Studies on correlation and path coefficient analysis on yield attributes in root knot nematodes resistant F1 hybrids of tomato

Abstract: Investigations were undertaken to develop F hybrids in tomato for high yield, processing qualities with resistance to root knot nematode (Meloidogyne incognita) by studying eighty hybrids developed, involving fourteen parents mated in a Line x Tester fashion (both direct and reciprocal crosses). Among the hybrid combinations, twenty-three hybrids were found to be resistant to root knot nematode under both natural condition in field and artificial inoculation in pot culture. These hybrids were test verified by raising again. Among the twenty three hybrids, CLN 2026C x SL 120, CLN 2026E x SL 120, LE 812 x SL 120 and CLN 1464A x SL 120 were found to be high yielding with resistance to root knot nematode along with good processing qualities. The yield contributing traits like plant height, fruit weight and quality traits like pericarp thickness, acidity, ascorbic acid and lycopene were found to have positive and significant association with yield per plant both at genotypic and phenotypic levels. The other resistant traits like root length, total phenol, orthodihydroxy phenol, IAA oxidase, chlorogenic acid and ascorbic acid in roots showed negative and significant association with root gall index, suggesting their role in root knot nematode resistance. These characters could be reliably looked for, while selecting a high yielding genotype

Indigenous storage structures

225-229Indigenous practices play a vital role in sustainable agriculture development and are unique to a given culture of society. An exhaustive survey was conducted in dry tracts of Tamil Nadu to document the indigenous storage structures used by farmers. Information was documented by using participatory Rural Appraisal (PRA) techniques. During survey, various types of indigenous storage structures used at the farm level in Tamil Nadu were identified. Among these, Kodambae (large sized cylindrical structures), Kuthir (medium capacity bins) and mud pots paanai (small capacity storage) are common types of storage systems. Grains are also stored in conventional granary rooms. Bamboo structures, urai indigenously oven is also in use. These structures are designed to enable the grain to be loaded and unloaded, with the possibility of periodic removal of limited quantities of grain, after which the unloaded part was sealed. By this way, the quality of grain was maintained in good condition

Cow based Indigenous Technologies in dry farming

47-50Indigenous knowledge is the accumulated knowledge, skills and technology of the local people, derived from the direct interaction of human beings and their environment. The study was conducted at Coimbatore and Erode districts, in the western zone of Tamil Nadu with an objective of documenting the indigenous technologies adopted by the dry land farmers. Documentation of indigenous technologies was done adopting both individual and group approach. The paper describes five indigenous technologies involving cow-based products used by farmers for various purposes and an analysis on its impact. It is hoped to help the farmers to understand and exchange the cheaper, viable and reliable technologies in their areas

Traditional storage practices

564-568 Indigenous knowledge has two powerful advantages over scientific knowledge like it has little or no cost, and is readily available. Indigenous knowledge is the accumulated knowledge, skills and technology of the local people, derived from the direct interaction of human beings and their environment. The study was conducted at remote villages of Coimbatore, Salem, Erode, Krishnagiri, Dindigul, Villupuram, Ramnad and Virudhunagar districts of Tamil Nadu with an objective of documenting the indigenous storage techniques adopted by the dry land farmers. Documentation of traditional storage practices was done by direct interview and group discussion methods. Triangulation exercise was also done in the study villages to gather reliable information about Indigenous Technical Knowledge of the dry land farmers of Tamil Nadu. In the paper, some of the identified important indigenous storage practices adopted by the dry land farmers are described. </smarttagtype

Native ecological techniques for economizing water usage in dry farming in Tamil Nadu

627-629Indigenous practices play a vital role in sustainable agriculture development and it is unique to a given culture of society. This knowledge is the information base for a society and facilitates communication and decision making for their development. The study was focused on the technologies being practiced by farmers for water conservation in dry tracts of South India. The study was conducted at Ramnad, Tuticorin and Virudhunagar districts with an objective of documenting the native ecological techniques for economizing water usage among the dry land farmers. Documentation of indigenous techniques for water conservation was done using Participatory Rural Appraisal techniques and direct interview method. Triangulation exercise was also done in the study villages to gather reliable information. Indigenous water saving techniques adopted by the dry land farmers of Tamil Nadu has been described

Indigenous storage practices in pulses

104-107Indigenous knowledge is the accumulated knowledge, skills and technology of the local people, derived from the direct interaction of human beings and their environment. An investigation was undertaken to document the indigenous post harvest technologies in pulses. The study was conducted in dry farming tracts of Tamil Nadu. Documentation of indigenous storage technologies was done by direct interview and group discussion methods. In this paper, the indigenous storage practices adopted by the dry land farmers were identified and documented

Traditional tools in agricultural practices

212-217The study was undertaken to identify various traditional tools used for agricultural operations by the farmers of Tamil Nadu. Agricultural tools are as old as Stone Age. Traditional agricultural tools were economical in terms of labour, money and time saving. These tools were made up of locally available materials like stones, wood, etc. Traditional tools are operated easily without any special skills. The study was conducted in Coimbatore, Erode, Salem, Krishnagiri, Villupuram, Dindigal, Madurai, Kovilpatty, Aruppukottai and Virudhunagar districts of Tamil Nadu. Information was documented by using Participatory Rural Appraisal (PRA) techniques like observation and discussion. In the study, 21 traditional agricultural tools were identified and described

High yielding and moderately resistant to fruit rot disease chilli hybrid – CCH 1 (TNAU Chilli Hybrid CO 1)

Anthracnose is one of the serious diseases in chilli which affects whole plant and also fruits in particular. A study wasundertaken to develop a high yielding and anthracnose disease resistant hybrid in chilli at the Dept. of Vegetable Crops, HC &RI, TNAU, Coimbatore during 2004-05. As a first step, ninety three germplasm lines maintained in the Dept. of Vegetablecrops were evaluated for disease resistant and yield. Three single plant selections namely Sln 1, Sln 2 and Sln 3 made inadvanced generations of a hybrid were found to be resistant and the genotypes Arka Lohit, Pepper Hot, CA 97, KDC 1,CC 4, CA 95, CA 115 and CA 59 were found to be moderately resistant. These selected lines were used both as male(testers) and lines as female parents and 30 hybrids were obtained. All these hybrids were tested for the performance ofyield, quality and disease resistance. Among them the hybrid combination of Sln 1 x CA 97 was identified as bestperformed hybrid CCH 1(TNAU Chilli Hybrid CO 1). This was test verified across the state in 8 MLT and 103 ARTplots along with NS 1701 and K 1 as check. The results showed that the per cent increase was 14.65 over NS 1701 and51.40 over K 1for green fruit yield and 19.15 and 60.86 for dry fruit yield respectively. The fruit rot incidence in termsof Percentage of Disease Index (PDI) observed was 12.50 and hence it is comes under moderately resistant group. Thisentry CCH 1 has been released as TNAU Chilli Hybrid CO 1 during the year 2009-10