Person: Kuchanur, P.
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Kuchanur
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Kuchanur, P.
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0000-0003-4791-5980 7 results
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- Character association study in maize hybrids developed through integration of rapid cycle genomic selection and doubled haploid technology for heat stress tolerance(Sciencedomain International, 2023) Swamy, N.; Kuchanur, P.; Patil, A.; Zaidi, P.; Vinayan, M.T.; Arunkumar, B.; Sowmya, H.C.; Dhanoji, M.M.
Publication - Heat-tolerant maize for rainfed hot, dry environments in the lowland tropics: from breeding to improved seed delivery(Institute of Crop Sciences, 2023) Zaidi, P.; Vinayan, M.T.; Nair, S.K.; Kuchanur, P.; Kumar, R.; Singh, S.B.; Tripathi, M.P.; Patil, A.; Ahmed, S.; Hussain, A.; Kulkarni, A.P.; Wangmo, P.; Tuinstra, M.R.; Prasanna, B.M.
Publication - Assessing combining ability of doubled haploid maize (Zea mays L.) breeding lines for grain yield and yield components under heat stress condition(SCIENCEDOMAIN international, 2022) Patil, S.V.; Doggalli, G.; Kuchanur, P.; Zaidi, P.; Patil, A.; Arunkumar, B.; Vinayana, M.T.; Tembhurne, B.V.; Suma, T.C.; Seetharam, K.
Publication - Genotype-by-environment interaction effects under heat stress in tropical maize(MDPI, 2020) Vinayan, M.T.; Zaidi, P.; Seetharam, K.; Das, R.R.; Viswanadh, S.; Ahmed, S.; Miah, M.A.; Koirala, K.B.; Tripathi, M.P.; Arshad, M.; Pandey, K.; Chaurasia, R.; Kuchanur, P.; Patil, A.; Mandal, S.S.
Publication - Environmental variables contributing to differential performance of tropical maize hybrids across heat stress environments in South Asia(Southern Cross Publishing Group, 2019) Vinayan, M.T.; Zaidi, P.; Seetharam, K.; Md. Ashraful Alam; Ahmed, S.; Koirala, K.B.; Arshad, M.; Kuchanur, P.; Patil, A.; Mandal, S.S.Heat stress resilience in maize hybrids is emerging as an important trait in germplasm targeted for cultivation in the post-rainy season spring in South Asia. One of the major challenges in targeted breeding for these agro-ecologies is the differential response of maize genotypes to heat stress across locations during the spring season. This study is targeted at identifying the major environmental variables that contributed to the genotype × environmental (GEI) yield variations observed among genotypes grown in response to heat stress. The trial dataset used for this study constitutes 46 trials × location combinations spread over a period of three years (2013- 2015). Partial least square (PLS) regression analysis was implemented to decipher the important environmental variables contributing to the observed yield variation among maize trials planted during spring across locations of South Asia. The first two factors from the PLS study explained the 30 per cent yield variation across trials. The largest contributor of this variation was relative humidity (RH) and vapor pressure deficit (VPD) during flowering stage of the crop across the years.
Publication - Stability for grain yield and other traits in tropical maize (Zea mays L.) under heat stress and optimal conditions(Excellent Publishers, 2018) Archana, K.A.; Kuchanur, P.; Zaidi, P.; Mandal, S.S.; Arunkumar, B.; Patil, A.; Seetharam, K.; Vinayan, M.T.Twenty four newly developed maize hybrids along with three commercial checks were evaluated for their yield performance at three locations under heat stress and optimal conditions. Pooled analysis of variance revealed significant differences among hybrids for grain yield. Mean sum of squares due to environments and linear component of environments were significant for all the traits studied. Whereas, mean sum of squares due to hybrids × environment interactions and linear component of hybrids × environment interaction were significant only for grain yield indicating the diversity among the selected environments. Based on the stability parameters, the hybrids, VL 107 × VL128 (0.97) and ZL 1110175 ×VL 1033 for days to 50 % anthesis, ZL 14501 × VL 1032 for days to 50 % silking, VL 1011 × VL 1033 for anthesis silking interval and ZL 11953 × VL 1032 for grain yield were identified as stable as they recorded regression value nearer to unity and non-significant deviation from regression.
Publication - Line x testers analysis of tropical maize inbred lines under heat stress for grain yield and secondary traits(Consiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Maiscoltura, 2016) Dinesh, A.; Patil, A.; Zaidi, P.; Kuchanur, P.; Vinayan, M.T.; Seetharam, K.The combining ability and mode of gene action in tropical maize germplasm is not extensively studied. In the present study, a line x tester analysis involving 290 test-cross hybrids developed by crossing 145 tropical maize inbred lines with two testers and four standard checks was conducted for grain yield and other agronomic traits under heat stress during summer 2013 at B gudi agriculture research station. The main objective of the investigation was to study mode of gene action governing the traits under heat stress along with identification of superior inbred lines based on combining ability to develop heat tolerant hybrids. Analysis of variance showed that mean squares for genotypes was highly significant for grain yield, days to anthesis and silking, anthesis silk interval, plant height and ear height under heat stress. The combining analysis for lines (GCA), tester (GCA) and line x tester (SCA) showed significant difference (P < 0.01) for all the traits under study except ASI for LXT interaction. This indicates that both additive and non additive gene action control the expression of these traits under heat stress. The low GCA variance to SCA variance ratio for all the traits showed preponderance of non-additive gene action in the inheritance of the traits. Among 145 inbred lines used for study, the inbreds L78, L73, and L37 showed good general combining ability for grain yield. The crosses L118 x L2 and L143 x L1 were having good specific combiners ability for grain yield under heat stress. These inbreds can be used in breeding program for development of heat tolerant hybrids through exploitation of dominant gene action.
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