Papaya Biology, Cultivation, Production and Uses
Botany and Improvement 21 embryo in most of the cases can be cultivated through embryo culture. Crosses between species of Group ...
22 Papaya flowers on long peduncles, (cii) hermaphrodite flowers with few female flowers and (ciii) hermaphrodite flowers with m ...
Botany and Improvement 23 ten, with different degrees of fusion. This type of flower produces irregu- larly shaped fruit known a ...
24 Papaya Teratological staminate flowers are produced by sex-reversing males. Depending upon the variations in environmental co ...
Botany and Improvement 25 and flower extracts of vegetative male and female plants in papaya. As the flowers developed some new ...
26 Papaya and change independently. Papaya’s trioecious sex is determined by a pair of incipi- ent sex chromosomes. Carica papay ...
Botany and Improvement 27 an example of the earliest stage of sex chromosome evolution. In the second stage, recombination is su ...
28 Papaya The construction of the papaya hermaphrodite BAC library, made up of 39,168 clones with an average insert size of 132 ...
Botany and Improvement 29 sex determination locus. Physical mapping and sample sequencing of the non- recombination region led t ...
30 Papaya resulted in 12 genetic linkage groups, including nine major and three minor link- age groups (Chen et al. 2007). The t ...
Botany and Improvement 31 2.6 Inheritance Pattern Sex in papaya is controlled by five pairs of genes which occur in three sex de ...
32 Papaya Different hypotheses have been put forward on the genetics of sex determina- tion in papaya. Hofmeyr’s (Hofmeyr 1967) ...
Botany and Improvement 33 that is, pistillate or female. Length and ramification of the inflorescences are second- ary sex chara ...
34 Papaya 2.7 Breeding 2.7.1 Objectives The main breeding objective is to develop cultivars with higher yield of better qual- it ...
Botany and Improvement 35 often used for the recovery of desirable traits in such cultivars. Ram (1993) described the use of bac ...
36 Papaya evaluation, the best one can be grown and inter-crossed. After the inter-crossing of superior plants, selection can ag ...
Botany and Improvement 37 for GCA, five papaya inbreds namely, Pusa Delicious, Pusa Majesty, Washington, Sunrise Solo and Waiman ...
38 Papaya But such seeds involve the risk of higher segregating population and sometimes may not be at par with F 1 in performan ...
Botany and Improvement 39 Drew et al. (1998) developed the protocols involving biotechnological skills for hybridisation of papa ...
40 Papaya endosperm. By embryoculture two diploid plants were obtained which turned out to be hermaphrodite. 2.7.6 Mutation Bree ...
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