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Anand Agricultural University, Anand

Anand Agricultural University (AAU) was established in 2004 at Anand with the support of the Government of Gujarat, Act No.(Guj 5 of 2004) dated April 29, 2004. Caved out of the erstwhile Gujarat Agricultural University (GAU), the dream institution of Sardar Vallabhbhai Patel and Dr. K. M. Munshi, the AAU was set up to provide support to the farming community in three facets namely education, research and extension activities in Agriculture, Horticulture Engineering, product Processing and Home Science. At present there seven Colleges, seventeen Research Centers and six Extension Education Institute working in nine districts of Gujarat namely Ahmedabad, Anand, Dahod, Kheda, Panchmahal, Vadodara, Mahisagar, Botad and Chhotaudepur AAU's activities have expanded to span newer commodity sectors such as soil health card, bio-diesel, medicinal plants apart from the mandatory ones like rice, maize, tobacco, vegetable crops, fruit crops, forage crops, animal breeding, nutrition and dairy products etc. the core of AAU's operating philosophy however, continues to create the partnership between the rural people and committed academic as the basic for sustainable rural development. In pursuing its various programmes AAU's overall mission is to promote sustainable growth and economic independence in rural society. AAU aims to do this through education, research and extension education. Thus, AAU works towards the empowerment of the farmers.

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20001
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Subject: Genetics and Plant Breeding × Author: PATEL, DIPAK A. × End date: 2009 × Start date: 2000 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    GENETIC STUDIES IN INTERSPECIFIC HYBRIDS OF FORAGE MAIZE (Zea mays L.)
    (AAU, Anand, 2000) PATEL, DIPAK A.; SHUKLA, P. T.
    Fourteen fodder maize genotypes (females) were crossed with three teosinte species (males) in a line x tester design. The resulting 42 interspecific hybrids alongwith 17 parents were grown in a randomized block design with three replications at the Agronomy Farm, B.A. College of Agriculture, Gujarat Agricultural University, Anand during kharif, 1997 and 1998. The main objective of the experiment was to study heterosis, combining ability and nature of gene action for various yield and quality characters. Analysis of variance, in general, revealed significant differences among genotypes (parents and F1S) for yield, its components and quality traits. The genotypes x years interaction was significant for all the characters indicating inconsistent behaviour of genotypes over years. African Tall, IC-130954 and IC-97915, among females and Z. perennis, among males gave the highest green fodder and dry matter yield and were also superior for number of yield components and quality traits. Among hybrids, P13 x P16 (African Tall x Z mexicana), P13 x P15 (African Tall x Z diploperemis) and P2 x P15 (IC-97915 x Z diploperennis) exhibited highest mean performance for green fodder and dry matter yield and also major yield components. In general, the parents showing superior performance gave superior hybrids and higher magnitude of heterosis in hybrid combinations. The highest magnitude of heterosis was observed for fresh stem weight per plant, green fodder yield per plant, dry matter yield per plant, leaf area per plant, crude protein content and stem diameter. On pooled basis, the crosses P2 x P16 (IC-97915 x Z mexicana), P2 x P15 (IC-97915 x Z diploperennis) and P1 x P15 (IC-77101 x Z diploperennis) were most heterotic for green fodder and dry matter yield and also for number of yield components. The hybrids P11 x P15 (IC-130917 X Z diploperennis) and P10 x P16 (IC-130882 x Z mexicana) were the best heterotic hybrids for crude protein content and neutral detergent fibre, respectively. Combining ability analysis indicated the importance of both additive and nonadditive genetic variance for the inheritance of most of the characters in 1998, however the ratio of σ2gca/σ2sca revealed the preponderance of non-additive gene action for all the characters except leaf area per plant. An observation of the general combining ability effects suggested that females African Tall, IC-97915 and IC-130671 were the best general combiners for green fodder and dry matter yield and also for number of yield components. Females IC-130917 and IC-130882 were good general combiners for crude protein content and neutral detergent fibre, respectively. Among male parents, Z diploperennis was the best pollinator for yield and quality traits. Per se performance holds direct relationship with gca effects and hence during parental selection, per se performance should be given due weightage alongwith gca effects. Estimates of sea effects did not reveal any specific trend, however the comparison of sea effects with per se performance of crosses indicated that at least one good general combiner was necessary for better per se performance alongwith high sea effects. On pooled basis, the hybrid P7 x P17 (IC-130730 x Z perennis) was the best specific combination for yield and its major components, whereas P5 x P15 (IC-13 0671 x Z. diploperennis) and P1 x P17 (IC-77101 x Z. perennis) were the best hybrids for crude protein content and neutral detergent fibre, respectively. In view of the preponderance of non-additive gene effect and presence of high magnitude of heterosis and heterobeltiosis in the expression of yield and its attributes particularly during 1998, the exploitation of hybrid vigour on commercial scale is suggested. However, to exploit the additive genetic variance present in sizable proportion for yield and yield components, biparental approach in the segregating generations like F2, using any of the three North Carolina Design or population approach as suggested by Doggett (1972) may be adopted.