Briefing Bt cotton

Hybrid Seed Production Creates Plenty of Jobs


Bhagirath Choudhary is an agricultural scientist and founder director of the Delhi-based South Asia Biotechnology Centre. In the last week of September, he brought a delegation of East and Southern Africans to India to learn about advances in hybrid cotton cultivation. This report is based on that tour.

Irrespective of crops, hybrid seeds are more expensive than open pollinated varieties (OPVs).  Hybrids can be produced for those crops that are cross-pollinated like maize and in some cases, for self-pollinated crops like rice, by deploying CMS (Cytoplasmic Male Sterility) or GMS (Genetic Male Sterility) fertilization systems. However, it is difficult to produce hybrids of many self-pollinated crops like wheat, chickpea (chana) and soybean.


A woman pollinating cotton blossoms at a field in Jalna on 1 October 2015. Photo by Bhagirath Ch0udhary.

Hybrid or cross-breed refers to any offspring resulting from the crossing of two genetically distinct individuals (parents), whereas high yielding varieties are selected from a single line.  Hybrids are produced to exploit vigor or heterosis, that is, increase in size, yields or other characteristics over those of the parents. Many of the thirty East and Southern African delegates who came to India in the last week of September on a tour of familiarization with India’s advances in cotton cultivation were curious to know if crossing any pair of inbred parents could produce a desirable hybrid.

Combining any pair of inbred parents may not result in superior offspring or hybrid. Breeders have to carefully choose male-female parents that not only synchronize simultaneously but also demonstrate desirable level of uniformity.  A high level of vigour in the female parent and the pollen producing ability of the male parent are the common denominators for production of uniform, superior and high yielding hybrids (F1).   Hybrids are developed not only for vigour but also  for desirable traits like uniformity, improved colour, resistance to pests and diseases and tolerance to climate stress like drought and salinity.

At Jalna in Maharashtra, skilled women farmers showed the African delegation two methods of creating hybrids: (a) conventional hand emasculation and pollination and (b) new generation male sterility based hybridization.

The emasulation of fully developed buds of the female parent has to be done after 1 p.m. The anthers that are likely to open the next day are removed. The emasculated buds have to be covered with butter paper to avoid cross-pollination from neighbouring cotton fields. The next morning, the emasculated buds are pollinated with the pollen of male parents between 8 a.m. and 11 a.m., which is the period of maximum stigma receptivity. The crossed buds are again covered with butter paper for one or two days for proper fertilization. The success of pollination depends on various factors including sowing of parents in the proper ratio, staggered planting and synchronization, skill of the workers and the guidance of expert staff. Depending on the level of skill about three hundred to fifteen hundred flowers are emasculated per day per person.

This is quite a demanding activity. It takes about four persons working for 180 days to produce cotton hybrid F1 on one acre  or two to three quintals of cotton seed. Farmers usually use one kg of hybrid cotton seed per acre. About 95 percent of India’s cotton acreage of 12.5 million ha is sown with cotton hybrids. That is a lot of employment, which fetches higher wages than conventional cotton growing.

(Top photo by Bhagirath Choudhary of Africans watching a demo at a field in Jalna, Mahatashtra)

Email This Page

Leave a Comment

Hit Counter provided by technology news
Web Design MymensinghPremium WordPress ThemesWeb Development

I Do Not Understand Bt Cotton technology; I Know It Works

Kallanagouda PatilY Kallanagouda Patil, 46, of Uppinbetegeri village in Dharwad taluk  owns 52 acres jointly with his three brothers. He holds a diploma in agriculture from a school in Raichur. Patil grows cotton on ten acres, apart from sugarcane, potato, Bengal gram, jowar, tur,moong and vegetables. He uses groundwater to irrigate his fields. The water is drawn from a depth of 280 feet. Electricity is free so he flood irrigates the fields, except the one under banana  where he uses drip irrigation. He does not micro-irrigate cotton because it is closely planted and has to make way for another crop after eight months. This farmer has his cost all worked out. Making quick mental calculations, he estimates the cost of cotton crop at Rs 22,500 an acre and the realization from 17 quintals an acre at Rs 68,000. He had planted Bayer seed. ‘I do not understand technology, he says, all I know is if I use Bt seed there will be no

Pests Snack on Chilly But Not Cotton

RudagiF Basavaraj Rudagi, 48, did not grow cotton before 2008. This farmer from Saundhi village in Dharwad district’s Kundogol taluk made a partial switch to Bt cotton as chilly was susceptible to pest attack and yield was declining. From five acres in 2009, Rudagi had fifteen of a forty acre joint farm under cotton this year, when smartindianagriculture  caught up with him in February. He tried out Bayer in a change from Mahyco and Raasi seed. Rudagi says he got 11.5 quintals (100 kg) an acre from his rain-fed crop and at Rs 4,050 a quintal, his realization was a little over Rs 46,000. The cost, he says, is Rs 26,000 an acre, excluding rental earnings had he leased out the land. This does not mesh with the profit he claims he makes, but then he admits to not keeping crop-wise accounts. Rudagi also grows peanuts, coriander, gram, safflower and jowar. There is safety in diversity. And yes he plants pigeon pea or tur around the cotton crop for bollworms to feed on so they are not forced by the survival instinct to develop resistance to Bt protein.  In this sense he is quite a cut apart. Low cotton prices are worrying but what is the alternative?