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Mohan Rao, A.
- Photo-thermal Effects on Time to Flowering in Dolichos Bean (Lablab purpureus (L). Sweet) Var. Lignosus
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Authors
Affiliations
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences, GKVK, Bengaluru 560 065, IN
2 All India Coordinated Research Project on Pigeonpea, Zonal Agricultural Research Station, UAS, Bengaluru 560 065, IN
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences, GKVK, Bengaluru 560 065, IN
2 All India Coordinated Research Project on Pigeonpea, Zonal Agricultural Research Station, UAS, Bengaluru 560 065, IN
Source
Current Science, Vol 115, No 7 (2018), Pagination: 1320-1327Abstract
Prediction of time to flowering of crop plants (especially photoperiod sensitive (PS) ones) help make appropriate crop management decisions such as choosing optimum sowing and harvesting dates which in turn determine plant size and thus affect dry matter production and crop yield. Modelling time to flowering of dolichos bean, a highly PS short-day food legume crop species, indicated greater role of temperature than photoperiod in regulating time to flowering of PS genotypes. The PS and photoperiod insensitive (PIS) genotypes of dolichos bean differed for base (Tb) and optimum temperature requirement for time to flowering. However, they were comparable for critical minimum, maximum and optimum photoperiod requirement for time to flowering. Dolichos bean requires critical minimum, maximum and optimum photoperiods of 11.11, 12.28 and 12.21 h respectively, and critical minimum growing degree days of 372.05°C day-1 and optimum temperature of 23.13°C for time to flowering. Using average daily air temperature, and working backwards in time, it is possible to predict the combination of dolichos bean cultivar and sowing date that will produce ready for harvest crop on a predetermined day when fresh pod quality is optimal.Keywords
Base Temperature, Critical Photoperiod, Dolichos Bean, Regression Models.Full Text
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- Inheritance of Fruitinghabit Traits in Chilli (Capsicum annuum L.)
Abstract Views :277 |
PDF Views:86
Authors
Affiliations
1 Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Gandhi Krishi Vignana Kendra, Bengaluru 560 065, IN
1 Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Gandhi Krishi Vignana Kendra, Bengaluru 560 065, IN
Source
Current Science, Vol 118, No 10 (2020), Pagination: 1598-1602Abstract
Fruiting habit, viz. fruits node–1 and fruit orientation are economically important traits in chilli. Fruiting habit could be solitary erect, solitary pendant, clus-tered erect or clustered pendant. Farmers’ preference for fruiting habit traits varies from region to region. An understanding of the inheritance of fruiting habit traits helps accelerate breeding chilli cultivars with farmer-preferred combination of such traits. Eight diverse genotypes contrasting for fruiting habit traits were crossed to develop ten F1 hybrids of six combina-tions. The F2 and backcross generations of all the six distinct types of crosses were evaluated and pattern of segregation for fruiting habit traits was recorded. Results indicated bi-allelic, monogenic inheritance of fruits node–1 (solitary versus clustered) and fruit orientation (pendant versus erect) with solitary being dominant over clustered and pendant being dominant over erect orientation respectively. Genes controlling fruits node–1 and orientation of fruits segregated inde-pendently. Implications of these results are discussed in relation to strategic and applied chilli breeding.Keywords
Chilli, Fruiting Habit Traits, Goodness-of-Fit, Inheritance.Full Text
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