The pearlmillet hybrid TNBH 5635 (732 A x PT 4450) was released as COHCu 8 during January 2001 for general cultivation in Tamil Nadu. It recorded a mean grain yield of 2819 kg ha-1 (21.7% over X7) under rainfed conditions and 3682 kg ha-1 (15.0% over X7) under irrigated conditions. It is resistant to downy mildew and possess 5-8 productive tillers with nonlodging and spindle type ear heads. The protein content is about 13.8 per cent with acceptable cooking quality. It can be grown in June" - July, September October and January February throughout Tamil Nadu and is the best alternative to X7 hybrid.
A multicut fodder sorghum COFS 29 (TNS 30 x S. sudanense) was developed to meet long felt demand of the dairy farmers of Tamil Nadu. The new variety is having a yield potential of 170 t ha of green fodder per year in five harvests (main crop + four ratoons) at 65-70 days intervals. It is tall in stature and produces 10-15 thin tillers, highly leafy with high palatability. It has more crude protein content than Co 27 and less crude fibre and HCN content. The Digestible Dry Matter and In vitro digestible dry matter are also higher than Co 27.
Genotypic and Phenotypic co-effecients of variation, heritability, and genetic advance were estimated in Seventy three single parent families of neem on Twenty six different seed, biochemical and seedling attributes. The analysis of variance indicated significant differences among the single parent families for all the characters. The GCV and PCV were the maximum for total azadirachtin and its fractions aza A, B, D and H. Heritabilitily values were high for all the parameters except for root fresh weight, shoot fresh weight and total fresh weight. High heritability combined with high genetic advance as percentage. of mean was observed for all the seed parameters, total azadirachtin and its fractions, number of leaves, root to shoot ratio and total dry weight.
Among the five species of Stylosanthes, viz.. S. scabra. Shamata, S. humulis, S.quianensis and S. viscosa tested for yield potential at the Department of Forage Crops, Tamil Nadu Agricultural University, Coimbatore. S.scabra was found superior. This species recorded 26.57 tons of green fodder 8.79 tons of dry matter, and 1.48 tons of crude protein per ha per year. It also had maximum dry matter content, plant height, branches and leaves per plant. Based on the desirable traits and high green fodder yield potential, Stylosanthes scabra was released under the local name Muyal masal by the Tamil Nadu Agricultural University, Coimbatore in January, 1991.
The sorghum culture TNS 296 (CO 25 x SPV 942) was released as a high yielding new sorghum variety CO (S) 28. It matures in 100-105 days and possesses a tall plant type. The plant remains green at maturity and non-lodging. It recorded an average grain yield of 2493 kg ha under rainfed condition which was 23.4 and 22.7 per cent more over the checks CO 26 and APK1 respectively. Its average grain yield under irrigated condition was 2568 kg ha'. CO (S) 28 was moderately resistant to grain mould disease and moderately susceptible to shoot fly
The cowpea culture COCP 702, a 20 kR gamma ray mutant derivative of CO 4 tested in station and district trials and as Co Vu 702 in the All India Coordinated trials of Arid legumes was released as a new cowpea variety CO(CP) 7 for general. cultivation in Tamil Nadu. The culture COCP 702 recorded an average yield of 900 kg/ha registering 18.9, 19.3 and 14.3 per cent increased yield over CO 6, P 152 (C 152) and Vamban 1 varieties respectively, when it was tested in 144 trials including 104 trials under farmers holdings (ART). It is suitable for cultivation in all the three seasons, where cowpea is grown in Tamil Nadu and it matures in 65-70 days. The resistance levels of this culture against major pests and diseases are on par with CO 6. The grain colour, appearance, flavour, texture and taste of COCP 702 is more preferred by the consumers compared to CO 6.
Groundnut variety COGn 4, a hybrid derivative of TMV 10 x ICGS 82 was released during January 2001 for Tamil Nadu. It has desirable attributes viz. high pod yield, high oil content, bold kernel with less incidence of bud necrosis. It matures in 110 days and gives an average yield of 1500 and 1950 kg ha' under rainfed and irrigated conditions respectively. This variety is suitable for both rainfed and irrigated conditions and can be grown during kharif, rabi and summer seasons.
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