leaves). Among BG-II hybrids it ranged from 1.95 to 6.95 / three leaves, minimum being on MRC-7326 BG-II (6.95 / three leaves), followed by VBCH-1501 BG-II (6.52 / three leaves). Among all Bt cotton hybrids jassid population ranged from 1.50 to 6.95 / three leaves. Source

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